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| author | Pavel Shilovsky <pshilov@microsoft.com> | 2016-11-29 16:14:43 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-01-15 09:49:51 -0500 |
| commit | be79af5f784536bb160e10715a2d198a6a112f44 (patch) | |
| tree | 86bd454c672d350fce3f3b237ee6aa9a8e4a726b | |
| parent | 6ec5ca625b5459506bcdcafd3594b559c90a9f1a (diff) | |
| download | linux-stable-be79af5f784536bb160e10715a2d198a6a112f44.tar.gz linux-stable-be79af5f784536bb160e10715a2d198a6a112f44.tar.bz2 linux-stable-be79af5f784536bb160e10715a2d198a6a112f44.zip | |
CIFS: Fix a possible memory corruption in push locks
[ Upstream commit e3d240e9d505fc67f8f8735836df97a794bbd946 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -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 45992944e238..b87b07504947 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -241,7 +241,7 @@ 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; } |