diff options
| author |   Mike Pagano <mpagano@gentoo.org> | 2018-04-30 06:28:53 -0400 |
|---|---|---|
| committer | Mike Pagano <mpagano@gentoo.org> | 2018-04-30 06:28:53 -0400 |
| commit | 9a220db3d81c396e7413cfea5513377e52254613 (patch) | |
| tree | 21d45422f94c419af1ffbf1c420ae4c28d38b0f0 | |
| parent | Linux patch 4.9.96 (diff) | |
| download | linux-patches-4.9-100.tar.gz linux-patches-4.9-100.tar.bz2 linux-patches-4.9-100.zip | |
Linux patch 4.9.974.9-100
| -rw-r--r-- | 0000_README | 4 | ||||
| -rw-r--r-- | 1096_linux-4.9.97.patch | 3632 |
2 files changed, 3636 insertions, 0 deletions
diff --git a/0000_README b/0000_README index 0d1f8898..efef3887 100644 --- a/0000_README +++ b/0000_README @@ -427,6 +427,10 @@ Patch: 1095_linux-4.9.96.patch From: http://www.kernel.org Desc: Linux 4.9.96 +Patch: 1096_linux-4.9.97.patch +From: http://www.kernel.org +Desc: Linux 4.9.97 + Patch: 1500_XATTR_USER_PREFIX.patch From: https://bugs.gentoo.org/show_bug.cgi?id=470644 Desc: Support for namespace user.pax.* on tmpfs. diff --git a/1096_linux-4.9.97.patch b/1096_linux-4.9.97.patch new file mode 100644 index 00000000..26c13e01 --- /dev/null +++ b/1096_linux-4.9.97.patch @@ -0,0 +1,3632 @@ +diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt +index 466c039c622b..5f9e51436a99 100644 +--- a/Documentation/kernel-parameters.txt ++++ b/Documentation/kernel-parameters.txt +@@ -2640,6 +2640,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. + + noalign [KNL,ARM] + ++ noaltinstr [S390] Disables alternative instructions patching ++ (CPU alternatives feature). ++ + noapic [SMP,APIC] Tells the kernel to not make use of any + IOAPICs that may be present in the system. + +diff --git a/Makefile b/Makefile +index 50ae573e8951..ee3e943c3bd9 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,6 +1,6 @@ + VERSION = 4 + PATCHLEVEL = 9 +-SUBLEVEL = 96 ++SUBLEVEL = 97 + EXTRAVERSION = + NAME = Roaring Lionus + +diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig +index 2d2fd79ced9d..34fbbf8fdeaa 100644 +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -95,6 +95,7 @@ config MIPS_GENERIC + select PCI_DRIVERS_GENERIC + select PINCTRL + select SMP_UP if SMP ++ select SWAP_IO_SPACE + select SYS_HAS_CPU_MIPS32_R1 + select SYS_HAS_CPU_MIPS32_R2 + select SYS_HAS_CPU_MIPS32_R6 +diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig +index 9aa0d04c9dcc..1c4a595e8224 100644 +--- a/arch/s390/Kconfig ++++ b/arch/s390/Kconfig +@@ -118,6 +118,7 @@ config S390 + select GENERIC_CLOCKEVENTS + select GENERIC_CPU_AUTOPROBE + select GENERIC_CPU_DEVICES if !SMP ++ select GENERIC_CPU_VULNERABILITIES + select GENERIC_FIND_FIRST_BIT + select GENERIC_SMP_IDLE_THREAD + select GENERIC_TIME_VSYSCALL +@@ -704,6 +705,51 @@ config SECCOMP + + If unsure, say Y. + ++config KERNEL_NOBP ++ def_bool n ++ prompt "Enable modified branch prediction for the kernel by default" ++ help ++ If this option is selected the kernel will switch to a modified ++ branch prediction mode if the firmware interface is available. ++ The modified branch prediction mode improves the behaviour in ++ regard to speculative execution. ++ ++ With the option enabled the kernel parameter "nobp=0" or "nospec" ++ can be used to run the kernel in the normal branch prediction mode. ++ ++ With the option disabled the modified branch prediction mode is ++ enabled with the "nobp=1" kernel parameter. ++ ++ If unsure, say N. ++ ++config EXPOLINE ++ def_bool n ++ prompt "Avoid speculative indirect branches in the kernel" ++ help ++ Compile the kernel with the expoline compiler options to guard ++ against kernel-to-user data leaks by avoiding speculative indirect ++ branches. ++ Requires a compiler with -mindirect-branch=thunk support for full ++ protection. The kernel may run slower. ++ ++ If unsure, say N. ++ ++choice ++ prompt "Expoline default" ++ depends on EXPOLINE ++ default EXPOLINE_FULL ++ ++config EXPOLINE_OFF ++ bool "spectre_v2=off" ++ ++config EXPOLINE_AUTO ++ bool "spectre_v2=auto" ++ ++config EXPOLINE_FULL ++ bool "spectre_v2=on" ++ ++endchoice ++ + endmenu + + menu "Power Management" +@@ -753,6 +799,7 @@ config PFAULT + config SHARED_KERNEL + bool "VM shared kernel support" + depends on !JUMP_LABEL ++ depends on !ALTERNATIVES + help + Select this option, if you want to share the text segment of the + Linux kernel between different VM guests. This reduces memory +diff --git a/arch/s390/Makefile b/arch/s390/Makefile +index 54e00526b8df..bef67c0f63e2 100644 +--- a/arch/s390/Makefile ++++ b/arch/s390/Makefile +@@ -79,6 +79,16 @@ ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) + cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack + endif + ++ifdef CONFIG_EXPOLINE ++ ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) ++ CC_FLAGS_EXPOLINE := -mindirect-branch=thunk ++ CC_FLAGS_EXPOLINE += -mfunction-return=thunk ++ CC_FLAGS_EXPOLINE += -mindirect-branch-table ++ export CC_FLAGS_EXPOLINE ++ cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE ++ endif ++endif ++ + ifdef CONFIG_FUNCTION_TRACER + # make use of hotpatch feature if the compiler supports it + cc_hotpatch := -mhotpatch=0,3 +diff --git a/arch/s390/include/asm/alternative.h b/arch/s390/include/asm/alternative.h +new file mode 100644 +index 000000000000..a72002056b54 +--- /dev/null ++++ b/arch/s390/include/asm/alternative.h +@@ -0,0 +1,149 @@ ++#ifndef _ASM_S390_ALTERNATIVE_H ++#define _ASM_S390_ALTERNATIVE_H ++ ++#ifndef __ASSEMBLY__ ++ ++#include <linux/types.h> ++#include <linux/stddef.h> ++#include <linux/stringify.h> ++ ++struct alt_instr { ++ s32 instr_offset; /* original instruction */ ++ s32 repl_offset; /* offset to replacement instruction */ ++ u16 facility; /* facility bit set for replacement */ ++ u8 instrlen; /* length of original instruction */ ++ u8 replacementlen; /* length of new instruction */ ++} __packed; ++ ++void apply_alternative_instructions(void); ++void apply_alternatives(struct alt_instr *start, struct alt_instr *end); ++ ++/* ++ * |661: |662: |6620 |663: ++ * +-----------+---------------------+ ++ * | oldinstr | oldinstr_padding | ++ * | +----------+----------+ ++ * | | | | ++ * | | >6 bytes |6/4/2 nops| ++ * | |6 bytes jg-----------> ++ * +-----------+---------------------+ ++ * ^^ static padding ^^ ++ * ++ * .altinstr_replacement section ++ * +---------------------+-----------+ ++ * |6641: |6651: ++ * | alternative instr 1 | ++ * +-----------+---------+- - - - - -+ ++ * |6642: |6652: | ++ * | alternative instr 2 | padding ++ * +---------------------+- - - - - -+ ++ * ^ runtime ^ ++ * ++ * .altinstructions section ++ * +---------------------------------+ ++ * | alt_instr entries for each | ++ * | alternative instr | ++ * +---------------------------------+ ++ */ ++ ++#define b_altinstr(num) "664"#num ++#define e_altinstr(num) "665"#num ++ ++#define e_oldinstr_pad_end "663" ++#define oldinstr_len "662b-661b" ++#define oldinstr_total_len e_oldinstr_pad_end"b-661b" ++#define altinstr_len(num) e_altinstr(num)"b-"b_altinstr(num)"b" ++#define oldinstr_pad_len(num) \ ++ "-(((" altinstr_len(num) ")-(" oldinstr_len ")) > 0) * " \ ++ "((" altinstr_len(num) ")-(" oldinstr_len "))" ++ ++#define INSTR_LEN_SANITY_CHECK(len) \ ++ ".if " len " > 254\n" \ ++ "\t.error \"cpu alternatives does not support instructions " \ ++ "blocks > 254 bytes\"\n" \ ++ ".endif\n" \ ++ ".if (" len ") %% 2\n" \ ++ "\t.error \"cpu alternatives instructions length is odd\"\n" \ ++ ".endif\n" ++ ++#define OLDINSTR_PADDING(oldinstr, num) \ ++ ".if " oldinstr_pad_len(num) " > 6\n" \ ++ "\tjg " e_oldinstr_pad_end "f\n" \ ++ "6620:\n" \ ++ "\t.fill (" oldinstr_pad_len(num) " - (6620b-662b)) / 2, 2, 0x0700\n" \ ++ ".else\n" \ ++ "\t.fill " oldinstr_pad_len(num) " / 6, 6, 0xc0040000\n" \ ++ "\t.fill " oldinstr_pad_len(num) " %% 6 / 4, 4, 0x47000000\n" \ ++ "\t.fill " oldinstr_pad_len(num) " %% 6 %% 4 / 2, 2, 0x0700\n" \ ++ ".endif\n" ++ ++#define OLDINSTR(oldinstr, num) \ ++ "661:\n\t" oldinstr "\n662:\n" \ ++ OLDINSTR_PADDING(oldinstr, num) \ ++ e_oldinstr_pad_end ":\n" \ ++ INSTR_LEN_SANITY_CHECK(oldinstr_len) ++ ++#define OLDINSTR_2(oldinstr, num1, num2) \ ++ "661:\n\t" oldinstr "\n662:\n" \ ++ ".if " altinstr_len(num1) " < " altinstr_len(num2) "\n" \ ++ OLDINSTR_PADDING(oldinstr, num2) \ ++ ".else\n" \ ++ OLDINSTR_PADDING(oldinstr, num1) \ ++ ".endif\n" \ ++ e_oldinstr_pad_end ":\n" \ ++ INSTR_LEN_SANITY_CHECK(oldinstr_len) ++ ++#define ALTINSTR_ENTRY(facility, num) \ ++ "\t.long 661b - .\n" /* old instruction */ \ ++ "\t.long " b_altinstr(num)"b - .\n" /* alt instruction */ \ ++ "\t.word " __stringify(facility) "\n" /* facility bit */ \ ++ "\t.byte " oldinstr_total_len "\n" /* source len */ \ ++ "\t.byte " altinstr_len(num) "\n" /* alt instruction len */ ++ ++#define ALTINSTR_REPLACEMENT(altinstr, num) /* replacement */ \ ++ b_altinstr(num)":\n\t" altinstr "\n" e_altinstr(num) ":\n" \ ++ INSTR_LEN_SANITY_CHECK(altinstr_len(num)) ++ ++/* alternative assembly primitive: */ ++#define ALTERNATIVE(oldinstr, altinstr, facility) \ ++ ".pushsection .altinstr_replacement, \"ax\"\n" \ ++ ALTINSTR_REPLACEMENT(altinstr, 1) \ ++ ".popsection\n" \ ++ OLDINSTR(oldinstr, 1) \ ++ ".pushsection .altinstructions,\"a\"\n" \ ++ ALTINSTR_ENTRY(facility, 1) \ ++ ".popsection\n" ++ ++#define ALTERNATIVE_2(oldinstr, altinstr1, facility1, altinstr2, facility2)\ ++ ".pushsection .altinstr_replacement, \"ax\"\n" \ ++ ALTINSTR_REPLACEMENT(altinstr1, 1) \ ++ ALTINSTR_REPLACEMENT(altinstr2, 2) \ ++ ".popsection\n" \ ++ OLDINSTR_2(oldinstr, 1, 2) \ ++ ".pushsection .altinstructions,\"a\"\n" \ ++ ALTINSTR_ENTRY(facility1, 1) \ ++ ALTINSTR_ENTRY(facility2, 2) \ ++ ".popsection\n" ++ ++/* ++ * Alternative instructions for different CPU types or capabilities. ++ * ++ * This allows to use optimized instructions even on generic binary ++ * kernels. ++ * ++ * oldinstr is padded with jump and nops at compile time if altinstr is ++ * longer. altinstr is padded with jump and nops at run-time during patching. ++ * ++ * For non barrier like inlines please define new variants ++ * without volatile and memory clobber. ++ */ ++#define alternative(oldinstr, altinstr, facility) \ ++ asm volatile(ALTERNATIVE(oldinstr, altinstr, facility) : : : "memory") ++ ++#define alternative_2(oldinstr, altinstr1, facility1, altinstr2, facility2) \ ++ asm volatile(ALTERNATIVE_2(oldinstr, altinstr1, facility1, \ ++ altinstr2, facility2) ::: "memory") ++ ++#endif /* __ASSEMBLY__ */ ++ ++#endif /* _ASM_S390_ALTERNATIVE_H */ +diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h +index 5c8db3ce61c8..03b2e5bf1206 100644 +--- a/arch/s390/include/asm/barrier.h ++++ b/arch/s390/include/asm/barrier.h +@@ -48,6 +48,30 @@ do { \ + #define __smp_mb__before_atomic() barrier() + #define __smp_mb__after_atomic() barrier() + ++/** ++ * array_index_mask_nospec - generate a mask for array_idx() that is ++ * ~0UL when the bounds check succeeds and 0 otherwise ++ * @index: array element index ++ * @size: number of elements in array ++ */ ++#define array_index_mask_nospec array_index_mask_nospec ++static inline unsigned long array_index_mask_nospec(unsigned long index, ++ unsigned long size) ++{ ++ unsigned long mask; ++ ++ if (__builtin_constant_p(size) && size > 0) { ++ asm(" clgr %2,%1\n" ++ " slbgr %0,%0\n" ++ :"=d" (mask) : "d" (size-1), "d" (index) :"cc"); ++ return mask; ++ } ++ asm(" clgr %1,%2\n" ++ " slbgr %0,%0\n" ++ :"=d" (mask) : "d" (size), "d" (index) :"cc"); ++ return ~mask; ++} ++ + #include <asm-generic/barrier.h> + + #endif /* __ASM_BARRIER_H */ +diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h +index 09b406db7529..7a8a1457dbb8 100644 +--- a/arch/s390/include/asm/facility.h ++++ b/arch/s390/include/asm/facility.h +@@ -17,6 +17,24 @@ + + #define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */ + ++static inline void __set_facility(unsigned long nr, void *facilities) ++{ ++ unsigned char *ptr = (unsigned char *) facilities; ++ ++ if (nr >= MAX_FACILITY_BIT) ++ return; ++ ptr[nr >> 3] |= 0x80 >> (nr & 7); ++} ++ ++static inline void __clear_facility(unsigned long nr, void *facilities) ++{ ++ unsigned char *ptr = (unsigned char *) facilities; ++ ++ if (nr >= MAX_FACILITY_BIT) ++ return; ++ ptr[nr >> 3] &= ~(0x80 >> (nr & 7)); ++} ++ + static inline int __test_facility(unsigned long nr, void *facilities) + { + unsigned char *ptr; +diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h +index a41faf34b034..5792590d0e7c 100644 +--- a/arch/s390/include/asm/kvm_host.h ++++ b/arch/s390/include/asm/kvm_host.h +@@ -181,7 +181,8 @@ struct kvm_s390_sie_block { + __u16 ipa; /* 0x0056 */ + __u32 ipb; /* 0x0058 */ + __u32 scaoh; /* 0x005c */ +- __u8 reserved60; /* 0x0060 */ ++#define FPF_BPBC 0x20 ++ __u8 fpf; /* 0x0060 */ + __u8 ecb; /* 0x0061 */ + __u8 ecb2; /* 0x0062 */ + #define ECB3_AES 0x04 +diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h +index 7b93b78f423c..ad4e0cee1557 100644 +--- a/arch/s390/include/asm/lowcore.h ++++ b/arch/s390/include/asm/lowcore.h +@@ -135,7 +135,9 @@ struct lowcore { + /* Per cpu primary space access list */ + __u32 paste[16]; /* 0x0400 */ + +- __u8 pad_0x04c0[0x0e00-0x0440]; /* 0x0440 */ ++ /* br %r1 trampoline */ ++ __u16 br_r1_trampoline; /* 0x0440 */ ++ __u8 pad_0x0442[0x0e00-0x0442]; /* 0x0442 */ + + /* + * 0xe00 contains the address of the IPL Parameter Information +@@ -150,7 +152,8 @@ struct lowcore { + __u8 pad_0x0e20[0x0f00-0x0e20]; /* 0x0e20 */ + + /* Extended facility list */ +- __u64 stfle_fac_list[32]; /* 0x0f00 */ ++ __u64 stfle_fac_list[16]; /* 0x0f00 */ ++ __u64 alt_stfle_fac_list[16]; /* 0x0f80 */ + __u8 pad_0x1000[0x11b0-0x1000]; /* 0x1000 */ + + /* Pointer to vector register save area */ +diff --git a/arch/s390/include/asm/nospec-branch.h b/arch/s390/include/asm/nospec-branch.h +new file mode 100644 +index 000000000000..b4bd8c41e9d3 +--- /dev/null ++++ b/arch/s390/include/asm/nospec-branch.h +@@ -0,0 +1,17 @@ ++/* SPDX-License-Identifier: GPL-2.0 */ ++#ifndef _ASM_S390_EXPOLINE_H ++#define _ASM_S390_EXPOLINE_H ++ ++#ifndef __ASSEMBLY__ ++ ++#include <linux/types.h> ++ ++extern int nospec_disable; ++ ++void nospec_init_branches(void); ++void nospec_auto_detect(void); ++void nospec_revert(s32 *start, s32 *end); ++ ++#endif /* __ASSEMBLY__ */ ++ ++#endif /* _ASM_S390_EXPOLINE_H */ +diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h +index 6bcbbece082b..d5842126ec70 100644 +--- a/arch/s390/include/asm/processor.h ++++ b/arch/s390/include/asm/processor.h +@@ -84,6 +84,7 @@ void cpu_detect_mhz_feature(void); + extern const struct seq_operations cpuinfo_op; + extern int sysctl_ieee_emulation_warnings; + extern void execve_tail(void); ++extern void __bpon(void); + + /* + * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. +@@ -359,6 +360,9 @@ extern void memcpy_absolute(void *, void *, size_t); + memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \ + } + ++extern int s390_isolate_bp(void); ++extern int s390_isolate_bp_guest(void); ++ + #endif /* __ASSEMBLY__ */ + + #endif /* __ASM_S390_PROCESSOR_H */ +diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h +index f15c0398c363..84f2ae44b4e9 100644 +--- a/arch/s390/include/asm/thread_info.h ++++ b/arch/s390/include/asm/thread_info.h +@@ -79,6 +79,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); + #define TIF_SECCOMP 5 /* secure computing */ + #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ + #define TIF_UPROBE 7 /* breakpointed or single-stepping */ ++#define TIF_ISOLATE_BP 8 /* Run process with isolated BP */ ++#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */ + #define TIF_31BIT 16 /* 32bit process */ + #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ + #define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */ +@@ -94,6 +96,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); + #define _TIF_SECCOMP _BITUL(TIF_SECCOMP) + #define _TIF_SYSCALL_TRACEPOINT _BITUL(TIF_SYSCALL_TRACEPOINT) + #define _TIF_UPROBE _BITUL(TIF_UPROBE) ++#define _TIF_ISOLATE_BP _BITUL(TIF_ISOLATE_BP) ++#define _TIF_ISOLATE_BP_GUEST _BITUL(TIF_ISOLATE_BP_GUEST) + #define _TIF_31BIT _BITUL(TIF_31BIT) + #define _TIF_SINGLE_STEP _BITUL(TIF_SINGLE_STEP) + +diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h +index a2ffec4139ad..81c02e198527 100644 +--- a/arch/s390/include/uapi/asm/kvm.h ++++ b/arch/s390/include/uapi/asm/kvm.h +@@ -197,6 +197,7 @@ struct kvm_guest_debug_arch { + #define KVM_SYNC_VRS (1UL << 6) + #define KVM_SYNC_RICCB (1UL << 7) + #define KVM_SYNC_FPRS (1UL << 8) ++#define KVM_SYNC_BPBC (1UL << 10) + /* definition of registers in kvm_run */ + struct kvm_sync_regs { + __u64 prefix; /* prefix register */ +@@ -217,7 +218,9 @@ struct kvm_sync_regs { + }; + __u8 reserved[512]; /* for future vector expansion */ + __u32 fpc; /* valid on KVM_SYNC_VRS or KVM_SYNC_FPRS */ +- __u8 padding[52]; /* riccb needs to be 64byte aligned */ ++ __u8 bpbc : 1; /* bp mode */ ++ __u8 reserved2 : 7; ++ __u8 padding1[51]; /* riccb needs to be 64byte aligned */ + __u8 riccb[64]; /* runtime instrumentation controls block */ + }; + +diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile +index 1f0fe98f6db9..0501cac2ab95 100644 +--- a/arch/s390/kernel/Makefile ++++ b/arch/s390/kernel/Makefile +@@ -42,6 +42,7 @@ ifneq ($(CC_FLAGS_MARCH),-march=z900) + CFLAGS_REMOVE_sclp.o += $(CC_FLAGS_MARCH) + CFLAGS_sclp.o += -march=z900 + CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH) ++CFLAGS_REMOVE_als.o += $(CC_FLAGS_EXPOLINE) + CFLAGS_als.o += -march=z900 + AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH) + AFLAGS_head.o += -march=z900 +@@ -57,10 +58,13 @@ obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o + obj-y += debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o als.o + obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o + obj-y += runtime_instr.o cache.o fpu.o dumpstack.o +-obj-y += entry.o reipl.o relocate_kernel.o ++obj-y += entry.o reipl.o relocate_kernel.o alternative.o ++obj-y += nospec-branch.o + + extra-y += head.o head64.o vmlinux.lds + ++CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE) ++ + obj-$(CONFIG_MODULES) += module.o + obj-$(CONFIG_SMP) += smp.o + obj-$(CONFIG_SCHED_TOPOLOGY) += topology.o +diff --git a/arch/s390/kernel/alternative.c b/arch/s390/kernel/alternative.c +new file mode 100644 +index 000000000000..b57b293998dc +--- /dev/null ++++ b/arch/s390/kernel/alternative.c +@@ -0,0 +1,112 @@ ++#include <linux/module.h> ++#include <asm/alternative.h> ++#include <asm/facility.h> ++#include <asm/nospec-branch.h> ++ ++#define MAX_PATCH_LEN (255 - 1) ++ ++static int __initdata_or_module alt_instr_disabled; ++ ++static int __init disable_alternative_instructions(char *str) ++{ ++ alt_instr_disabled = 1; ++ return 0; ++} ++ ++early_param("noaltinstr", disable_alternative_instructions); ++ ++struct brcl_insn { ++ u16 opc; ++ s32 disp; ++} __packed; ++ ++static u16 __initdata_or_module nop16 = 0x0700; ++static u32 __initdata_or_module nop32 = 0x47000000; ++static struct brcl_insn __initdata_or_module nop48 = { ++ 0xc004, 0 ++}; ++ ++static const void *nops[] __initdata_or_module = { ++ &nop16, ++ &nop32, ++ &nop48 ++}; ++ ++static void __init_or_module add_jump_padding(void *insns, unsigned int len) ++{ ++ struct brcl_insn brcl = { ++ 0xc0f4, ++ len / 2 ++ }; ++ ++ memcpy(insns, &brcl, sizeof(brcl)); ++ insns += sizeof(brcl); ++ len -= sizeof(brcl); ++ ++ while (len > 0) { ++ memcpy(insns, &nop16, 2); ++ insns += 2; ++ len -= 2; ++ } ++} ++ ++static void __init_or_module add_padding(void *insns, unsigned int len) ++{ ++ if (len > 6) ++ add_jump_padding(insns, len); ++ else if (len >= 2) ++ memcpy(insns, nops[len / 2 - 1], len); ++} ++ ++static void __init_or_module __apply_alternatives(struct alt_instr *start, ++ struct alt_instr *end) ++{ ++ struct alt_instr *a; ++ u8 *instr, *replacement; ++ u8 insnbuf[MAX_PATCH_LEN]; ++ ++ /* ++ * The scan order should be from start to end. A later scanned ++ * alternative code can overwrite previously scanned alternative code. ++ */ ++ for (a = start; a < end; a++) { ++ int insnbuf_sz = 0; ++ ++ instr = (u8 *)&a->instr_offset + a->instr_offset; ++ replacement = (u8 *)&a->repl_offset + a->repl_offset; ++ ++ if (!__test_facility(a->facility, ++ S390_lowcore.alt_stfle_fac_list)) ++ continue; ++ ++ if (unlikely(a->instrlen % 2 || a->replacementlen % 2)) { ++ WARN_ONCE(1, "cpu alternatives instructions length is " ++ "odd, skipping patching\n"); ++ continue; ++ } ++ ++ memcpy(insnbuf, replacement, a->replacementlen); ++ insnbuf_sz = a->replacementlen; ++ ++ if (a->instrlen > a->replacementlen) { ++ add_padding(insnbuf + a->replacementlen, ++ a->instrlen - a->replacementlen); ++ insnbuf_sz += a->instrlen - a->replacementlen; ++ } ++ ++ s390_kernel_write(instr, insnbuf, insnbuf_sz); ++ } ++} ++ ++void __init_or_module apply_alternatives(struct alt_instr *start, ++ struct alt_instr *end) ++{ ++ if (!alt_instr_disabled) ++ __apply_alternatives(start, end); ++} ++ ++extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; ++void __init apply_alternative_instructions(void) ++{ ++ apply_alternatives(__alt_instructions, __alt_instructions_end); ++} +diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c +index 62578989c74d..0c7a7d5d95f1 100644 +--- a/arch/s390/kernel/early.c ++++ b/arch/s390/kernel/early.c +@@ -299,6 +299,11 @@ static noinline __init void setup_facility_list(void) + { + stfle(S390_lowcore.stfle_fac_list, + ARRAY_SIZE(S390_lowcore.stfle_fac_list)); ++ memcpy(S390_lowcore.alt_stfle_fac_list, ++ S390_lowcore.stfle_fac_list, ++ sizeof(S390_lowcore.alt_stfle_fac_list)); ++ if (!IS_ENABLED(CONFIG_KERNEL_NOBP)) ++ __clear_facility(82, S390_lowcore.alt_stfle_fac_list); + } + + static __init void detect_diag9c(void) +diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S +index 3bc2825173ef..1996afeb2e81 100644 +--- a/arch/s390/kernel/entry.S ++++ b/arch/s390/kernel/entry.S +@@ -105,6 +105,7 @@ _PIF_WORK = (_PIF_PER_TRAP) + j 3f + 1: LAST_BREAK %r14 + UPDATE_VTIME %r14,%r15,\timer ++ BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP + 2: lg %r15,__LC_ASYNC_STACK # load async stack + 3: la %r11,STACK_FRAME_OVERHEAD(%r15) + .endm +@@ -163,6 +164,130 @@ _PIF_WORK = (_PIF_PER_TRAP) + tm off+\addr, \mask + .endm + ++ .macro BPOFF ++ .pushsection .altinstr_replacement, "ax" ++660: .long 0xb2e8c000 ++ .popsection ++661: .long 0x47000000 ++ .pushsection .altinstructions, "a" ++ .long 661b - . ++ .long 660b - . ++ .word 82 ++ .byte 4 ++ .byte 4 ++ .popsection ++ .endm ++ ++ .macro BPON ++ .pushsection .altinstr_replacement, "ax" ++662: .long 0xb2e8d000 ++ .popsection ++663: .long 0x47000000 ++ .pushsection .altinstructions, "a" ++ .long 663b - . ++ .long 662b - . ++ .word 82 ++ .byte 4 ++ .byte 4 ++ .popsection ++ .endm ++ ++ .macro BPENTER tif_ptr,tif_mask ++ .pushsection .altinstr_replacement, "ax" ++662: .word 0xc004, 0x0000, 0x0000 # 6 byte nop ++ .word 0xc004, 0x0000, 0x0000 # 6 byte nop ++ .popsection ++664: TSTMSK \tif_ptr,\tif_mask ++ jz . + 8 ++ .long 0xb2e8d000 ++ .pushsection .altinstructions, "a" ++ .long 664b - . ++ .long 662b - . ++ .word 82 ++ .byte 12 ++ .byte 12 ++ .popsection ++ .endm ++ ++ .macro BPEXIT tif_ptr,tif_mask ++ TSTMSK \tif_ptr,\tif_mask ++ .pushsection .altinstr_replacement, "ax" ++662: jnz . + 8 ++ .long 0xb2e8d000 ++ .popsection ++664: jz . + 8 ++ .long 0xb2e8c000 ++ .pushsection .altinstructions, "a" ++ .long 664b - . ++ .long 662b - . ++ .word 82 ++ .byte 8 ++ .byte 8 ++ .popsection ++ .endm ++ ++#ifdef CONFIG_EXPOLINE ++ ++ .macro GEN_BR_THUNK name,reg,tmp ++ .section .text.\name,"axG",@progbits,\name,comdat ++ .globl \name ++ .hidden \name ++ .type \name,@function ++\name: ++ .cfi_startproc ++#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES ++ exrl 0,0f ++#else ++ larl \tmp,0f ++ ex 0,0(\tmp) ++#endif ++ j . ++0: br \reg ++ .cfi_endproc ++ .endm ++ ++ GEN_BR_THUNK __s390x_indirect_jump_r1use_r9,%r9,%r1 ++ GEN_BR_THUNK __s390x_indirect_jump_r1use_r14,%r14,%r1 ++ GEN_BR_THUNK __s390x_indirect_jump_r11use_r14,%r14,%r11 ++ ++ .macro BASR_R14_R9 ++0: brasl %r14,__s390x_indirect_jump_r1use_r9 ++ .pushsection .s390_indirect_branches,"a",@progbits ++ .long 0b-. ++ .popsection ++ .endm ++ ++ .macro BR_R1USE_R14 ++0: jg __s390x_indirect_jump_r1use_r14 ++ .pushsection .s390_indirect_branches,"a",@progbits ++ .long 0b-. ++ .popsection ++ .endm ++ ++ .macro BR_R11USE_R14 ++0: jg __s390x_indirect_jump_r11use_r14 ++ .pushsection .s390_indirect_branches,"a",@progbits ++ .long 0b-. ++ .popsection ++ .endm ++ ++#else /* CONFIG_EXPOLINE */ ++ ++ .macro BASR_R14_R9 ++ basr %r14,%r9 ++ .endm ++ ++ .macro BR_R1USE_R14 ++ br %r14 ++ .endm ++ ++ .macro BR_R11USE_R14 ++ br %r14 ++ .endm ++ ++#endif /* CONFIG_EXPOLINE */ ++ ++ + .section .kprobes.text, "ax" + .Ldummy: + /* +@@ -175,6 +300,11 @@ _PIF_WORK = (_PIF_PER_TRAP) + */ + nop 0 + ++ENTRY(__bpon) ++ .globl __bpon ++ BPON ++ BR_R1USE_R14 ++ + /* + * Scheduler resume function, called by switch_to + * gpr2 = (task_struct *) prev +@@ -201,9 +331,9 @@ ENTRY(__switch_to) + mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next + lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task + TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP +- bzr %r14 ++ jz 0f + .insn s,0xb2800000,__LC_LPP # set program parameter +- br %r14 ++0: BR_R1USE_R14 + + .L__critical_start: + +@@ -215,9 +345,11 @@ ENTRY(__switch_to) + */ + ENTRY(sie64a) + stmg %r6,%r14,__SF_GPRS(%r15) # save kernel registers ++ lg %r12,__LC_CURRENT + stg %r2,__SF_EMPTY(%r15) # save control block pointer + stg %r3,__SF_EMPTY+8(%r15) # save guest register save area + xc __SF_EMPTY+16(8,%r15),__SF_EMPTY+16(%r15) # reason code = 0 ++ mvc __SF_EMPTY+24(8,%r15),__TI_flags(%r12) # copy thread flags + TSTMSK __LC_CPU_FLAGS,_CIF_FPU # load guest fp/vx registers ? + jno .Lsie_load_guest_gprs + brasl %r14,load_fpu_regs # load guest fp/vx regs +@@ -234,7 +366,11 @@ ENTRY(sie64a) + jnz .Lsie_skip + TSTMSK __LC_CPU_FLAGS,_CIF_FPU + jo .Lsie_skip # exit if fp/vx regs changed ++ BPEXIT __SF_EMPTY+24(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST) + sie 0(%r14) ++.Lsie_exit: ++ BPOFF ++ BPENTER __SF_EMPTY+24(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST) + .Lsie_skip: + ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE + lctlg %c1,%c1,__LC_USER_ASCE # load primary asce +@@ -255,9 +391,15 @@ ENTRY(sie64a) + sie_exit: + lg %r14,__SF_EMPTY+8(%r15) # load guest register save area + stmg %r0,%r13,0(%r14) # save guest gprs 0-13 ++ xgr %r0,%r0 # clear guest registers to ++ xgr %r1,%r1 # prevent speculative use ++ xgr %r2,%r2 ++ xgr %r3,%r3 ++ xgr %r4,%r4 ++ xgr %r5,%r5 + lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers + lg %r2,__SF_EMPTY+16(%r15) # return exit reason code +- br %r14 ++ BR_R1USE_R14 + .Lsie_fault: + lghi %r14,-EFAULT + stg %r14,__SF_EMPTY+16(%r15) # set exit reason code +@@ -280,6 +422,7 @@ ENTRY(system_call) + stpt __LC_SYNC_ENTER_TIMER + .Lsysc_stmg: + stmg %r8,%r15,__LC_SAVE_AREA_SYNC ++ BPOFF + lg %r10,__LC_LAST_BREAK + lg %r12,__LC_THREAD_INFO + lghi %r14,_PIF_SYSCALL +@@ -289,12 +432,15 @@ ENTRY(system_call) + LAST_BREAK %r13 + .Lsysc_vtime: + UPDATE_VTIME %r10,%r13,__LC_SYNC_ENTER_TIMER ++ BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP + stmg %r0,%r7,__PT_R0(%r11) + mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC + mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW + mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC + stg %r14,__PT_FLAGS(%r11) + .Lsysc_do_svc: ++ # clear user controlled register to prevent speculative use ++ xgr %r0,%r0 + lg %r10,__TI_sysc_table(%r12) # address of system call table + llgh %r8,__PT_INT_CODE+2(%r11) + slag %r8,%r8,2 # shift and test for svc 0 +@@ -312,7 +458,7 @@ ENTRY(system_call) + lgf %r9,0(%r8,%r10) # get system call add. + TSTMSK __TI_flags(%r12),_TIF_TRACE + jnz .Lsysc_tracesys +- basr %r14,%r9 # call sys_xxxx ++ BASR_R14_R9 # call sys_xxxx + stg %r2,__PT_R2(%r11) # store return value + + .Lsysc_return: +@@ -324,6 +470,7 @@ ENTRY(system_call) + jnz .Lsysc_work # check for work + TSTMSK __LC_CPU_FLAGS,_CIF_WORK + jnz .Lsysc_work ++ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP + .Lsysc_restore: + lg %r14,__LC_VDSO_PER_CPU + lmg %r0,%r10,__PT_R0(%r11) +@@ -451,7 +598,7 @@ ENTRY(system_call) + lmg %r3,%r7,__PT_R3(%r11) + stg %r7,STACK_FRAME_OVERHEAD(%r15) + lg %r2,__PT_ORIG_GPR2(%r11) +- basr %r14,%r9 # call sys_xxx ++ BASR_R14_R9 # call sys_xxx + stg %r2,__PT_R2(%r11) # store return value + .Lsysc_tracenogo: + TSTMSK __TI_flags(%r12),_TIF_TRACE +@@ -475,7 +622,7 @@ ENTRY(ret_from_fork) + lmg %r9,%r10,__PT_R9(%r11) # load gprs + ENTRY(kernel_thread_starter) + la %r2,0(%r10) +- basr %r14,%r9 ++ BASR_R14_R9 + j .Lsysc_tracenogo + + /* +@@ -484,6 +631,7 @@ ENTRY(kernel_thread_starter) + + ENTRY(pgm_check_handler) + stpt __LC_SYNC_ENTER_TIMER ++ BPOFF + stmg %r8,%r15,__LC_SAVE_AREA_SYNC + lg %r10,__LC_LAST_BREAK + lg %r12,__LC_THREAD_INFO +@@ -508,6 +656,7 @@ ENTRY(pgm_check_handler) + j 3f + 2: LAST_BREAK %r14 + UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER ++ BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP + lg %r15,__LC_KERNEL_STACK + lg %r14,__TI_task(%r12) + aghi %r14,__TASK_thread # pointer to thread_struct +@@ -517,6 +666,15 @@ ENTRY(pgm_check_handler) + mvc __THREAD_trap_tdb(256,%r14),0(%r13) + 3: la %r11,STACK_FRAME_OVERHEAD(%r15) + stmg %r0,%r7,__PT_R0(%r11) ++ # clear user controlled registers to prevent speculative use ++ xgr %r0,%r0 ++ xgr %r1,%r1 ++ xgr %r2,%r2 ++ xgr %r3,%r3 ++ xgr %r4,%r4 ++ xgr %r5,%r5 ++ xgr %r6,%r6 ++ xgr %r7,%r7 + mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC + stmg %r8,%r9,__PT_PSW(%r11) + mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC +@@ -538,9 +696,9 @@ ENTRY(pgm_check_handler) + nill %r10,0x007f + sll %r10,2 + je .Lpgm_return +- lgf %r1,0(%r10,%r1) # load address of handler routine ++ lgf %r9,0(%r10,%r1) # load address of handler routine + lgr %r2,%r11 # pass pointer to pt_regs +- basr %r14,%r1 # branch to interrupt-handler ++ BASR_R14_R9 # branch to interrupt-handler + .Lpgm_return: + LOCKDEP_SYS_EXIT + tm __PT_PSW+1(%r11),0x01 # returning to user ? +@@ -573,6 +731,7 @@ ENTRY(pgm_check_handler) + ENTRY(io_int_handler) + STCK __LC_INT_CLOCK + stpt __LC_ASYNC_ENTER_TIMER ++ BPOFF + stmg %r8,%r15,__LC_SAVE_AREA_ASYNC + lg %r10,__LC_LAST_BREAK + lg %r12,__LC_THREAD_INFO +@@ -580,6 +739,16 @@ ENTRY(io_int_handler) + lmg %r8,%r9,__LC_IO_OLD_PSW + SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER + stmg %r0,%r7,__PT_R0(%r11) ++ # clear user controlled registers to prevent speculative use ++ xgr %r0,%r0 ++ xgr %r1,%r1 ++ xgr %r2,%r2 ++ xgr %r3,%r3 ++ xgr %r4,%r4 ++ xgr %r5,%r5 ++ xgr %r6,%r6 ++ xgr %r7,%r7 ++ xgr %r10,%r10 + mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC + stmg %r8,%r9,__PT_PSW(%r11) + mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID +@@ -614,9 +783,13 @@ ENTRY(io_int_handler) + lg %r14,__LC_VDSO_PER_CPU + lmg %r0,%r10,__PT_R0(%r11) + mvc __LC_RETURN_PSW(16),__PT_PSW(%r11) ++ tm __PT_PSW+1(%r11),0x01 # returning to user ? ++ jno .Lio_exit_kernel ++ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP + .Lio_exit_timer: + stpt __LC_EXIT_TIMER + mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER ++.Lio_exit_kernel: + lmg %r11,%r15,__PT_R11(%r11) + lpswe __LC_RETURN_PSW + .Lio_done: +@@ -748,6 +921,7 @@ ENTRY(io_int_handler) + ENTRY(ext_int_handler) + STCK __LC_INT_CLOCK + stpt __LC_ASYNC_ENTER_TIMER ++ BPOFF + stmg %r8,%r15,__LC_SAVE_AREA_ASYNC + lg %r10,__LC_LAST_BREAK + lg %r12,__LC_THREAD_INFO +@@ -755,6 +929,16 @@ ENTRY(ext_int_handler) + lmg %r8,%r9,__LC_EXT_OLD_PSW + SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER + stmg %r0,%r7,__PT_R0(%r11) ++ # clear user controlled registers to prevent speculative use ++ xgr %r0,%r0 ++ xgr %r1,%r1 ++ xgr %r2,%r2 ++ xgr %r3,%r3 ++ xgr %r4,%r4 ++ xgr %r5,%r5 ++ xgr %r6,%r6 ++ xgr %r7,%r7 ++ xgr %r10,%r10 + mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC + stmg %r8,%r9,__PT_PSW(%r11) + lghi %r1,__LC_EXT_PARAMS2 +@@ -787,11 +971,12 @@ ENTRY(psw_idle) + .Lpsw_idle_stcctm: + #endif + oi __LC_CPU_FLAGS+7,_CIF_ENABLED_WAIT ++ BPON + STCK __CLOCK_IDLE_ENTER(%r2) + stpt __TIMER_IDLE_ENTER(%r2) + .Lpsw_idle_lpsw: + lpswe __SF_EMPTY(%r15) +- br %r14 ++ BR_R1USE_R14 + .Lpsw_idle_end: + + /* +@@ -805,7 +990,7 @@ ENTRY(save_fpu_regs) + lg %r2,__LC_CURRENT + aghi %r2,__TASK_thread + TSTMSK __LC_CPU_FLAGS,_CIF_FPU +- bor %r14 ++ jo .Lsave_fpu_regs_exit + stfpc __THREAD_FPU_fpc(%r2) + .Lsave_fpu_regs_fpc_end: + lg %r3,__THREAD_FPU_regs(%r2) +@@ -835,7 +1020,8 @@ ENTRY(save_fpu_regs) + std 15,120(%r3) + .Lsave_fpu_regs_done: + oi __LC_CPU_FLAGS+7,_CIF_FPU +- br %r14 ++.Lsave_fpu_regs_exit: ++ BR_R1USE_R14 + .Lsave_fpu_regs_end: + #if IS_ENABLED(CONFIG_KVM) + EXPORT_SYMBOL(save_fpu_regs) +@@ -855,7 +1041,7 @@ load_fpu_regs: + lg %r4,__LC_CURRENT + aghi %r4,__TASK_thread + TSTMSK __LC_CPU_FLAGS,_CIF_FPU +- bnor %r14 ++ jno .Lload_fpu_regs_exit + lfpc __THREAD_FPU_fpc(%r4) + TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX + lg %r4,__THREAD_FPU_regs(%r4) # %r4 <- reg save area +@@ -884,7 +1070,8 @@ load_fpu_regs: + ld 15,120(%r4) + .Lload_fpu_regs_done: + ni __LC_CPU_FLAGS+7,255-_CIF_FPU +- br %r14 ++.Lload_fpu_regs_exit: ++ BR_R1USE_R14 + .Lload_fpu_regs_end: + + .L__critical_end: +@@ -894,6 +1081,7 @@ load_fpu_regs: + */ + ENTRY(mcck_int_handler) + STCK __LC_MCCK_CLOCK ++ BPOFF + la %r1,4095 # revalidate r1 + spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer + lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs +@@ -925,6 +1113,16 @@ ENTRY(mcck_int_handler) + .Lmcck_skip: + lghi %r14,__LC_GPREGS_SAVE_AREA+64 + stmg %r0,%r7,__PT_R0(%r11) ++ # clear user controlled registers to prevent speculative use ++ xgr %r0,%r0 ++ xgr %r1,%r1 ++ xgr %r2,%r2 ++ xgr %r3,%r3 ++ xgr %r4,%r4 ++ xgr %r5,%r5 ++ xgr %r6,%r6 ++ xgr %r7,%r7 ++ xgr %r10,%r10 + mvc __PT_R8(64,%r11),0(%r14) + stmg %r8,%r9,__PT_PSW(%r11) + xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) +@@ -950,6 +1148,7 @@ ENTRY(mcck_int_handler) + mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW + tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ? + jno 0f ++ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP + stpt __LC_EXIT_TIMER + mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER + 0: lmg %r11,%r15,__PT_R11(%r11) +@@ -1045,7 +1244,7 @@ cleanup_critical: + jl 0f + clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end + jl .Lcleanup_load_fpu_regs +-0: br %r14 ++0: BR_R11USE_R14 + + .align 8 + .Lcleanup_table: +@@ -1070,11 +1269,12 @@ cleanup_critical: + .quad .Lsie_done + + .Lcleanup_sie: ++ BPENTER __SF_EMPTY+24(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST) + lg %r9,__SF_EMPTY(%r15) # get control block pointer + ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE + lctlg %c1,%c1,__LC_USER_ASCE # load primary asce + larl %r9,sie_exit # skip forward to sie_exit +- br %r14 ++ BR_R11USE_R14 + #endif + + .Lcleanup_system_call: +@@ -1116,7 +1316,8 @@ cleanup_critical: + srag %r9,%r9,23 + jz 0f + mvc __TI_last_break(8,%r12),16(%r11) +-0: # set up saved register r11 ++0: BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP ++ # set up saved register r11 + lg %r15,__LC_KERNEL_STACK + la %r9,STACK_FRAME_OVERHEAD(%r15) + stg %r9,24(%r11) # r11 pt_regs pointer +@@ -1131,7 +1332,7 @@ cleanup_critical: + stg %r15,56(%r11) # r15 stack pointer + # set new psw address and exit + larl %r9,.Lsysc_do_svc +- br %r14 ++ BR_R11USE_R14 + .Lcleanup_system_call_insn: + .quad system_call + .quad .Lsysc_stmg +@@ -1141,7 +1342,7 @@ cleanup_critical: + + .Lcleanup_sysc_tif: + larl %r9,.Lsysc_tif +- br %r14 ++ BR_R11USE_R14 + + .Lcleanup_sysc_restore: + # check if stpt has been executed +@@ -1158,14 +1359,14 @@ cleanup_critical: + mvc 0(64,%r11),__PT_R8(%r9) + lmg %r0,%r7,__PT_R0(%r9) + 1: lmg %r8,%r9,__LC_RETURN_PSW +- br %r14 ++ BR_R11USE_R14 + .Lcleanup_sysc_restore_insn: + .quad .Lsysc_exit_timer + .quad .Lsysc_done - 4 + + .Lcleanup_io_tif: + larl %r9,.Lio_tif +- br %r14 ++ BR_R11USE_R14 + + .Lcleanup_io_restore: + # check if stpt has been executed +@@ -1179,7 +1380,7 @@ cleanup_critical: + mvc 0(64,%r11),__PT_R8(%r9) + lmg %r0,%r7,__PT_R0(%r9) + 1: lmg %r8,%r9,__LC_RETURN_PSW +- br %r14 ++ BR_R11USE_R14 + .Lcleanup_io_restore_insn: + .quad .Lio_exit_timer + .quad .Lio_done - 4 +@@ -1232,17 +1433,17 @@ cleanup_critical: + # prepare return psw + nihh %r8,0xfcfd # clear irq & wait state bits + lg %r9,48(%r11) # return from psw_idle +- br %r14 ++ BR_R11USE_R14 + .Lcleanup_idle_insn: + .quad .Lpsw_idle_lpsw + + .Lcleanup_save_fpu_regs: + larl %r9,save_fpu_regs +- br %r14 ++ BR_R11USE_R14 + + .Lcleanup_load_fpu_regs: + larl %r9,load_fpu_regs +- br %r14 ++ BR_R11USE_R14 + + /* + * Integer constants +@@ -1258,7 +1459,6 @@ cleanup_critical: + .Lsie_critical_length: + .quad .Lsie_done - .Lsie_gmap + #endif +- + .section .rodata, "a" + #define SYSCALL(esame,emu) .long esame + .globl sys_call_table +diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c +index 39127b691b78..df49f2a1a7e5 100644 +--- a/arch/s390/kernel/ipl.c ++++ b/arch/s390/kernel/ipl.c +@@ -563,6 +563,7 @@ static struct kset *ipl_kset; + + static void __ipl_run(void *unused) + { ++ __bpon(); + diag308(DIAG308_LOAD_CLEAR, NULL); + if (MACHINE_IS_VM) + __cpcmd("IPL", NULL, 0, NULL); +diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c +index fbc07891f9e7..64ccfdf96b32 100644 +--- a/arch/s390/kernel/module.c ++++ b/arch/s390/kernel/module.c +@@ -31,6 +31,9 @@ + #include <linux/kernel.h> + #include <linux/moduleloader.h> + #include <linux/bug.h> ++#include <asm/alternative.h> ++#include <asm/nospec-branch.h> ++#include <asm/facility.h> + + #if 0 + #define DEBUGP printk +@@ -167,7 +170,11 @@ int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, + me->arch.got_offset = me->core_layout.size; + me->core_layout.size += me->arch.got_size; + me->arch.plt_offset = me->core_layout.size; +- me->core_layout.size += me->arch.plt_size; ++ if (me->arch.plt_size) { ++ if (IS_ENABLED(CONFIG_EXPOLINE) && !nospec_disable) ++ me->arch.plt_size += PLT_ENTRY_SIZE; ++ me->core_layout.size += me->arch.plt_size; ++ } + return 0; + } + +@@ -321,9 +328,20 @@ static int apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab, + unsigned int *ip; + ip = me->core_layout.base + me->arch.plt_offset + + info->plt_offset; +- ip[0] = 0x0d10e310; /* basr 1,0; lg 1,10(1); br 1 */ +- ip[1] = 0x100a0004; +- ip[2] = 0x07f10000; ++ ip[0] = 0x0d10e310; /* basr 1,0 */ ++ ip[1] = 0x100a0004; /* lg 1,10(1) */ ++ if (IS_ENABLED(CONFIG_EXPOLINE) && !nospec_disable) { ++ unsigned int *ij; ++ ij = me->core_layout.base + ++ me->arch.plt_offset + ++ me->arch.plt_size - PLT_ENTRY_SIZE; ++ ip[2] = 0xa7f40000 + /* j __jump_r1 */ ++ (unsigned int)(u16) ++ (((unsigned long) ij - 8 - ++ (unsigned long) ip) / 2); ++ } else { ++ ip[2] = 0x07f10000; /* br %r1 */ ++ } + ip[3] = (unsigned int) (val >> 32); + ip[4] = (unsigned int) val; + info->plt_initialized = 1; +@@ -428,6 +446,45 @@ int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *me) + { ++ const Elf_Shdr *s; ++ char *secstrings, *secname; ++ void *aseg; ++ ++ if (IS_ENABLED(CONFIG_EXPOLINE) && ++ !nospec_disable && me->arch.plt_size) { ++ unsigned int *ij; ++ ++ ij = me->core_layout.base + me->arch.plt_offset + ++ me->arch.plt_size - PLT_ENTRY_SIZE; ++ if (test_facility(35)) { ++ ij[0] = 0xc6000000; /* exrl %r0,.+10 */ ++ ij[1] = 0x0005a7f4; /* j . */ ++ ij[2] = 0x000007f1; /* br %r1 */ ++ } else { ++ ij[0] = 0x44000000 | (unsigned int) ++ offsetof(struct lowcore, br_r1_trampoline); ++ ij[1] = 0xa7f40000; /* j . */ ++ } ++ } ++ ++ secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; ++ for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { ++ aseg = (void *) s->sh_addr; ++ secname = secstrings + s->sh_name; ++ ++ if (!strcmp(".altinstructions", secname)) ++ /* patch .altinstructions */ ++ apply_alternatives(aseg, aseg + s->sh_size); ++ ++ if (IS_ENABLED(CONFIG_EXPOLINE) && ++ (!strncmp(".s390_indirect", secname, 14))) ++ nospec_revert(aseg, aseg + s->sh_size); ++ ++ if (IS_ENABLED(CONFIG_EXPOLINE) && ++ (!strncmp(".s390_return", secname, 12))) ++ nospec_revert(aseg, aseg + s->sh_size); ++ } ++ + jump_label_apply_nops(me); + return 0; + } +diff --git a/arch/s390/kernel/nospec-branch.c b/arch/s390/kernel/nospec-branch.c +new file mode 100644 +index 000000000000..9f3b5b382743 +--- /dev/null ++++ b/arch/s390/kernel/nospec-branch.c +@@ -0,0 +1,169 @@ ++// SPDX-License-Identifier: GPL-2.0 ++#include <linux/module.h> ++#include <linux/device.h> ++#include <asm/facility.h> ++#include <asm/nospec-branch.h> ++ ++static int __init nobp_setup_early(char *str) ++{ ++ bool enabled; ++ int rc; ++ ++ rc = kstrtobool(str, &enabled); ++ if (rc) ++ return rc; ++ if (enabled && test_facility(82)) { ++ /* ++ * The user explicitely requested nobp=1, enable it and ++ * disable the expoline support. ++ */ ++ __set_facility(82, S390_lowcore.alt_stfle_fac_list); ++ if (IS_ENABLED(CONFIG_EXPOLINE)) ++ nospec_disable = 1; ++ } else { ++ __clear_facility(82, S390_lowcore.alt_stfle_fac_list); ++ } ++ return 0; ++} ++early_param("nobp", nobp_setup_early); ++ ++static int __init nospec_setup_early(char *str) ++{ ++ __clear_facility(82, S390_lowcore.alt_stfle_fac_list); ++ return 0; ++} ++early_param("nospec", nospec_setup_early); ++ ++static int __init nospec_report(void) ++{ ++ if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable) ++ pr_info("Spectre V2 mitigation: execute trampolines.\n"); ++ if (__test_facility(82, S390_lowcore.alt_stfle_fac_list)) ++ pr_info("Spectre V2 mitigation: limited branch prediction.\n"); ++ return 0; ++} ++arch_initcall(nospec_report); ++ ++#ifdef CONFIG_SYSFS ++ssize_t cpu_show_spectre_v1(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ return sprintf(buf, "Mitigation: __user pointer sanitization\n"); ++} ++ ++ssize_t cpu_show_spectre_v2(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable) ++ return sprintf(buf, "Mitigation: execute trampolines\n"); ++ if (__test_facility(82, S390_lowcore.alt_stfle_fac_list)) ++ return sprintf(buf, "Mitigation: limited branch prediction.