Commit e3d240e9 authored Nov 29, 2016 by Pavel Shilovsky

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>

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;
		}