From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50684 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030836AbdADN6n (ORCPT ); Wed, 4 Jan 2017 08:58:43 -0500 Subject: Patch "CIFS: Fix a possible memory corruption in push locks" has been added to the 4.4-stable tree To: pshilov@microsoft.com, gregkh@linuxfoundation.org Cc: , From: Date: Wed, 04 Jan 2017 14:58:51 +0100 Message-ID: <14835383312430@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled CIFS: Fix a possible memory corruption in push locks to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cifs-fix-a-possible-memory-corruption-in-push-locks.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From e3d240e9d505fc67f8f8735836df97a794bbd946 Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Tue, 29 Nov 2016 16:14:43 -0800 Subject: CIFS: Fix a possible memory corruption in push locks From: Pavel Shilovsky 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 Signed-off-by: Greg Kroah-Hartman --- fs/cifs/smb2file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -260,7 +260,7 @@ smb2_push_mandatory_locks(struct cifsFil * 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; } Patches currently in stable-queue which might be from pshilov@microsoft.com are queue-4.4/cifs-fix-missing-nls-unload-in-smb2_reconnect.patch queue-4.4/cifs-fix-a-possible-memory-corruption-in-push-locks.patch queue-4.4/cifs-fix-a-possible-memory-corruption-during-reconnect.patch