diff options
| author | Pavel Shilovsky <pshilov@microsoft.com> | 2016-11-29 16:14:43 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-06 10:40:16 +0100 |
| commit | c954acc0007bf2a33a34505e21bc5d617a2fe2aa (patch) | |
| tree | 2b56dbe738c5ff7603f7ba040e38086497beab50 /fs/cifs | |
| parent | 9f9d98246e5f7e70cf661be2253c75f4185b60a6 (diff) | |
CIFS: Fix a possible memory corruption in push locks
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@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
| -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; } |