From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] sctp: do not leak kernel memory to user space
Date: Sun, 08 Apr 2018 10:32:28 -0400 (EDT)
Message-ID: <20180408.103228.2196714632269620008.davem@davemloft.net>
References: <20180408001522.110590-1-edumazet@google.com>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com
To: edumazet@google.com
Return-path: <netdev-owner@vger.kernel.org>
Received: from shards.monkeyblade.net ([184.105.139.130]:50674 "EHLO
        shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751402AbeDHOcc (ORCPT
        <rfc822;netdev@vger.kernel.org>); Sun, 8 Apr 2018 10:32:32 -0400
In-Reply-To: <20180408001522.110590-1-edumazet@google.com>
Sender: netdev-owner@vger.kernel.org
List-ID: <netdev.vger.kernel.org>

From: Eric Dumazet <edumazet@google.com>
Date: Sat,  7 Apr 2018 17:15:22 -0700

> syzbot produced a nice report [1]
> 
> Issue here is that a recvmmsg() managed to leak 8 bytes of kernel memory
> to user space, because sin_zero (padding field) was not properly cleared.
 ...
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> Cc:	Vlad Yasevich <vyasevich@gmail.com>
> Cc:	Neil Horman <nhorman@tuxdriver.com>
> Reported-by: syzbot <syzkaller@googlegroups.com>

Applied and queued up for -stable, thanks Eric.