linux-kernel - Re: net: use-after-free in recvmmsg

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Date:	Thu, 10 Mar 2016 19:35:57 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: net: use-after-free in recvmmsg

On Tue, Jan 26, 2016 at 8:30 PM, Arnaldo Carvalho de Melo
<acme@...hat.com> wrote:
> Em Tue, Jan 26, 2016 at 08:27:48PM +0100, Dmitry Vyukov escreveu:
>> On Fri, Jan 22, 2016 at 10:16 PM, Arnaldo Carvalho de Melo <acme@...hat.com> wrote:
>> > Em Fri, Jan 22, 2016 at 09:39:53PM +0100, Dmitry Vyukov escreveu:
>> >> I am on commit 30f05309bde49295e02e45c7e615f73aa4e0ccc2 (Jan 20).
>> >> Seems to be added in commit a2e2725541fad72416326798c2d7fa4dafb7d337
>> >> (Oct 2009).
>> >
>> > Maybe this helps? Compile testing now...
>>
>>
>> I don't have a reliable reproducer, so can't test it per se.
>> I will integrate this patch tomorrow and restart fuzzer with it.
>
> Thanks a lot!


Hi Arnaldo,

I am running with that patch since then, and did not see the bug.
Please mail it as a proper patch.