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From: Anthony G. Basile <blueness@gentoo.org>
For users that emerge without XATTR_PAX support enabled, we still want user.pax.flags
namespace supported on tmpfs so that the PaX markings survive emerge.
diff -Naur a/mm/shmem.c b/mm/shmem.c
--- a/mm/shmem.c 2016-04-29 19:56:25.306101147 -0400
+++ b/mm/shmem.c 2016-04-29 19:59:44.126104490 -0400
@@ -2670,24 +2670,20 @@
return simple_xattr_set(&info->xattrs, name, value, size, flags);
}
-#ifdef CONFIG_PAX_XATTR_PAX_FLAGS
static int shmem_user_xattr_handler_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
-#ifdef CONFIG_PAX_XATTR_PAX_FLAGS
if (strcmp(name, XATTR_NAME_PAX_FLAGS))
return -EOPNOTSUPP;
if (size > 8)
return -EINVAL;
-#endif
name = xattr_full_name(handler, name);
return simple_xattr_set(&info->xattrs, name, value, size, flags);
}
-#endif
static const struct xattr_handler shmem_security_xattr_handler = {
.prefix = XATTR_SECURITY_PREFIX,
@@ -2701,13 +2697,11 @@
.set = shmem_xattr_handler_set,
};
-#ifdef CONFIG_PAX_XATTR_PAX_FLAGS
static const struct xattr_handler shmem_user_xattr_handler = {
.prefix = XATTR_USER_PREFIX,
.get = shmem_xattr_handler_get,
.set = shmem_user_xattr_handler_set,
};
-#endif
static const struct xattr_handler *shmem_xattr_handlers[] = {
#ifdef CONFIG_TMPFS_POSIX_ACL
@@ -2717,9 +2711,7 @@
&shmem_security_xattr_handler,
&shmem_trusted_xattr_handler,
-#ifdef CONFIG_PAX_XATTR_PAX_FLAGS
&shmem_user_xattr_handler,
-#endif
NULL
};
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