linux-kernel - Re: net: Use after free in dst

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Message-ID: <1448983778.25582.34.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 01 Dec 2015 07:29:38 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	Sasha Levin <sasha.levin@...cle.com>, davem@...emloft.net,
	kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org, kaber@...sh.net,
	netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: net: Use after free in dst_release on boot

On Tue, 2015-12-01 at 16:04 +0100, Hannes Frederic Sowa wrote:
> Hi,
> 
> On Fri, Nov 27, 2015, at 21:48, Sasha Levin wrote:
> > [  117.057618] BUG: KASAN: use-after-free in dst_release+0x9a/0xc0 at
> > addr ffff8806cf7c7560
> > 
> > [  117.058566] Read of size 2 by task swapper/0/1
> > 
> 
> Can you check if the following commit was already applied? net wasn't
> merged into net-next for a while.
> 
> commit d69bbf88c8d0b367cf3e3a052f6daadf630ee566
> Author: Eric Dumazet <edumazet@...gle.com>
> Date:   Mon Nov 9 17:51:23 2015 -0800
> 
>     net: fix a race in dst_release()

Yes, this most definitely is the fix for this problem.

Thanks Hannes !


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