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| author | Pavel Shilovsky <pshilov@microsoft.com> | 2016-11-29 16:14:43 -0800 |
|---|---|---|
| committer | Pavel Shilovsky <pshilov@microsoft.com> | 2016-12-05 11:08:55 -0800 |
| commit | e3d240e9d505fc67f8f8735836df97a794bbd946 (patch) | |
| tree | 3c40fb55ccc300c2f34cdcbbdfc1a715d069df38 /fs | |
| parent | 4772c79599564bd08ee6682715a7d3516f67433f (diff) | |
| download | linux-e3d240e9d505fc67f8f8735836df97a794bbd946.tar.gz linux-e3d240e9d505fc67f8f8735836df97a794bbd946.tar.bz2 linux-e3d240e9d505fc67f8f8735836df97a794bbd946.zip | |
CIFS: Fix a possible memory corruption in push locks
If maxBuf is not 0 but less than a size of SMB2 lock structure
we can end up with a memory corruption.
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/smb2file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index f9e766f464be..b2aff0c6f22c 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -260,7 +260,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) * 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; } |