\n"); ++ return sprintf(buf, "Vulnerable\n"); ++} ++#endif ++ ++#ifdef CONFIG_EXPOLINE ++ ++int nospec_disable = IS_ENABLED(CONFIG_EXPOLINE_OFF); ++ ++static int __init nospectre_v2_setup_early(char *str) ++{ ++ nospec_disable = 1; ++ return 0; ++} ++early_param("nospectre_v2", nospectre_v2_setup_early); ++ ++void __init nospec_auto_detect(void) ++{ ++ if (IS_ENABLED(CC_USING_EXPOLINE)) { ++ /* ++ * The kernel has been compiled with expolines. ++ * Keep expolines enabled and disable nobp. ++ */ ++ nospec_disable = 0; ++ __clear_facility(82, S390_lowcore.alt_stfle_fac_list); ++ } ++ /* ++ * If the kernel has not been compiled with expolines the ++ * nobp setting decides what is done, this depends on the ++ * CONFIG_KERNEL_NP option and the nobp/nospec parameters. ++ */ ++} ++ ++static int __init spectre_v2_setup_early(char *str) ++{ ++ if (str && !strncmp(str, "on", 2)) { ++ nospec_disable = 0; ++ __clear_facility(82, S390_lowcore.alt_stfle_fac_list); ++ } ++ if (str && !strncmp(str, "off", 3)) ++ nospec_disable = 1; ++ if (str && !strncmp(str, "auto", 4)) ++ nospec_auto_detect(); ++ return 0; ++} ++early_param("spectre_v2", spectre_v2_setup_early); ++ ++static void __init_or_module __nospec_revert(s32 *start, s32 *end) ++{ ++ enum { BRCL_EXPOLINE, BRASL_EXPOLINE } type; ++ u8 *instr, *thunk, *br; ++ u8 insnbuf[6]; ++ s32 *epo; ++ ++ /* Second part of the instruction replace is always a nop */ ++ memcpy(insnbuf + 2, (char[]) { 0x47, 0x00, 0x00, 0x00 }, 4); ++ for (epo = start; epo < end; epo++) { ++ instr = (u8 *) epo + *epo; ++ if (instr[0] == 0xc0 && (instr[1] & 0x0f) == 0x04) ++ type = BRCL_EXPOLINE; /* brcl instruction */ ++ else if (instr[0] == 0xc0 && (instr[1] & 0x0f) == 0x05) ++ type = BRASL_EXPOLINE; /* brasl instruction */ ++ else ++ continue; ++ thunk = instr + (*(int *)(instr + 2)) * 2; ++ if (thunk[0] == 0xc6 && thunk[1] == 0x00) ++ /* exrl %r0,<target-br> */ ++ br = thunk + (*(int *)(thunk + 2)) * 2; ++ else if (thunk[0] == 0xc0 && (thunk[1] & 0x0f) == 0x00 && ++ thunk[6] == 0x44 && thunk[7] == 0x00 && ++ (thunk[8] & 0x0f) == 0x00 && thunk[9] == 0x00 && ++ (thunk[1] & 0xf0) == (thunk[8] & 0xf0)) ++ /* larl %rx,<target br> + ex %r0,0(%rx) */ ++ br = thunk + (*(int *)(thunk + 2)) * 2; ++ else ++ continue; ++ if (br[0] != 0x07 || (br[1] & 0xf0) != 0xf0) ++ continue; ++ switch (type) { ++ case BRCL_EXPOLINE: ++ /* brcl to thunk, replace with br + nop */ ++ insnbuf[0] = br[0]; ++ insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f); ++ break; ++ case BRASL_EXPOLINE: ++ /* brasl to thunk, replace with basr + nop */ ++ insnbuf[0] = 0x0d; ++ insnbuf[1] = (instr[1] & 0xf0) | (br[1] & 0x0f); ++ break; ++ } ++ ++ s390_kernel_write(instr, insnbuf, 6); ++ } ++} ++ ++void __init_or_module nospec_revert(s32 *start, s32 *end) ++{ ++ if (nospec_disable) ++ __nospec_revert(start, end); ++} ++ ++extern s32 __nospec_call_start[], __nospec_call_end[]; ++extern s32 __nospec_return_start[], __nospec_return_end[]; ++void __init nospec_init_branches(void) ++{ ++ nospec_revert(__nospec_call_start, __nospec_call_end); ++ nospec_revert(__nospec_return_start, __nospec_return_end); ++} ++ ++#endif /* CONFIG_EXPOLINE */ +diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c +index 81d0808085e6..d856263fd768 100644 +--- a/arch/s390/kernel/processor.c ++++ b/arch/s390/kernel/processor.c +@@ -179,3 +179,21 @@ const struct seq_operations cpuinfo_op = { + .stop = c_stop, + .show = show_cpuinfo, + }; ++ ++int s390_isolate_bp(void) ++{ ++ if (!test_facility(82)) ++ return -EOPNOTSUPP; ++ set_thread_flag(TIF_ISOLATE_BP); ++ return 0; ++} ++EXPORT_SYMBOL(s390_isolate_bp); ++ ++int s390_isolate_bp_guest(void) ++{ ++ if (!test_facility(82)) ++ return -EOPNOTSUPP; ++ set_thread_flag(TIF_ISOLATE_BP_GUEST); ++ return 0; ++} ++EXPORT_SYMBOL(s390_isolate_bp_guest); +diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c +index e974e53ab597..feb9d97a9d14 100644 +--- a/arch/s390/kernel/setup.c ++++ b/arch/s390/kernel/setup.c +@@ -63,6 +63,8 @@ + #include <asm/sclp.h> + #include <asm/sysinfo.h> + #include <asm/numa.h> ++#include <asm/alternative.h> ++#include <asm/nospec-branch.h> + #include "entry.h" + + /* +@@ -335,7 +337,9 @@ static void __init setup_lowcore(void) + lc->machine_flags = S390_lowcore.machine_flags; + lc->stfl_fac_list = S390_lowcore.stfl_fac_list; + memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, +- MAX_FACILITY_BIT/8); ++ sizeof(lc->stfle_fac_list)); ++ memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list, ++ sizeof(lc->alt_stfle_fac_list)); + if (MACHINE_HAS_VX) + lc->vector_save_area_addr = + (unsigned long) &lc->vector_save_area; +@@ -372,6 +376,7 @@ static void __init setup_lowcore(void) + #ifdef CONFIG_SMP + lc->spinlock_lockval = arch_spin_lockval(0); + #endif ++ lc->br_r1_trampoline = 0x07f1; /* br %r1 */ + + set_prefix((u32)(unsigned long) lc); + lowcore_ptr[0] = lc; +@@ -871,6 +876,9 @@ void __init setup_arch(char **cmdline_p) + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) &_end; + ++ if (IS_ENABLED(CONFIG_EXPOLINE_AUTO)) ++ nospec_auto_detect(); ++ + parse_early_param(); + #ifdef CONFIG_CRASH_DUMP + /* Deactivate elfcorehdr= kernel parameter */ +@@ -931,6 +939,10 @@ void __init setup_arch(char **cmdline_p) + conmode_default(); + set_preferred_console(); + ++ apply_alternative_instructions(); ++ if (IS_ENABLED(CONFIG_EXPOLINE)) ++ nospec_init_branches(); ++ + /* Setup zfcpdump support */ + setup_zfcpdump(); + +diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c +index 35531fe1c5ea..0a31110f41f6 100644 +--- a/arch/s390/kernel/smp.c ++++ b/arch/s390/kernel/smp.c +@@ -205,6 +205,7 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) + lc->panic_stack = panic_stack + PANIC_FRAME_OFFSET; + lc->cpu_nr = cpu; + lc->spinlock_lockval = arch_spin_lockval(cpu); ++ lc->br_r1_trampoline = 0x07f1; /* br %r1 */ + if (MACHINE_HAS_VX) + lc->vector_save_area_addr = + (unsigned long) &lc->vector_save_area; +@@ -253,7 +254,9 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) + __ctl_store(lc->cregs_save_area, 0, 15); + save_access_regs((unsigned int *) lc->access_regs_save_area); + memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, +- MAX_FACILITY_BIT/8); ++ sizeof(lc->stfle_fac_list)); ++ memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list, ++ sizeof(lc->alt_stfle_fac_list)); + } + + static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk) +@@ -302,6 +305,7 @@ static void pcpu_delegate(struct pcpu *pcpu, void (*func)(void *), + mem_assign_absolute(lc->restart_fn, (unsigned long) func); + mem_assign_absolute(lc->restart_data, (unsigned long) data); + mem_assign_absolute(lc->restart_source, source_cpu); ++ __bpon(); + asm volatile( + "0: sigp 0,%0,%2 # sigp restart to target cpu\n" + " brc 2,0b # busy, try again\n" +@@ -875,6 +879,7 @@ void __cpu_die(unsigned int cpu) + void __noreturn cpu_die(void) + { + idle_task_exit(); ++ __bpon(); + pcpu_sigp_retry(pcpu_devices + smp_processor_id(), SIGP_STOP, 0); + for (;;) ; + } +diff --git a/arch/s390/kernel/uprobes.c b/arch/s390/kernel/uprobes.c +index 66956c09d5bf..3d04dfdabc9f 100644 +--- a/arch/s390/kernel/uprobes.c ++++ b/arch/s390/kernel/uprobes.c +@@ -147,6 +147,15 @@ unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline, + return orig; + } + ++bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, ++ struct pt_regs *regs) ++{ ++ if (ctx == RP_CHECK_CHAIN_CALL) ++ return user_stack_pointer(regs) <= ret->stack; ++ else ++ return user_stack_pointer(regs) < ret->stack; ++} ++ + /* Instruction Emulation */ + + static void adjust_psw_addr(psw_t *psw, unsigned long len) +diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S +index 115bda280d50..dd96b467946b 100644 +--- a/arch/s390/kernel/vmlinux.lds.S ++++ b/arch/s390/kernel/vmlinux.lds.S +@@ -99,6 +99,43 @@ SECTIONS + EXIT_DATA + } + ++ /* ++ * struct alt_inst entries. From the header (alternative.h): ++ * "Alternative instructions for different CPU types or capabilities" ++ * Think locking instructions on spinlocks. ++ * Note, that it is a part of __init region. ++ */ ++ . = ALIGN(8); ++ .altinstructions : { ++ __alt_instructions = .; ++ *(.altinstructions) ++ __alt_instructions_end = .; ++ } ++ ++ /* ++ * And here are the replacement instructions. The linker sticks ++ * them as binary blobs. The .altinstructions has enough data to ++ * get the address and the length of them to patch the kernel safely. ++ * Note, that it is a part of __init region. ++ */ ++ .altinstr_replacement : { ++ *(.altinstr_replacement) ++ } ++ ++ /* ++ * Table with the patch locations to undo expolines ++ */ ++ .nospec_call_table : { ++ __nospec_call_start = . ; ++ *(.s390_indirect*) ++ __nospec_call_end = . ; ++ } ++ .nospec_return_table : { ++ __nospec_return_start = . ; ++ *(.s390_return*) ++ __nospec_return_end = . ; ++ } ++ + /* early.c uses stsi, which requires page aligned data. */ + . = ALIGN(PAGE_SIZE); + INIT_DATA_SECTION(0x100) +diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c +index a70ff09b4982..2032ab81b2d7 100644 +--- a/arch/s390/kvm/kvm-s390.c ++++ b/arch/s390/kvm/kvm-s390.c +@@ -401,6 +401,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) + case KVM_CAP_S390_RI: + r = test_facility(64); + break; ++ case KVM_CAP_S390_BPB: ++ r = test_facility(82); ++ break; + default: + r = 0; + } +@@ -1713,6 +1716,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) + kvm_s390_set_prefix(vcpu, 0); + if (test_kvm_facility(vcpu->kvm, 64)) + vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; ++ if (test_kvm_facility(vcpu->kvm, 82)) ++ vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC; + /* fprs can be synchronized via vrs, even if the guest has no vx. With + * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. + */ +@@ -1829,7 +1834,6 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) + if (test_fp_ctl(current->thread.fpu.fpc)) + /* User space provided an invalid FPC, let's clear it */ + current->thread.fpu.fpc = 0; +- + save_access_regs(vcpu->arch.host_acrs); + restore_access_regs(vcpu->run->s.regs.acrs); + gmap_enable(vcpu->arch.enabled_gmap); +@@ -1877,6 +1881,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) + current->thread.fpu.fpc = 0; + vcpu->arch.sie_block->gbea = 1; + vcpu->arch.sie_block->pp = 0; ++ vcpu->arch.sie_block->fpf &= ~FPF_BPBC; + vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; + kvm_clear_async_pf_completion_queue(vcpu); + if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) +@@ -2744,6 +2749,11 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) + if (riccb->valid) + vcpu->arch.sie_block->ecb3 |= 0x01; + } ++ if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) && ++ test_kvm_facility(vcpu->kvm, 82)) { ++ vcpu->arch.sie_block->fpf &= ~FPF_BPBC; ++ vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0; ++ } + + kvm_run->kvm_dirty_regs = 0; + } +@@ -2762,6 +2772,7 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) + kvm_run->s.regs.pft = vcpu->arch.pfault_token; + kvm_run->s.regs.pfs = vcpu->arch.pfault_select; + kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; ++ kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC; + } + + int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c +index d8673e243f13..ced6c9b8f04d 100644 +--- a/arch/s390/kvm/vsie.c ++++ b/arch/s390/kvm/vsie.c +@@ -217,6 +217,12 @@ static void unshadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + memcpy(scb_o->gcr, scb_s->gcr, 128); + scb_o->pp = scb_s->pp; + ++ /* branch prediction */ ++ if (test_kvm_facility(vcpu->kvm, 82)) { ++ scb_o->fpf &= ~FPF_BPBC; ++ scb_o->fpf |= scb_s->fpf & FPF_BPBC; ++ } ++ + /* interrupt intercept */ + switch (scb_s->icptcode) { + case ICPT_PROGI: +@@ -259,6 +265,7 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + scb_s->ecb3 = 0; + scb_s->ecd = 0; + scb_s->fac = 0; ++ scb_s->fpf = 0; + + rc = prepare_cpuflags(vcpu, vsie_page); + if (rc) +@@ -316,6 +323,9 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + prefix_unmapped(vsie_page); + scb_s->ecb |= scb_o->ecb & 0x10U; + } ++ /* branch prediction */ ++ if (test_kvm_facility(vcpu->kvm, 82)) ++ scb_s->fpf |= scb_o->fpf & FPF_BPBC; + /* SIMD */ + if (test_kvm_facility(vcpu->kvm, 129)) { + scb_s->eca |= scb_o->eca & 0x00020000U; +@@ -754,6 +764,7 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + { + struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s; + struct kvm_s390_sie_block *scb_o = vsie_page->scb_o; ++ int guest_bp_isolation; + int rc; + + handle_last_fault(vcpu, vsie_page); +@@ -764,6 +775,20 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + s390_handle_mcck(); + + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); ++ ++ /* save current guest state of bp isolation override */ ++ guest_bp_isolation = test_thread_flag(TIF_ISOLATE_BP_GUEST); ++ ++ /* ++ * The guest is running with BPBC, so we have to force it on for our ++ * nested guest. This is done by enabling BPBC globally, so the BPBC ++ * control in the SCB (which the nested guest can modify) is simply ++ * ignored. ++ */ ++ if (test_kvm_facility(vcpu->kvm, 82) && ++ vcpu->arch.sie_block->fpf & FPF_BPBC) ++ set_thread_flag(TIF_ISOLATE_BP_GUEST); ++ + local_irq_disable(); + guest_enter_irqoff(); + local_irq_enable(); +@@ -773,6 +798,11 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) + local_irq_disable(); + guest_exit_irqoff(); + local_irq_enable(); ++ ++ /* restore guest state for bp isolation override */ ++ if (!guest_bp_isolation) ++ clear_thread_flag(TIF_ISOLATE_BP_GUEST); ++ + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + + if (rc > 0) +diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c +index bbfb03eccb7f..da6a287a11e4 100644 +--- a/arch/x86/kernel/tsc.c ++++ b/arch/x86/kernel/tsc.c +@@ -409,7 +409,7 @@ static unsigned long calc_hpet_ref(u64 deltatsc, u64 hpet1, u64 hpet2) + hpet2 -= hpet1; + tmp = ((u64)hpet2 * hpet_readl(HPET_PERIOD)); + do_div(tmp, 1000000); +- do_div(deltatsc, tmp); ++ deltatsc = div64_u64(deltatsc, tmp); + + return (unsigned long) deltatsc; + } +diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c +index 94e04c9de12b..667dc5c86fef 100644 +--- a/drivers/acpi/acpi_video.c ++++ b/drivers/acpi/acpi_video.c +@@ -2069,6 +2069,25 @@ static int __init intel_opregion_present(void) + return opregion; + } + ++static bool dmi_is_desktop(void) ++{ ++ const char *chassis_type; ++ ++ chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); ++ if (!chassis_type) ++ return false; ++ ++ if (!strcmp(chassis_type, "3") || /* 3: Desktop */ ++ !strcmp(chassis_type, "4") || /* 4: Low Profile Desktop */ ++ !strcmp(chassis_type, "5") || /* 5: Pizza Box */ ++ !strcmp(chassis_type, "6") || /* 6: Mini Tower */ ++ !strcmp(chassis_type, "7") || /* 7: Tower */ ++ !strcmp(chassis_type, "11")) /* 11: Main Server Chassis */ ++ return true; ++ ++ return false; ++} ++ + int acpi_video_register(void) + { + int ret = 0; +@@ -2089,8 +2108,12 @@ int acpi_video_register(void) + * win8 ready (where we also prefer the native backlight driver, so + * normally the acpi_video code should not register there anyways). + */ +- if (only_lcd == -1) +- only_lcd = acpi_osi_is_win8(); ++ if (only_lcd == -1) { ++ if (dmi_is_desktop() && acpi_osi_is_win8()) ++ only_lcd = true; ++ else ++ only_lcd = false; ++ } + + dmi_check_system(video_dmi_table); + +diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c +index 5d475b3a0b2e..128ebd439221 100644 +--- a/drivers/cdrom/cdrom.c ++++ b/drivers/cdrom/cdrom.c +@@ -2368,7 +2368,7 @@ static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, + if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) + return media_changed(cdi, 1); + +- if ((unsigned int)arg >= cdi->capacity) ++ if (arg >= cdi->capacity) + return -EINVAL; + + info = kmalloc(sizeof(*info), GFP_KERNEL); +diff --git a/drivers/gpu/drm/drm_dp_dual_mode_helper.c b/drivers/gpu/drm/drm_dp_dual_mode_helper.c +index a7b2a751f6fe..cdb53586c8fe 100644 +--- a/drivers/gpu/drm/drm_dp_dual_mode_helper.c ++++ b/drivers/gpu/drm/drm_dp_dual_mode_helper.c +@@ -322,19 +322,44 @@ int drm_dp_dual_mode_set_tmds_output(enum drm_dp_dual_mode_type type, + { + uint8_t tmds_oen = enable ? 