netdev - Re: [PATCH] net: tcp: check skb is non-NULL for exact match on lookups

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Message-Id: <20161103.160625.1817596298692975304.davem@davemloft.net>
Date:   Thu, 03 Nov 2016 16:06:25 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     dsa@...ulusnetworks.com
Cc:     netdev@...r.kernel.org, andreyknvl@...gle.com
Subject: Re: [PATCH] net: tcp: check skb is non-NULL for exact match on
 lookups

From: David Ahern <dsa@...ulusnetworks.com>
Date: Wed,  2 Nov 2016 12:08:25 -0700

> Andrey reported the following error report while running the syzkaller
> fuzzer:
 ...
> MD5 has a code path that calls __inet_lookup_listener with a null skb,
> so inet{6}_exact_dif_match needs to check skb against null before pulling
> the flag.
> 
> Fixes: a04a480d4392 ("net: Require exact match for TCP socket lookups if
>        dif is l3mdev")
> Reported-by: Andrey Konovalov <andreyknvl@...gle.com>
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
> ---
> Dave: commit a04a480d4392 was queued for stable, so this needs to follow it.

Applied and queued up for -stable, thanks.