netdev - Re: [Patch net] ping: fix a null pointer dereference

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Message-Id: <20170208.135852.779430967423827569.davem@davemloft.net>
Date:   Wed, 08 Feb 2017 13:58:52 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     xiyou.wangcong@...il.com
Cc:     netdev@...r.kernel.org, andreyknvl@...gle.com, dvyukov@...gle.com
Subject: Re: [Patch net] ping: fix a null pointer dereference

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Tue,  7 Feb 2017 12:59:46 -0800

> Andrey reported a kernel crash:
 ...
> This is because we miss a check for NULL pointer for skb_peek() when
> the queue is empty. Other places already have the same check.
> 
> Fixes: c319b4d76b9e ("net: ipv4: add IPPROTO_ICMP socket kind")
> Reported-by: Andrey Konovalov <andreyknvl@...gle.com>
> Tested-by: Andrey Konovalov <andreyknvl@...gle.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

Applied and queued up for -stable, thanks Cong.