This is a note to let you know that I've just added the patch titled
CIFS: Fix a possible memory corruption in push locks
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs-fix-a-possible-memory-corruption-in-push-locks.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3d240e9d505fc67f8f8735836df97a794bbd946 Mon Sep 17 00:00:00 2001
From: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
Date: Tue, 29 Nov 2016 16:14:43 -0800
Subject: CIFS: Fix a possible memory corruption in push locks
From: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
commit e3d240e9d505fc67f8f8735836df97a794bbd946 upstream.
If maxBuf is not 0 but less than a size of SMB2 lock structure
we can end up with a memory corruption.
Signed-off-by: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/smb2file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -260,7 +260,7 @@ smb2_push_mandatory_locks(struct cifsFil
* and check it for zero before using.
*/
max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
- if (!max_buf) {
+ if (max_buf < sizeof(struct smb2_lock_element)) {
free_xid(xid);
return -EINVAL;
}
Patches currently in stable-queue which might be from pshilov@xxxxxxxxxxxxx are
queue-4.9/cifs-fix-missing-nls-unload-in-smb2_reconnect.patch
queue-4.9/cifs-decrease-verbosity-of-ioctl-call.patch
queue-4.9/cifs-fix-a-possible-double-locking-of-mutex-during-reconnect.patch
queue-4.9/cifs-fix-a-possible-memory-corruption-in-push-locks.patch
queue-4.9/cifs-fix-a-possible-memory-corruption-during-reconnect.patch
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