0 : DP_DUAL_MODE_TMDS_DISABLE; + ssize_t ret; ++ int retry; + + if (type < DRM_DP_DUAL_MODE_TYPE2_DVI) + return 0; + +- ret = drm_dp_dual_mode_write(adapter, DP_DUAL_MODE_TMDS_OEN, +- &tmds_oen, sizeof(tmds_oen)); +- if (ret) { +- DRM_DEBUG_KMS("Failed to %s TMDS output buffers\n", +- enable ? "enable" : "disable"); +- return ret; ++ /* ++ * LSPCON adapters in low-power state may ignore the first write, so ++ * read back and verify the written value a few times. ++ */ ++ for (retry = 0; retry < 3; retry++) { ++ uint8_t tmp; ++ ++ ret = drm_dp_dual_mode_write(adapter, DP_DUAL_MODE_TMDS_OEN, ++ &tmds_oen, sizeof(tmds_oen)); ++ if (ret) { ++ DRM_DEBUG_KMS("Failed to %s TMDS output buffers (%d attempts)\n", ++ enable ? "enable" : "disable", ++ retry + 1); ++ return ret; ++ } ++ ++ ret = drm_dp_dual_mode_read(adapter, DP_DUAL_MODE_TMDS_OEN, ++ &tmp, sizeof(tmp)); ++ if (ret) { ++ DRM_DEBUG_KMS("I2C read failed during TMDS output buffer %s (%d attempts)\n", ++ enable ? "enabling" : "disabling", ++ retry + 1); ++ return ret; ++ } ++ ++ if (tmp == tmds_oen) ++ return 0; + } + +- return 0; ++ DRM_DEBUG_KMS("I2C write value mismatch during TMDS output buffer %s\n", ++ enable ? "enabling" : "disabling"); ++ ++ return -EIO; + } + EXPORT_SYMBOL(drm_dp_dual_mode_set_tmds_output); + +diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h +index 36a665f0e5c9..e23748cca0c0 100644 +--- a/drivers/gpu/drm/i915/i915_drv.h ++++ b/drivers/gpu/drm/i915/i915_drv.h +@@ -3681,7 +3681,11 @@ extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e, + struct intel_display_error_state *error); + + int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val); +-int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u32 mbox, u32 val); ++int sandybridge_pcode_write_timeout(struct drm_i915_private *dev_priv, u32 mbox, ++ u32 val, int timeout_us); ++#define sandybridge_pcode_write(dev_priv, mbox, val) \ ++ sandybridge_pcode_write_timeout(dev_priv, mbox, val, 500) ++ + int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request, + u32 reply_mask, u32 reply, int timeout_base_ms); + +diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c +index ce32303b3013..c185625d67f2 100644 +--- a/drivers/gpu/drm/i915/intel_display.c ++++ b/drivers/gpu/drm/i915/intel_display.c +@@ -6012,8 +6012,8 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv, int cdclk) + + /* Inform power controller of upcoming frequency change */ + mutex_lock(&dev_priv->rps.hw_lock); +- ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, +- 0x80000000); ++ ret = sandybridge_pcode_write_timeout(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, ++ 0x80000000, 2000); + mutex_unlock(&dev_priv->rps.hw_lock); + + if (ret) { +@@ -6044,8 +6044,9 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv, int cdclk) + I915_WRITE(CDCLK_CTL, val); + + mutex_lock(&dev_priv->rps.hw_lock); +- ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, +- DIV_ROUND_UP(cdclk, 25000)); ++ ret = sandybridge_pcode_write_timeout(dev_priv, ++ HSW_PCODE_DE_WRITE_FREQ_REQ, ++ DIV_ROUND_UP(cdclk, 25000), 2000); + mutex_unlock(&dev_priv->rps.hw_lock); + + if (ret) { +diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c +index 49de4760cc16..05427d292457 100644 +--- a/drivers/gpu/drm/i915/intel_pm.c ++++ b/drivers/gpu/drm/i915/intel_pm.c +@@ -7913,8 +7913,8 @@ int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val + return 0; + } + +-int sandybridge_pcode_write(struct drm_i915_private *dev_priv, +- u32 mbox, u32 val) ++int sandybridge_pcode_write_timeout(struct drm_i915_private *dev_priv, ++ u32 mbox, u32 val, int timeout_us) + { + int status; + +@@ -7935,7 +7935,7 @@ int sandybridge_pcode_write(struct drm_i915_private *dev_priv, + + if (intel_wait_for_register_fw(dev_priv, + GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0, +- 500)) { ++ timeout_us)) { + DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox); + return -ETIMEDOUT; + } +diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c +index ec9023bd935b..d53e805d392f 100644 +--- a/drivers/gpu/drm/vc4/vc4_bo.c ++++ b/drivers/gpu/drm/vc4/vc4_bo.c +@@ -80,6 +80,7 @@ static void vc4_bo_destroy(struct vc4_bo *bo) + struct vc4_dev *vc4 = to_vc4_dev(obj->dev); + + if (bo->validated_shader) { ++ kfree(bo->validated_shader->uniform_addr_offsets); + kfree(bo->validated_shader->texture_samples); + kfree(bo->validated_shader); + bo->validated_shader = NULL; +@@ -328,6 +329,7 @@ void vc4_free_object(struct drm_gem_object *gem_bo) + } + + if (bo->validated_shader) { ++ kfree(bo->validated_shader->uniform_addr_offsets); + kfree(bo->validated_shader->texture_samples); + kfree(bo->validated_shader); + bo->validated_shader = NULL; +diff --git a/drivers/gpu/drm/vc4/vc4_validate_shaders.c b/drivers/gpu/drm/vc4/vc4_validate_shaders.c +index 917321ce832f..19a5bde8e490 100644 +--- a/drivers/gpu/drm/vc4/vc4_validate_shaders.c ++++ b/drivers/gpu/drm/vc4/vc4_validate_shaders.c +@@ -874,6 +874,7 @@ vc4_validate_shader(struct drm_gem_cma_object *shader_obj) + fail: + kfree(validation_state.branch_targets); + if (validated_shader) { ++ kfree(validated_shader->uniform_addr_offsets); + kfree(validated_shader->texture_samples); + kfree(validated_shader); + } +diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c +index e6fe21a6135b..b32bf7eac3c8 100644 +--- a/drivers/i2c/busses/i2c-i801.c ++++ b/drivers/i2c/busses/i2c-i801.c +@@ -243,6 +243,7 @@ struct i801_priv { + struct i2c_adapter adapter; + unsigned long smba; + unsigned char original_hstcfg; ++ unsigned char original_slvcmd; + struct pci_dev *pci_dev; + unsigned int features; + +@@ -962,13 +963,24 @@ static int i801_enable_host_notify(struct i2c_adapter *adapter) + if (!priv->host_notify) + return -ENOMEM; + +- outb_p(SMBSLVCMD_HST_NTFY_INTREN, SMBSLVCMD(priv)); ++ if (!(SMBSLVCMD_HST_NTFY_INTREN & priv->original_slvcmd)) ++ outb_p(SMBSLVCMD_HST_NTFY_INTREN | priv->original_slvcmd, ++ SMBSLVCMD(priv)); ++ + /* clear Host Notify bit to allow a new notification */ + outb_p(SMBSLVSTS_HST_NTFY_STS, SMBSLVSTS(priv)); + + return 0; + } + ++static void i801_disable_host_notify(struct i801_priv *priv) ++{ ++ if (!(priv->features & FEATURE_HOST_NOTIFY)) ++ return; ++ ++ outb_p(priv->original_slvcmd, SMBSLVCMD(priv)); ++} ++ + static const struct i2c_algorithm smbus_algorithm = { + .smbus_xfer = i801_access, + .functionality = i801_func, +@@ -1589,6 +1601,10 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) + outb_p(inb_p(SMBAUXCTL(priv)) & + ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv)); + ++ /* Remember original Host Notify setting */ ++ if (priv->features & FEATURE_HOST_NOTIFY) ++ priv->original_slvcmd = inb_p(SMBSLVCMD(priv)); ++ + /* Default timeout in interrupt mode: 200 ms */ + priv->adapter.timeout = HZ / 5; + +@@ -1666,6 +1682,7 @@ static void i801_remove(struct pci_dev *dev) + pm_runtime_forbid(&dev->dev); + pm_runtime_get_noresume(&dev->dev); + ++ i801_disable_host_notify(priv); + i801_del_mux(priv); + i2c_del_adapter(&priv->adapter); + i801_acpi_remove(priv); +@@ -1679,6 +1696,15 @@ static void i801_remove(struct pci_dev *dev) + */ + } + ++static void i801_shutdown(struct pci_dev *dev) ++{ ++ struct i801_priv *priv = pci_get_drvdata(dev); ++ ++ /* Restore config registers to avoid hard hang on some systems */ ++ i801_disable_host_notify(priv); ++ pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); ++} ++ + #ifdef CONFIG_PM + static int i801_suspend(struct device *dev) + { +@@ -1711,6 +1737,7 @@ static struct pci_driver i801_driver = { + .id_table = i801_ids, + .probe = i801_probe, + .remove = i801_remove, ++ .shutdown = i801_shutdown, + .driver = { + .pm = &i801_pm_ops, + }, +diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c +index 403df3591d29..5b8909d1b55e 100644 +--- a/drivers/infiniband/hw/mlx5/qp.c ++++ b/drivers/infiniband/hw/mlx5/qp.c +@@ -2848,7 +2848,8 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp, + * If we moved a kernel QP to RESET, clean up all old CQ + * entries and reinitialize the QP. + */ +- if (new_state == IB_QPS_RESET && !ibqp->uobject) { ++ if (new_state == IB_QPS_RESET && ++ !ibqp->uobject && ibqp->qp_type != IB_QPT_XRC_TGT) { + mlx5_ib_cq_clean(recv_cq, base->mqp.qpn, + ibqp->srq ? to_msrq(ibqp->srq) : NULL); + if (send_cq != recv_cq) +diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c +index 930424e55439..251d64ca41ce 100644 +--- a/drivers/input/misc/drv260x.c ++++ b/drivers/input/misc/drv260x.c +@@ -521,7 +521,7 @@ static int drv260x_probe(struct i2c_client *client, + if (!haptics) + return -ENOMEM; + +- haptics->rated_voltage = DRV260X_DEF_OD_CLAMP_VOLT; ++ haptics->overdrive_voltage = DRV260X_DEF_OD_CLAMP_VOLT; + haptics->rated_voltage = DRV260X_DEF_RATED_VOLT; + + if (pdata) { +diff --git a/drivers/media/usb/stkwebcam/stk-sensor.c b/drivers/media/usb/stkwebcam/stk-sensor.c +index e546b014d7ad..2dcc8d0be9e7 100644 +--- a/drivers/media/usb/stkwebcam/stk-sensor.c ++++ b/drivers/media/usb/stkwebcam/stk-sensor.c +@@ -228,7 +228,7 @@ + static int stk_sensor_outb(struct stk_camera *dev, u8 reg, u8 val) + { + int i = 0; +- int tmpval = 0; ++ u8 tmpval = 0; + + if (stk_camera_write_reg(dev, STK_IIC_TX_INDEX, reg)) + return 1; +@@ -253,7 +253,7 @@ static int stk_sensor_outb(struct stk_camera *dev, u8 reg, u8 val) + static int stk_sensor_inb(struct stk_camera *dev, u8 reg, u8 *val) + { + int i = 0; +- int tmpval = 0; ++ u8 tmpval = 0; + + if (stk_camera_write_reg(dev, STK_IIC_RX_INDEX, reg)) + return 1; +@@ -274,7 +274,7 @@ static int stk_sensor_inb(struct stk_camera *dev, u8 reg, u8 *val) + if (stk_camera_read_reg(dev, STK_IIC_RX_VALUE, &tmpval)) + return 1; + +- *val = (u8) tmpval; ++ *val = tmpval; + return 0; + } + +diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c +index 22a9aae16291..1c48f2f1e14a 100644 +--- a/drivers/media/usb/stkwebcam/stk-webcam.c ++++ b/drivers/media/usb/stkwebcam/stk-webcam.c +@@ -144,7 +144,7 @@ int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value) + return 0; + } + +-int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value) ++int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value) + { + struct usb_device *udev = dev->udev; + unsigned char *buf; +@@ -163,7 +163,7 @@ int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value) + sizeof(u8), + 500); + if (ret >= 0) +- memcpy(value, buf, sizeof(u8)); ++ *value = *buf; + + kfree(buf); + return ret; +@@ -171,9 +171,10 @@ int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value) + + static int stk_start_stream(struct stk_camera *dev) + { +- int value; ++ u8 value; + int i, ret; +- int value_116, value_117; ++ u8 value_116, value_117; ++ + + if (!is_present(dev)) + return -ENODEV; +@@ -213,7 +214,7 @@ static int stk_start_stream(struct stk_camera *dev) + + static int stk_stop_stream(struct stk_camera *dev) + { +- int value; ++ u8 value; + int i; + if (is_present(dev)) { + stk_camera_read_reg(dev, 0x0100, &value); +diff --git a/drivers/media/usb/stkwebcam/stk-webcam.h b/drivers/media/usb/stkwebcam/stk-webcam.h +index 9bbfa3d9bfdd..92bb48e3c74e 100644 +--- a/drivers/media/usb/stkwebcam/stk-webcam.h ++++ b/drivers/media/usb/stkwebcam/stk-webcam.h +@@ -129,7 +129,7 @@ struct stk_camera { + #define vdev_to_camera(d) container_of(d, struct stk_camera, vdev) + + int stk_camera_write_reg(struct stk_camera *, u16, u8); +-int stk_camera_read_reg(struct stk_camera *, u16, int *); ++int stk_camera_read_reg(struct stk_camera *, u16, u8 *); + + int stk_sensor_init(struct stk_camera *); + int stk_sensor_configure(struct stk_camera *); +diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c +index 7ee1667acde4..00dff9b5a6c4 100644 +--- a/drivers/message/fusion/mptsas.c ++++ b/drivers/message/fusion/mptsas.c +@@ -1994,6 +1994,7 @@ static struct scsi_host_template mptsas_driver_template = { + .cmd_per_lun = 7, + .use_clustering = ENABLE_CLUSTERING, + .shost_attrs = mptscsih_host_attrs, ++ .no_write_same = 1, + }; + + static int mptsas_get_linkerrors(struct sas_phy *phy) +diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c +index 513457a2a7bf..13a015b8052b 100644 +--- a/drivers/net/bonding/bond_main.c ++++ b/drivers/net/bonding/bond_main.c +@@ -1654,8 +1654,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) + } /* switch(bond_mode) */ + + #ifdef CONFIG_NET_POLL_CONTROLLER +- slave_dev->npinfo = bond->dev->npinfo; +- if (slave_dev->npinfo) { ++ if (bond->dev->npinfo) { + if (slave_enable_netpoll(new_slave)) { + netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n"); + res = -EBUSY; +diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c +index 552de9c490c6..de336897a28a 100644 +--- a/drivers/net/ethernet/ti/cpsw.c ++++ b/drivers/net/ethernet/ti/cpsw.c +@@ -124,7 +124,7 @@ do { \ + + #define RX_PRIORITY_MAPPING 0x76543210 + #define TX_PRIORITY_MAPPING 0x33221100 +-#define CPDMA_TX_PRIORITY_MAP 0x01234567 ++#define CPDMA_TX_PRIORITY_MAP 0x76543210 + + #define CPSW_VLAN_AWARE BIT(1) + #define CPSW_ALE_VLAN_AWARE 1 +diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c +index dc36c2ec1d10..fa2c7bd638be 100644 +--- a/drivers/net/ppp/pppoe.c ++++ b/drivers/net/ppp/pppoe.c +@@ -620,6 +620,10 @@ static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr, + lock_sock(sk); + + error = -EINVAL; ++ ++ if (sockaddr_len != sizeof(struct sockaddr_pppox)) ++ goto end; ++ + if (sp->sa_protocol != PX_PROTO_OE) + goto end; + +diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c +index 8673ef3c9cdc..36963685d42a 100644 +--- a/drivers/net/team/team.c ++++ b/drivers/net/team/team.c +@@ -261,6 +261,17 @@ static void __team_option_inst_mark_removed_port(struct team *team, + } + } + ++static bool __team_option_inst_tmp_find(const struct list_head *opts, ++ const struct team_option_inst *needle) ++{ ++ struct team_option_inst *opt_inst; ++ ++ list_for_each_entry(opt_inst, opts, tmp_list) ++ if (opt_inst == needle) ++ return true; ++ return false; ++} ++ + static int __team_options_register(struct team *team, + const struct team_option *option, + size_t option_count) +@@ -1067,14 +1078,11 @@ static void team_port_leave(struct team *team, struct team_port *port) + } + + #ifdef CONFIG_NET_POLL_CONTROLLER +-static int team_port_enable_netpoll(struct team *team, struct team_port *port) ++static int __team_port_enable_netpoll(struct team_port *port) + { + struct netpoll *np; + int err; + +- if (!team->dev->npinfo) +- return 0; +- + np = kzalloc(sizeof(*np), GFP_KERNEL); + if (!np) + return -ENOMEM; +@@ -1088,6 +1096,14 @@ static int team_port_enable_netpoll(struct team *team, struct team_port *port) + return err; + } + ++static int team_port_enable_netpoll(struct team_port *port) ++{ ++ if (!port->team->dev->npinfo) ++ return 0; ++ ++ return __team_port_enable_netpoll(port); ++} ++ + static void team_port_disable_netpoll(struct team_port *port) + { + struct netpoll *np = port->np; +@@ -1102,7 +1118,7 @@ static void team_port_disable_netpoll(struct team_port *port) + kfree(np); + } + #else +-static int team_port_enable_netpoll(struct team *team, struct team_port *port) ++static int team_port_enable_netpoll(struct team_port *port) + { + return 0; + } +@@ -1210,7 +1226,7 @@ static int team_port_add(struct team *team, struct net_device *port_dev) + goto err_vids_add; + } + +- err = team_port_enable_netpoll(team, port); ++ err = team_port_enable_netpoll(port); + if (err) { + netdev_err(dev, "Failed to enable netpoll on device %s\n", + portname); +@@ -1908,7 +1924,7 @@ static int team_netpoll_setup(struct net_device *dev, + + mutex_lock(&team->lock); + list_for_each_entry(port, &team->port_list, list) { +- err = team_port_enable_netpoll(team, port); ++ err = __team_port_enable_netpoll(port); + if (err) { + __team_netpoll_cleanup(team); + break; +@@ -2569,6 +2585,14 @@ static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) + if (err) + goto team_put; + opt_inst->changed = true; ++ ++ /* dumb/evil user-space can send us duplicate opt, ++ * keep only the last one ++ */ ++ if (__team_option_inst_tmp_find(&opt_inst_list, ++ opt_inst)) ++ continue; ++ + list_add(&opt_inst->tmp_list, &opt_inst_list); + } + if (!opt_found) { +diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c +index 4fb468666b19..99424c87b464 100644 +--- a/drivers/net/usb/cdc_ether.c ++++ b/drivers/net/usb/cdc_ether.c +@@ -530,6 +530,7 @@ static const struct driver_info wwan_info = { + #define REALTEK_VENDOR_ID 0x0bda + #define SAMSUNG_VENDOR_ID 0x04e8 + #define LENOVO_VENDOR_ID 0x17ef ++#define LINKSYS_VENDOR_ID 0x13b1 + #define NVIDIA_VENDOR_ID 0x0955 + #define HP_VENDOR_ID 0x03f0 + +@@ -719,6 +720,15 @@ static const struct usb_device_id products[] = { + .driver_info = 0, + }, + ++#if IS_ENABLED(CONFIG_USB_RTL8152) ++/* Linksys USB3GIGV1 Ethernet Adapter */ ++{ ++ USB_DEVICE_AND_INTERFACE_INFO(LINKSYS_VENDOR_ID, 0x0041, USB_CLASS_COMM, ++ USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE), ++ .driver_info = 0, ++}, ++#endif ++ + /* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */ + { + USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM, +diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c +index b2d7c7e32250..3cdfa2465e3f 100644 +--- a/drivers/net/usb/r8152.c ++++ b/drivers/net/usb/r8152.c +@@ -519,6 +519,7 @@ enum rtl8152_flags { + #define VENDOR_ID_REALTEK 0x0bda + #define VENDOR_ID_SAMSUNG 0x04e8 + #define VENDOR_ID_LENOVO 0x17ef ++#define VENDOR_ID_LINKSYS 0x13b1 + #define VENDOR_ID_NVIDIA 0x0955 + + #define MCU_TYPE_PLA 0x0100 +@@ -4506,6 +4507,7 @@ static struct usb_device_id rtl8152_table[] = { + {REALTEK_USB_DEVICE(VENDOR_ID_SAMSUNG, 0xa101)}, + {REALTEK_USB_DEVICE(VENDOR_ID_LENOVO, 0x7205)}, + {REALTEK_USB_DEVICE(VENDOR_ID_LENOVO, 0x304f)}, ++ {REALTEK_USB_DEVICE(VENDOR_ID_LINKSYS, 0x0041)}, + {REALTEK_USB_DEVICE(VENDOR_ID_NVIDIA, 0x09ff)}, + {} + }; +diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c +index a497bf31953d..5aa5df24f4dc 100644 +--- a/drivers/net/wireless/ath/ath10k/mac.c ++++ b/drivers/net/wireless/ath/ath10k/mac.c +@@ -5819,9 +5819,8 @@ static void ath10k_sta_rc_update_wk(struct work_struct *wk) + sta->addr, smps, err); + } + +- if (changed & IEEE80211_RC_SUPP_RATES_CHANGED || +- changed & IEEE80211_RC_NSS_CHANGED) { +- ath10k_dbg(ar, ATH10K_DBG_MAC, "mac update sta %pM supp rates/nss\n", ++ if (changed & IEEE80211_RC_SUPP_RATES_CHANGED) { ++ ath10k_dbg(ar, ATH10K_DBG_MAC, "mac update sta %pM supp rates\n", + sta->addr); + + err = ath10k_station_assoc(ar, arvif->vif, sta, true); +diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c +index a35f78be8dec..acef4ec928c1 100644 +--- a/drivers/net/wireless/ath/ath9k/hw.c ++++ b/drivers/net/wireless/ath/ath9k/hw.c +@@ -1603,6 +1603,10 @@ bool ath9k_hw_check_alive(struct ath_hw *ah) + int count = 50; + u32 reg, last_val; + ++ /* Check if chip failed to wake up */ ++ if (REG_READ(ah, AR_CFG) == 0xdeadbeef) ++ return false; ++ + if (AR_SREV_9300(ah)) + return !ath9k_hw_detect_mac_hang(ah); + +diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c +index 4182c3775a72..2681b5339810 100644 +--- a/drivers/net/wireless/mac80211_hwsim.c ++++ b/drivers/net/wireless/mac80211_hwsim.c +@@ -3346,8 +3346,11 @@ static void __net_exit hwsim_exit_net(struct net *net) + continue; + + list_del(&data->list); +- INIT_WORK(&data->destroy_work, destroy_radio); +- schedule_work(&data->destroy_work); ++ spin_unlock_bh(&hwsim_radio_lock); ++ mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), ++ NULL); ++ spin_lock_bh(&hwsim_radio_lock); ++ + } + spin_unlock_bh(&hwsim_radio_lock); + } +diff --git a/drivers/of/base.c b/drivers/of/base.c +index a0bccb54a9bd..466b285cef3e 100644 +--- a/drivers/of/base.c ++++ b/drivers/of/base.c +@@ -2109,7 +2109,7 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)) + continue; + + /* Allocate an alias_prop with enough space for the stem */ +- ap = dt_alloc(sizeof(*ap) + len + 1, 4); ++ ap = dt_alloc(sizeof(*ap) + len + 1, __alignof__(*ap)); + if (!ap) + continue; + memset(ap, 0, sizeof(*ap) + len + 1); +diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c +index a87c8e1aef68..9c13aeeeb973 100644 +--- a/drivers/pci/pci.c ++++ b/drivers/pci/pci.c +@@ -3756,27 +3756,49 @@ int pci_wait_for_pending_transaction(struct pci_dev *dev) + } + EXPORT_SYMBOL(pci_wait_for_pending_transaction); + +-/* +- * We should only need to wait 100ms after FLR, but some devices take longer. +- * Wait for up to 1000ms for config space to return something other than -1. +- * Intel IGD requires this when an LCD panel is attached. We read the 2nd +- * dword because VFs don't implement the 1st dword. +- */ + static void pci_flr_wait(struct pci_dev *dev) + { +- int i = 0; ++ int delay = 1, timeout = 60000; + u32 id; + +- do { +- msleep(100); ++ /* ++ * Per PCIe r3.1, sec 6.6.2, a device must complete an FLR within ++ * 100ms, but may silently discard requests while the FLR is in ++ * progress. Wait 100ms before trying to access the device. ++ */ ++ msleep(100); ++ ++ /* ++ * After 100ms, the device should not silently discard config ++ * requests, but it may still indicate that it needs more time by ++ * responding to them with CRS completions. The Root Port will ++ * generally synthesize ~0 data to complete the read (except when ++ * CRS SV is enabled and the read was for the Vendor ID; in that ++ * case it synthesizes 0x0001 data). ++ * ++ * Wait for the device to return a non-CRS completion. Read the ++ * Command register instead of Vendor ID so we don't have to ++ * contend with the CRS SV value. ++ */ ++ pci_read_config_dword(dev, PCI_COMMAND, &id); ++ while (id == ~0) { ++ if (delay > timeout) { ++ dev_warn(&dev->dev, "not ready %dms after FLR; giving up\n", ++ 100 + delay - 1); ++ return; ++ } ++ ++ if (delay > 1000) ++ dev_info(&dev->dev, "not ready %dms after FLR; waiting\n", ++ 100 + delay - 1); ++ ++ msleep(delay); ++ delay *= 2; + pci_read_config_dword(dev, PCI_COMMAND, &id); +- } while (i++ < 10 && id == ~0); ++ } + +- if (id == ~0) +- dev_warn(&dev->dev, "Failed to return from FLR\n"); +- else if (i > 1) +- dev_info(&dev->dev, "Required additional %dms to return from FLR\n", +- (i - 1) * 100); ++ if (delay > 1000) ++ dev_info(&dev->dev, "ready %dms after FLR\n", 100 + delay - 1); + } + + static int pcie_flr(struct pci_dev *dev, int probe) +diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c +index df63b7d997e8..b40a074822cf 100644 +--- a/drivers/pinctrl/intel/pinctrl-intel.c ++++ b/drivers/pinctrl/intel/pinctrl-intel.c +@@ -368,18 +368,6 @@ static void __intel_gpio_set_direction(void __iomem *padcfg0, bool input) + writel(value, padcfg0); + } + +-static void intel_gpio_set_gpio_mode(void __iomem *padcfg0) +-{ +- u32 value; +- +- /* Put the pad into GPIO mode */ +- value = readl(padcfg0) & ~PADCFG0_PMODE_MASK; +- /* Disable SCI/SMI/NMI generation */ +- value &= ~(PADCFG0_GPIROUTIOXAPIC | PADCFG0_GPIROUTSCI); +- value &= ~(PADCFG0_GPIROUTSMI | PADCFG0_GPIROUTNMI); +- writel(value, padcfg0); +-} +- + static int intel_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned pin) +@@ -387,6 +375,7 @@ static int intel_gpio_request_enable(struct pinctrl_dev *pctldev, + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + void __iomem *padcfg0; + unsigned long flags; ++ u32 value; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + +@@ -396,7 +385,13 @@ static int intel_gpio_request_enable(struct pinctrl_dev *pctldev, + } + + padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0); +- intel_gpio_set_gpio_mode(padcfg0); ++ /* Put the pad into GPIO mode */ ++ value = readl(padcfg0) & ~PADCFG0_PMODE_MASK; ++ /* Disable SCI/SMI/NMI generation */ ++ value &= ~(PADCFG0_GPIROUTIOXAPIC | PADCFG0_GPIROUTSCI); ++ value &= ~(PADCFG0_GPIROUTSMI | PADCFG0_GPIROUTNMI); ++ writel(value, padcfg0); ++ + /* Disable TX buffer and enable RX (this will be input) */ + __intel_gpio_set_direction(padcfg0, true); + +@@ -775,8 +770,6 @@ static int intel_gpio_irq_type(struct irq_data *d, unsigned type) + + raw_spin_lock_irqsave(&pctrl->lock, flags); + +- intel_gpio_set_gpio_mode(reg); +- + value = readl(reg); + + value &= ~(PADCFG0_RXEVCFG_MASK | PADCFG0_RXINV); +diff --git a/drivers/power/supply/bq2415x_charger.c b/drivers/power/supply/bq2415x_charger.c +index 73e2f0b79dd4..c4770a94cc8e 100644 +--- a/drivers/power/supply/bq2415x_charger.c ++++ b/drivers/power/supply/bq2415x_charger.c +@@ -1569,6 +1569,11 @@ static int bq2415x_probe(struct i2c_client *client, + acpi_id = + acpi_match_device(client->dev.driver->acpi_match_table, + &client->dev); ++ if (!acpi_id) { ++ dev_err(&client->dev, "failed to match device name\n"); ++ ret = -ENODEV; ++ goto error_1; ++ } + name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num); + } + if (!name) { +diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c +index 1e560188dd13..e453d2a7d7f9 100644 +--- a/drivers/s390/block/dasd_alias.c ++++ b/drivers/s390/block/dasd_alias.c +@@ -591,13 +591,22 @@ static int _schedule_lcu_update(struct alias_lcu *lcu, + int dasd_alias_add_device(struct dasd_device *device) + { + struct dasd_eckd_private *private = device->private; +- struct alias_lcu *lcu; ++ __u8 uaddr = private->uid.real_unit_addr; ++ struct alias_lcu *lcu = private->lcu; + unsigned long flags; + int rc; + +- lcu = private->lcu; + rc = 0; + spin_lock_irqsave(&lcu->lock, flags); ++ /* ++ * Check if device and lcu type differ. If so, the uac data may be ++ * outdated and needs to be updated. ++ */ ++ if (private->uid.type != lcu->uac->unit[uaddr].ua_type) { ++ lcu->flags |= UPDATE_PENDING; ++ DBF_DEV_EVENT(DBF_WARNING, device, "%s", ++ "uid type mismatch - trigger rescan"); ++ } + if (!