[PATCH 4.9 033/102] selinux: Remove redundant check for unknown labeling behavior

From: Greg Kroah-Hartman
Date: Fri Apr 06 2018 - 10:38:38 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Matthias Kaehlcke <mka@xxxxxxxxxxxx>

commit 270e8573145a26de924e2dc644596332d400445b upstream.

The check is already performed in ocontext_read() when the policy is
loaded. Removing the array also fixes the following warning when
building with clang:

security/selinux/hooks.c:338:20: error: variable 'labeling_behaviors'
is not needed and will not be emitted
[-Werror,-Wunneeded-internal-declaration]

Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Acked-by: Stephen Smalley <sds@xxxxxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Cc: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
security/selinux/hooks.c | 16 ----------------
1 file changed, 16 deletions(-)

--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -406,18 +406,6 @@ static void superblock_free_security(str
kfree(sbsec);
}

-/* The file system's label must be initialized prior to use. */
-
-static const char *labeling_behaviors[7] = {
- "uses xattr",
- "uses transition SIDs",
- "uses task SIDs",
- "uses genfs_contexts",
- "not configured for labeling",
- "uses mountpoint labeling",
- "uses native labeling",
-};
-
static inline int inode_doinit(struct inode *inode)
{
return inode_doinit_with_dentry(inode, NULL);
@@ -528,10 +516,6 @@ static int sb_finish_set_opts(struct sup
}
}

- if (sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
- printk(KERN_ERR "SELinux: initialized (dev %s, type %s), unknown behavior\n",
- sb->s_id, sb->s_type->name);
-
sbsec->flags |= SE_SBINITIALIZED;
if (selinux_is_sblabel_mnt(sb))
sbsec->flags |= SBLABEL_MNT;