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Groups > linux.kernel > #1280925 > unrolled thread

Re: net: Use after free in dst_release on boot

Started byHannes Frederic Sowa <hannes@stressinduktion.org>
First post2015-12-01 16:10 +0100
Last post2015-12-01 16:30 +0100
Articles 2 — 2 participants

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  Re: net: Use after free in dst_release on boot Hannes Frederic Sowa <hannes@stressinduktion.org> - 2015-12-01 16:10 +0100
    Re: net: Use after free in dst_release on boot Eric Dumazet <eric.dumazet@gmail.com> - 2015-12-01 16:30 +0100

#1280925 — Re: net: Use after free in dst_release on boot

FromHannes Frederic Sowa <hannes@stressinduktion.org>
Date2015-12-01 16:10 +0100
SubjectRe: net: Use after free in dst_release on boot
Message-ID<qAUJ3-2Pr-3@gated-at.bofh.it>
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@google.com>
Date:   Mon Nov 9 17:51:23 2015 -0800

    net: fix a race in dst_release()

Thanks,
Hannes
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#1280964

FromEric Dumazet <eric.dumazet@gmail.com>
Date2015-12-01 16:30 +0100
Message-ID<qAV2r-2WT-27@gated-at.bofh.it>
In reply to#1280925
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@google.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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