(lcu->flags & UPDATE_PENDING)) { + rc = _add_device_to_lcu(lcu, device, device); + if (rc) +diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile +index 41e28b23b26a..8ac27efe34fc 100644 +--- a/drivers/s390/char/Makefile ++++ b/drivers/s390/char/Makefile +@@ -2,6 +2,8 @@ + # S/390 character devices + # + ++CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_EXPOLINE) ++ + obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \ + sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \ + sclp_early.o +diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c +index 11674698b36d..67903c93328b 100644 +--- a/drivers/s390/cio/chsc.c ++++ b/drivers/s390/cio/chsc.c +@@ -451,6 +451,7 @@ static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) + + static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) + { ++ struct channel_path *chp; + struct chp_link link; + struct chp_id chpid; + int status; +@@ -463,10 +464,17 @@ static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) + chpid.id = sei_area->rsid; + /* allocate a new channel path structure, if needed */ + status = chp_get_status(chpid); +- if (status < 0) +- chp_new(chpid); +- else if (!status) ++ if (!status) + return; ++ ++ if (status < 0) { ++ chp_new(chpid); ++ } else { ++ chp = chpid_to_chp(chpid); ++ mutex_lock(&chp->lock); ++ chp_update_desc(chp); ++ mutex_unlock(&chp->lock); ++ } + memset(&link, 0, sizeof(struct chp_link)); + link.chpid = chpid; + if ((sei_area->vf & 0xc0) != 0) { +diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c +index 2d9a8067eaca..579aa9accafc 100644 +--- a/drivers/usb/musb/musb_core.c ++++ b/drivers/usb/musb/musb_core.c +@@ -1774,6 +1774,7 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) + int vbus; + u8 devctl; + ++ pm_runtime_get_sync(dev); + spin_lock_irqsave(&musb->lock, flags); + val = musb->a_wait_bcon; + vbus = musb_platform_get_vbus_status(musb); +@@ -1787,6 +1788,7 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) + vbus = 0; + } + spin_unlock_irqrestore(&musb->lock, flags); ++ pm_runtime_put_sync(dev); + + return sprintf(buf, "Vbus %s, timeout %lu msec\n", + vbus ? "on" : "off", val); +@@ -2483,10 +2485,11 @@ static int musb_remove(struct platform_device *pdev) + musb_generic_disable(musb); + spin_unlock_irqrestore(&musb->lock, flags); + musb_writeb(musb->mregs, MUSB_DEVCTL, 0); ++ musb_platform_exit(musb); ++ + pm_runtime_dont_use_autosuspend(musb->controller); + pm_runtime_put_sync(musb->controller); + pm_runtime_disable(musb->controller); +- musb_platform_exit(musb); + musb_phy_callback = NULL; + if (musb->dma_controller) + musb_dma_controller_destroy(musb->dma_controller); +@@ -2710,7 +2713,8 @@ static int musb_resume(struct device *dev) + if ((devctl & mask) != (musb->context.devctl & mask)) + musb->port1_status = 0; + +- musb_start(musb); ++ musb_enable_interrupts(musb); ++ musb_platform_enable(musb); + + spin_lock_irqsave(&musb->lock, flags); + error = musb_run_resume_work(musb); +diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c +index d9cbda269462..331ddd07e505 100644 +--- a/fs/cifs/dir.c ++++ b/fs/cifs/dir.c +@@ -673,6 +673,9 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, + goto mknod_out; + } + ++ if (!S_ISCHR(mode) && !S_ISBLK(mode)) ++ goto mknod_out; ++ + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) + goto mknod_out; + +@@ -681,10 +684,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, + + buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); + if (buf == NULL) { +- kfree(full_path); + rc = -ENOMEM; +- free_xid(xid); +- return rc; ++ goto mknod_out; + } + + if (backup_cred(cifs_sb)) +@@ -731,7 +732,7 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, + pdev->minor = cpu_to_le64(MINOR(device_number)); + rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, + &bytes_written, iov, 1); +- } /* else if (S_ISFIFO) */ ++ } + tcon->ses->server->ops->close(xid, tcon, &fid); + d_drop(direntry); + +diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c +index 542e33d29088..d10bb2c30bf8 100644 +--- a/fs/jbd2/journal.c ++++ b/fs/jbd2/journal.c +@@ -276,11 +276,11 @@ static int kjournald2(void *arg) + goto loop; + + end_loop: +- write_unlock(&journal->j_state_lock); + del_timer_sync(&journal->j_commit_timer); + journal->j_task = NULL; + wake_up(&journal->j_wait_done_commit); + jbd_debug(1, "Journal thread exiting.\n"); ++ write_unlock(&journal->j_state_lock); + return 0; + } + +diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h +index 8feecd5345e7..7e39719e27cb 100644 +--- a/include/linux/if_vlan.h ++++ b/include/linux/if_vlan.h +@@ -600,7 +600,7 @@ static inline bool skb_vlan_tagged(const struct sk_buff *skb) + * Returns true if the skb is tagged with multiple vlan headers, regardless + * of whether it is hardware accelerated or not. + */ +-static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) ++static inline bool skb_vlan_tagged_multi(struct sk_buff *skb) + { + __be16 protocol = skb->protocol; + +@@ -610,6 +610,9 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) + if (likely(!eth_type_vlan(protocol))) + return false; + ++ if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN))) ++ return false; ++ + veh = (struct vlan_ethhdr *)skb->data; + protocol = veh->h_vlan_encapsulated_proto; + } +@@ -627,7 +630,7 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) + * + * Returns features without unsafe ones if the skb has multiple tags. + */ +-static inline netdev_features_t vlan_features_check(const struct sk_buff *skb, ++static inline netdev_features_t vlan_features_check(struct sk_buff *skb, + netdev_features_t features) + { + if (skb_vlan_tagged_multi(skb)) { +diff --git a/include/net/llc_conn.h b/include/net/llc_conn.h +index fe994d2e5286..ea985aa7a6c5 100644 +--- a/include/net/llc_conn.h ++++ b/include/net/llc_conn.h +@@ -97,6 +97,7 @@ static __inline__ char llc_backlog_type(struct sk_buff *skb) + + struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority, + struct proto *prot, int kern); ++void llc_sk_stop_all_timers(struct sock *sk, bool sync); + void llc_sk_free(struct sock *sk); + + void llc_sk_reset(struct sock *sk); +diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h +index 4ee67cb99143..05b9bb63dbec 100644 +--- a/include/uapi/linux/kvm.h ++++ b/include/uapi/linux/kvm.h +@@ -870,6 +870,7 @@ struct kvm_ppc_smmu_info { + #define KVM_CAP_S390_USER_INSTR0 130 + #define KVM_CAP_MSI_DEVID 131 + #define KVM_CAP_PPC_HTM 132 ++#define KVM_CAP_S390_BPB 152 + + #ifdef KVM_CAP_IRQ_ROUTING + +diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c +index 411226b26bca..04988d6466bf 100644 +--- a/kernel/events/callchain.c ++++ b/kernel/events/callchain.c +@@ -117,19 +117,22 @@ int get_callchain_buffers(int event_max_stack) + goto exit; + } + ++ /* ++ * If requesting per event more than the global cap, ++ * return a different error to help userspace figure ++ * this out. ++ * ++ * And also do it here so that we have &callchain_mutex held. ++ */ ++ if (event_max_stack > sysctl_perf_event_max_stack) { ++ err = -EOVERFLOW; ++ goto exit; ++ } ++ + if (count > 1) { + /* If the allocation failed, give up */ + if (!callchain_cpus_entries) + err = -ENOMEM; +- /* +- * If requesting per event more than the global cap, +- * return a different error to help userspace figure +- * this out. +- * +- * And also do it here so that we have &callchain_mutex held. +- */ +- if (event_max_stack > sysctl_perf_event_max_stack) +- err = -EOVERFLOW; + goto exit; + } + +diff --git a/kernel/events/core.c b/kernel/events/core.c +index 74710fad35d5..b1d6b9888fba 100644 +--- a/kernel/events/core.c ++++ b/kernel/events/core.c +@@ -9456,9 +9456,9 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr, + * __u16 sample size limit. + */ + if (attr->sample_stack_user >= USHRT_MAX) +- ret = -EINVAL; ++ return -EINVAL; + else if (!IS_ALIGNED(attr->sample_stack_user, sizeof(u64))) +- ret = -EINVAL; ++ return -EINVAL; + } + + if (attr->sample_type & PERF_SAMPLE_REGS_INTR) +diff --git a/net/core/dev.c b/net/core/dev.c +index 3d9190c2940d..5407d5f7b2d0 100644 +--- a/net/core/dev.c ++++ b/net/core/dev.c +@@ -2871,7 +2871,7 @@ netdev_features_t passthru_features_check(struct sk_buff *skb, + } + EXPORT_SYMBOL(passthru_features_check); + +-static netdev_features_t dflt_features_check(const struct sk_buff *skb, ++static netdev_features_t dflt_features_check(struct sk_buff *skb, + struct net_device *dev, + netdev_features_t features) + { +diff --git a/net/core/neighbour.c b/net/core/neighbour.c +index a426790b0688..128c811dcb1a 100644 +--- a/net/core/neighbour.c ++++ b/net/core/neighbour.c +@@ -54,7 +54,8 @@ do { \ + static void neigh_timer_handler(unsigned long arg); + static void __neigh_notify(struct neighbour *n, int type, int flags); + static void neigh_update_notify(struct neighbour *neigh); +-static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev); ++static int pneigh_ifdown_and_unlock(struct neigh_table *tbl, ++ struct net_device *dev); + + #ifdef CONFIG_PROC_FS + static const struct file_operations neigh_stat_seq_fops; +@@ -254,8 +255,7 @@ int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev) + { + write_lock_bh(&tbl->lock); + neigh_flush_dev(tbl, dev); +- pneigh_ifdown(tbl, dev); +- write_unlock_bh(&tbl->lock); ++ pneigh_ifdown_and_unlock(tbl, dev); + + del_timer_sync(&tbl->proxy_timer); + pneigh_queue_purge(&tbl->proxy_queue); +@@ -645,9 +645,10 @@ int pneigh_delete(struct neigh_table *tbl, struct net *net, const void *pkey, + return -ENOENT; + } + +-static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev) ++static int pneigh_ifdown_and_unlock(struct neigh_table *tbl, ++ struct net_device *dev) + { +- struct pneigh_entry *n, **np; ++ struct pneigh_entry *n, **np, *freelist = NULL; + u32 h; + + for (h = 0; h <= PNEIGH_HASHMASK; h++) { +@@ -655,16 +656,23 @@ static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev) + while ((n = *np) != NULL) { + if (!dev || n->dev == dev) { + *np = n->next; +- if (tbl->pdestructor) +- tbl->pdestructor(n); +- if (n->dev) +- dev_put(n->dev); +- kfree(n); ++ n->next = freelist; ++ freelist = n; + continue; + } + np = &n->next; + } + } ++ write_unlock_bh(&tbl->lock); ++ while ((n = freelist)) { ++ freelist = n->next; ++ n->next = NULL; ++ if (tbl->pdestructor) ++ tbl->pdestructor(n); ++ if (n->dev) ++ dev_put(n->dev); ++ kfree(n); ++ } + return -ENOENT; + } + +@@ -2279,12 +2287,16 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb, + + err = nlmsg_parse(nlh, sizeof(struct ndmsg), tb, NDA_MAX, NULL); + if (!err) { +- if (tb[NDA_IFINDEX]) ++ if (tb[NDA_IFINDEX]) { ++ if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32)) ++ return -EINVAL; + filter_idx = nla_get_u32(tb[NDA_IFINDEX]); +- +- if (tb[NDA_MASTER]) ++ } ++ if (tb[NDA_MASTER]) { ++ if (nla_len(tb[NDA_MASTER]) != sizeof(u32)) ++ return -EINVAL; + filter_master_idx = nla_get_u32(tb[NDA_MASTER]); +- ++ } + if (filter_idx || filter_master_idx) + flags |= NLM_F_DUMP_FILTERED; + } +diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c +index e1d4d898a007..f0252768ecf4 100644 +--- a/net/dns_resolver/dns_key.c ++++ b/net/dns_resolver/dns_key.c +@@ -25,6 +25,7 @@ + #include <linux/moduleparam.h> + #include <linux/slab.h> + #include <linux/string.h> ++#include <linux/ratelimit.h> + #include <linux/kernel.h> + #include <linux/keyctl.h> + #include <linux/err.h> +@@ -91,9 +92,9 @@ dns_resolver_preparse(struct key_preparsed_payload *prep) + + next_opt = memchr(opt, '#', end - opt) ?: end; + opt_len = next_opt - opt; +- if (!opt_len) { +- printk(KERN_WARNING +- "Empty option to dns_resolver key\n"); ++ if (opt_len <= 0 || opt_len > 128) { ++ pr_warn_ratelimited("Invalid option length (%d) for dns_resolver key\n", ++ opt_len); + return -EINVAL; + } + +@@ -127,10 +128,8 @@ dns_resolver_preparse(struct key_preparsed_payload *prep) + } + + bad_option_value: +- printk(KERN_WARNING +- "Option '%*.*s' to dns_resolver key:" +- " bad/missing value\n", +- opt_nlen, opt_nlen, opt); ++ pr_warn_ratelimited("Option '%*.*s' to dns_resolver key: bad/missing value\n", ++ opt_nlen, opt_nlen, opt); + return -EINVAL; + } while (opt = next_opt + 1, opt < end); + } +diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c +index 0d1a767db1bb..0fc5dad02fe8 100644 +--- a/net/ipv4/tcp.c ++++ b/net/ipv4/tcp.c +@@ -2662,8 +2662,10 @@ static int do_tcp_setsockopt(struct sock *sk, int level, + + #ifdef CONFIG_TCP_MD5SIG + case TCP_MD5SIG: +- /* Read the IP->Key mappings from userspace */ +- err = tp->af_specific->md5_parse(sk, optval, optlen); ++ if ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) ++ err = tp->af_specific->md5_parse(sk, optval, optlen); ++ else ++ err = -EINVAL; + break; + #endif + case TCP_USER_TIMEOUT: +diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c +index eb05ad940e37..52b0a84be765 100644 +--- a/net/ipv4/tcp_input.c ++++ b/net/ipv4/tcp_input.c +@@ -3943,11 +3943,8 @@ const u8 *tcp_parse_md5sig_option(const struct tcphdr *th) + int length = (th->doff << 2) - sizeof(*th); + const u8 *ptr = (const u8 *)(th + 1); + +- /* If the TCP option is too short, we can short cut */ +- if (length < TCPOLEN_MD5SIG) +- return NULL; +- +- while (length > 0) { ++ /* If not enough data remaining, we can short cut */ ++ while (length >= TCPOLEN_MD5SIG) { + int opcode = *ptr++; + int opsize; + +diff --git a/net/ipv6/route.c b/net/ipv6/route.c +index d6a4b2c73a7c..f6ac472acd0f 100644 +--- a/net/ipv6/route.c ++++ b/net/ipv6/route.c +@@ -2811,6 +2811,7 @@ void rt6_mtu_change(struct net_device *dev, unsigned int mtu) + + static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { + [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, ++ [RTA_PREFSRC] = { .len = sizeof(struct in6_addr) }, + [RTA_OIF] = { .type = NLA_U32 }, + [RTA_IIF] = { .type = NLA_U32 }, + [RTA_PRIORITY] = { .type = NLA_U32 }, +@@ -2820,6 +2821,7 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { + [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, + [RTA_ENCAP] = { .type = NLA_NESTED }, + [RTA_EXPIRES] = { .type = NLA_U32 }, ++ [RTA_TABLE] = { .type = NLA_U32 }, + }; + + static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, +diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c +index 163f1fa53917..9b214f313cc0 100644 +--- a/net/l2tp/l2tp_ppp.c ++++ b/net/l2tp/l2tp_ppp.c +@@ -590,6 +590,13 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr, + lock_sock(sk); + + error = -EINVAL; ++ ++ if (sockaddr_len != sizeof(struct sockaddr_pppol2tp) && ++ sockaddr_len != sizeof(struct sockaddr_pppol2tpv3) && ++ sockaddr_len != sizeof(struct sockaddr_pppol2tpin6) && ++ sockaddr_len != sizeof(struct sockaddr_pppol2tpv3in6)) ++ goto end; ++ + if (sp->sa_protocol != PX_PROTO_OL2TP) + goto end; + +diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c +index f7caf0f5d9c8..d6bc5f2a1175 100644 +--- a/net/llc/af_llc.c ++++ b/net/llc/af_llc.c +@@ -197,9 +197,19 @@ static int llc_ui_release(struct socket *sock) + llc->laddr.lsap, llc->daddr.lsap); + if (!llc_send_disc(sk)) + llc_ui_wait_for_disc(sk, sk->sk_rcvtimeo); +- if (!sock_flag(sk, SOCK_ZAPPED)) ++ if (!sock_flag(sk, SOCK_ZAPPED)) { ++ struct llc_sap *sap = llc->sap; ++ ++ /* Hold this for release_sock(), so that llc_backlog_rcv() ++ * could still use it. ++ */ ++ llc_sap_hold(sap); + llc_sap_remove_socket(llc->sap, sk); +- release_sock(sk); ++ release_sock(sk); ++ llc_sap_put(sap); ++ } else { ++ release_sock(sk); ++ } + if (llc->dev) + dev_put(llc->dev); + sock_put(sk); +diff --git a/net/llc/llc_c_ac.c b/net/llc/llc_c_ac.c +index ea225bd2672c..f8d4ab8ca1a5 100644 +--- a/net/llc/llc_c_ac.c ++++ b/net/llc/llc_c_ac.c +@@ -1096,14 +1096,7 @@ int llc_conn_ac_inc_tx_win_size(struct sock *sk, struct sk_buff *skb) + + int llc_conn_ac_stop_all_timers(struct sock *sk, struct sk_buff *skb) + { +- struct llc_sock *llc = llc_sk(sk); +- +- del_timer(&llc->pf_cycle_timer.timer); +- del_timer(&llc->ack_timer.timer); +- del_timer(&llc->rej_sent_timer.timer); +- del_timer(&llc->busy_state_timer.timer); +- llc->ack_must_be_send = 0; +- llc->ack_pf = 0; ++ llc_sk_stop_all_timers(sk, false); + return 0; + } + +diff --git a/net/llc/llc_conn.c b/net/llc/llc_conn.c +index 8bc5a1bd2d45..d861b74ad068 100644 +--- a/net/llc/llc_conn.c ++++ b/net/llc/llc_conn.c +@@ -951,6 +951,26 @@ struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority, struct pr + return sk; + } + ++void llc_sk_stop_all_timers(struct sock *sk, bool sync) ++{ ++ struct llc_sock *llc = llc_sk(sk); ++ ++ if (sync) { ++ del_timer_sync(&llc->pf_cycle_timer.timer); ++ del_timer_sync(&llc->ack_timer.timer); ++ del_timer_sync(&llc->rej_sent_timer.timer); ++ del_timer_sync(&llc->busy_state_timer.timer); ++ } else { ++ del_timer(&llc->pf_cycle_timer.timer); ++ del_timer(&llc->ack_timer.timer); ++ del_timer(&llc->rej_sent_timer.timer); ++ del_timer(&llc->busy_state_timer.timer); ++ } ++ ++ llc->ack_must_be_send = 0; ++ llc->ack_pf = 0; ++} ++ + /** + * llc_sk_free - Frees a LLC socket + * @sk - socket to free +@@ -963,7 +983,7 @@ void llc_sk_free(struct sock *sk) + + llc->state = LLC_CONN_OUT_OF_SVC; + /* Stop all (possibly) running timers */ +- llc_conn_ac_stop_all_timers(sk, NULL); ++ llc_sk_stop_all_timers(sk, true); + #ifdef DEBUG_LLC_CONN_ALLOC + printk(KERN_INFO "%s: unackq=%d, txq=%d\n", __func__, + skb_queue_len(&llc->pdu_unack_q), +diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c +index 267db0d603bc..a027f8c00944 100644 +--- a/net/packet/af_packet.c ++++ b/net/packet/af_packet.c +@@ -333,11 +333,11 @@ static void packet_pick_tx_queue(struct net_device *dev, struct sk_buff *skb) + skb_set_queue_mapping(skb, queue_index); + } + +-/* register_prot_hook must be invoked with the po->bind_lock held, ++/* __register_prot_hook must be invoked through register_prot_hook + * or from a context in which asynchronous accesses to the packet + * socket is not possible (packet_create()). + */ +-static void register_prot_hook(struct sock *sk) ++static void __register_prot_hook(struct sock *sk) + { + struct packet_sock *po = pkt_sk(sk); + +@@ -352,8 +352,13 @@ static void register_prot_hook(struct sock *sk) + } + } + +-/* {,__}unregister_prot_hook() must be invoked with the po->bind_lock +- * held. If the sync parameter is true, we will temporarily drop ++static void register_prot_hook(struct sock *sk) ++{ ++ lockdep_assert_held_once(&pkt_sk(sk)->bind_lock); ++ __register_prot_hook(sk); ++} ++ ++/* If the sync parameter is true, we will temporarily drop + * the po->bind_lock and do a synchronize_net to make sure no + * asynchronous packet processing paths still refer to the elements + * of po->prot_hook. If the sync parameter is false, it is the +@@ -363,6 +368,8 @@ static void __unregister_prot_hook(struct sock *sk, bool sync) + { + struct packet_sock *po = pkt_sk(sk); + ++ lockdep_assert_held_once(&po->bind_lock); ++ + po->running = 0; + + if (po->fanout) +@@ -3017,6 +3024,7 @@ static int packet_release(struct socket *sock) + + packet_flush_mclist(sk); + ++ lock_sock(sk); + if (po->rx_ring.pg_vec) { + memset(&req_u, 0, sizeof(req_u)); + packet_set_ring(sk, &req_u, 1, 0); +@@ -3026,6 +3034,7 @@ static int packet_release(struct socket *sock) + memset(&req_u, 0, sizeof(req_u)); + packet_set_ring(sk, &req_u, 1, 1); + } ++ release_sock(sk); + + f = fanout_release(sk); + +@@ -3259,7 +3268,7 @@ static int packet_create(struct net *net, struct socket *sock, int protocol, + + if (proto) { + po->prot_hook.type = proto; +- register_prot_hook(sk); ++ __register_prot_hook(sk); + } + + mutex_lock(&net->packet.sklist_lock); +@@ -3654,6 +3663,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + union tpacket_req_u req_u; + int len; + ++ lock_sock(sk); + switch (po->tp_version) { + case TPACKET_V1: + case TPACKET_V2: +@@ -3664,12 +3674,17 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + len = sizeof(req_u.req3); + break; + } +- if (optlen < len) +- return -EINVAL; +- if (copy_from_user(&req_u.req, optval, len)) +- return -EFAULT; +- return packet_set_ring(sk, &req_u, 0, +- optname == PACKET_TX_RING); ++ if (optlen < len) { ++ ret = -EINVAL; ++ } else { ++ if (copy_from_user(&req_u.req, optval, len)) ++ ret = -EFAULT; ++ else ++ ret = packet_set_ring(sk, &req_u, 0, ++ optname == PACKET_TX_RING); ++ } ++ release_sock(sk); ++ return ret; + } + case PACKET_COPY_THRESH: + { +@@ -3735,12 +3750,18 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + + if (optlen != sizeof(val)) + return -EINVAL; +- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) +- return -EBUSY; + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; +- po->tp_loss = !!val; +- return 0; ++ ++ lock_sock(sk); ++ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { ++ ret = -EBUSY; ++ } else { ++ po->tp_loss = !!val; ++ ret = 0; ++ } ++ release_sock(sk); ++ return ret; + } + case PACKET_AUXDATA: + { +@@ -3751,7 +3772,9 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; + ++ lock_sock(sk); + po->auxdata = !!val; ++ release_sock(sk); + return 0; + } + case PACKET_ORIGDEV: +@@ -3763,7 +3786,9 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; + ++ lock_sock(sk); + po->origdev = !!val; ++ release_sock(sk); + return 0; + } + case PACKET_VNET_HDR: +@@ -3772,15 +3797,20 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + + if (sock->type != SOCK_RAW) + return -EINVAL; +- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) +- return -EBUSY; + if (optlen < sizeof(val)) + return -EINVAL; + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; + +- po->has_vnet_hdr = !!val; +- return 0; ++ lock_sock(sk); ++ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { ++ ret = -EBUSY; ++ } else { ++ po->has_vnet_hdr = !!val; ++ ret = 0; ++ } ++ release_sock(sk); ++ return ret; + } + case PACKET_TIMESTAMP: + { +@@ -3818,11 +3848,17 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + + if (optlen != sizeof(val)) + return -EINVAL; +- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) +- return -EBUSY; + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; +- po->tp_tx_has_off = !!val; ++ ++ lock_sock(sk); ++ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { ++ ret = -EBUSY; ++ } else { ++ po->tp_tx_has_off = !!val; ++ ret = 0; ++ } ++ release_sock(sk); + return 0; + } + case PACKET_QDISC_BYPASS: +@@ -4219,7 +4255,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, + /* Added to avoid minimal code churn */ + struct tpacket_req *req = &req_u->req; + +- lock_sock(sk); + /* Opening a Tx-ring is NOT supported in TPACKET_V3 */ + if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) { + net_warn_ratelimited("Tx-ring is not supported.\n"); +@@ -4355,7 +4390,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, + if (pg_vec) + free_pg_vec(pg_vec, order, req->tp_block_nr); + out: +- release_sock(sk); + return err; + } + +diff --git a/net/packet/internal.h b/net/packet/internal.h +index d55bfc34d6b3..1309e2a7baad 100644 +--- a/net/packet/internal.h ++++ b/net/packet/internal.h +@@ -109,10 +109,12 @@ struct packet_sock { + int copy_thresh; + spinlock_t bind_lock; + struct mutex pg_vec_lock; +- unsigned int running:1, /* prot_hook is attached*/ +- auxdata:1, ++ unsigned int running; /* bind_lock must be held */ ++ unsigned int auxdata:1, /* writer must hold sock lock */ + origdev:1, +- has_vnet_hdr:1; ++ has_vnet_hdr:1, ++ tp_loss:1, ++ tp_tx_has_off:1; + int pressure; + int ifindex; /* bound device */ + __be16 num; +@@ -122,8 +124,6 @@ struct packet_sock { + enum tpacket_versions tp_version; + unsigned int tp_hdrlen; + unsigned int tp_reserve; +- unsigned int tp_loss:1; +- unsigned int tp_tx_has_off:1; + unsigned int tp_tstamp; + struct net_device __rcu *cached_dev; + int (*xmit)(struct sk_buff *skb); +diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c +index 95c463cbb9a6..235db2c9bbbb 100644 +--- a/net/sched/act_ife.c ++++ b/net/sched/act_ife.c +@@ -634,7 +634,7 @@ int find_decode_metaid(struct sk_buff *skb, struct tcf_ife_info *ife, + } + } + +- return 0; ++ return -ENOENT; + } + + struct ifeheadr { +diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c +index 355d95a7cd81..e031797ad311 100644 +--- a/net/sctp/ipv6.c ++++ b/net/sctp/ipv6.c +@@ -521,46 +521,49 @@ static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, + addr->v6.sin6_scope_id = 0; + } + +-/* Compare addresses exactly. +- * v4-mapped-v6 is also in consideration. +- */ +-static int sctp_v6_cmp_addr(const union sctp_addr *addr1, +- const union sctp_addr *addr2) ++static int __sctp_v6_cmp_addr(const union sctp_addr *addr1, ++ const union sctp_addr *addr2) + { + if (addr1->sa.sa_family != addr2->sa.sa_family) { + if (addr1->sa.sa_family == AF_INET && + addr2->sa.sa_family == AF_INET6 && +- ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { +- if (addr2->v6.sin6_port == addr1->v4.sin_port && +- addr2->v6.sin6_addr.s6_addr32[3] == +- addr1->v4.sin_addr.s_addr) +- return 1; +- } ++ ipv6_addr_v4mapped(&addr2->v6.sin6_addr) && ++ addr2->v6.sin6_addr.s6_addr32[3] == ++ addr1->v4.sin_addr.s_addr) ++ return 1; ++ + if (addr2->sa.sa_family == AF_INET && + addr1->sa.sa_family == AF_INET6 && +- ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { +- if (addr1->v6.sin6_port == addr2->v4.sin_port && +- addr1->v6.sin6_addr.s6_addr32[3] == +- addr2->v4.sin_addr.s_addr) +- return 1; +- } ++ ipv6_addr_v4mapped(&addr1->v6.sin6_addr) && ++ addr1->v6.sin6_addr.s6_addr32[3] == ++ addr2->v4.sin_addr.s_addr) ++ return 1; ++ + return 0; + } +- if (addr1->v6.sin6_port != addr2->v6.sin6_port) +- return 0; ++ + if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) + return 0; ++ + /* If this is a linklocal address, compare the scope_id. */ +- if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { +- if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && +- (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { +- return 0; +- } +- } ++ if ((ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) && ++ addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && ++ addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id) ++ return 0; + + return 1; + } + ++/* Compare addresses exactly. ++ * v4-mapped-v6 is also in consideration. ++ */ ++static int sctp_v6_cmp_addr(const union sctp_addr *addr1, ++ const union sctp_addr *addr2) ++{ ++ return __sctp_v6_cmp_addr(addr1, addr2) && ++ addr1->v6.sin6_port == addr2->v6.sin6_port; ++} ++ + /* Initialize addr struct to INADDR_ANY. */ + static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) + { +@@ -844,8 +847,8 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, + const union sctp_addr *addr2, + struct sctp_sock *opt) + { +- struct sctp_af *af1, *af2; + struct sock *sk = sctp_opt2sk(opt); ++ struct sctp_af *af1, *af2; + + af1 = sctp_get_af_specific(addr1->sa.sa_family); + af2 = sctp_get_af_specific(addr2->sa.sa_family); +@@ -861,10 +864,7 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, + if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) + return 1; + +- if (addr1->sa.sa_family != addr2->sa.sa_family) +- return 0; +- +- return af1->cmp_addr(addr1, addr2); ++ return __sctp_v6_cmp_addr(addr1, addr2); + } + + /* Verify that the provided sockaddr looks bindable. Common verification, +diff --git a/net/strparser/strparser.c b/net/strparser/strparser.c +index 6cbc935ddd96..bbee334ab1b0 100644 +--- a/net/strparser/strparser.c ++++ b/net/strparser/strparser.c +@@ -285,9 +285,9 @@ static int strp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb, + strp_start_rx_timer(strp); + } + ++ rxm->accum_len += cand_len; + strp->rx_need_bytes = rxm->strp.full_len - + rxm->accum_len; +- rxm->accum_len += cand_len; + rxm->early_eaten = cand_len; + STRP_STATS_ADD(strp->stats.rx_bytes, cand_len); + desc->count = 0; /* Stop reading socket */ +@@ -310,6 +310,7 @@ static int strp_recv(read_descriptor_t *desc, struct sk_buff *orig_skb, + /* Hurray, we have a new message! */ + del_timer(&strp->rx_msg_timer); + strp->rx_skb_head = NULL; ++ strp->rx_need_bytes = 0; + STRP_STATS_INCR(strp->stats.rx_msgs); + + /* Give skb to upper layer */ +@@ -374,9 +375,7 @@ void strp_data_ready(struct strparser *strp) + return; + + if (strp->rx_need_bytes) { +- if (strp_peek_len(strp) >= strp->rx_need_bytes) +- strp->rx_need_bytes = 0; +- else ++ if (strp_peek_len(strp) < strp->rx_need_bytes) + return; + } + +diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c +index 3200059d14b2..9ba3c462f86e 100644 +--- a/net/tipc/netlink.c ++++ b/net/tipc/netlink.c +@@ -79,7 +79,8 @@ const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { + + const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = { + [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC }, +- [TIPC_NLA_NET_ID] = { .type = NLA_U32 } ++ [TIPC_NLA_NET_ID] = { .type = NLA_U32 }, ++ [TIPC_NLA_NET_ADDR] = { .type = NLA_U32 }, + }; + + const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = { +diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c +index 4bc58822416c..d2c6cdd9d42b 100644 +--- a/tools/perf/util/dso.c ++++ b/tools/perf/util/dso.c +@@ -366,23 +366,7 @@ static int __open_dso(struct dso *dso, struct machine *machine) + if (!is_regular_file(name)) + return -EINVAL; + +- if (dso__needs_decompress(dso)) { +- char newpath[KMOD_DECOMP_LEN]; +- size_t len = sizeof(newpath); +- +- if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { +- free(name); +- return -dso->load_errno; +- } +- +- strcpy(name, newpath); +- } +- + fd = do_open(name); +- +- if (dso__needs_decompress(dso)) +- unlink(name); +- + free(name); + return fd; + } |