Commit e3d240e9 authored by Pavel Shilovsky's avatar Pavel Shilovsky
Browse files

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: default avatarPavel Shilovsky <pshilov@microsoft.com>
parent 4772c795

fs/cifs/smb2file.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

	}