netdev - Re: [PATCH] net: handle no dst on skb in icmp6

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Message-Id: <20161128.161344.1778661062306703117.davem@davemloft.net>
Date:   Mon, 28 Nov 2016 16:13:44 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     dsa@...ulusnetworks.com
Cc:     netdev@...r.kernel.org, andreyknvl@...gle.com
Subject: Re: [PATCH] net: handle no dst on skb in icmp6_send

From: David Ahern <dsa@...ulusnetworks.com>
Date: Sun, 27 Nov 2016 18:52:53 -0800

> Andrey reported the following while fuzzing the kernel with syzkaller:
 ...
> icmp6_send / icmpv6_send is invoked for both rx and tx paths. In both
> cases the dst->dev should be preferred for determining the L3 domain
> if the dst has been set on the skb. Fallback to the skb->dev if it has
> not. This covers the case reported here where icmp6_send is invoked on
> Rx before the route lookup.
> 
> Fixes: 5d41ce29e ("net: icmp6_send should use dst dev to determine L3 domain")
> Reported-by: Andrey Konovalov <andreyknvl@...gle.com>
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>

Applied, thanks David.