| From | Willy Tarreau <> | Subject | [PATCH 3.10 023/268] CIFS: Fix a possible memory corruption in push locks | Date | Mon, 19 Jun 2017 20:28:42 +0200 |
| |
From: Pavel Shilovsky <pshilov@microsoft.com>
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: Willy Tarreau <w@1wt.eu> --- fs/cifs/smb2file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index d801f63..866caf1 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -266,7 +266,7 @@ 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; } -- 2.8.0.rc2.1.gbe9624a
|