linux-kernel - Re: crypto: use-after-free in hash_sock_destruct

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Message-ID: <CACT4Y+ab_8UnsYzCP6ZhZD_PUCVJ==r_OcO+O+mcd33mqDGozQ@mail.gmail.com>
Date:	Wed, 13 Jan 2016 11:27:18 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	syzkaller <syzkaller@...glegroups.com>
Subject: Re: crypto: use-after-free in hash_sock_destruct_common

On Wed, Jan 13, 2016 at 11:25 AM, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> On Wed, Jan 13, 2016 at 7:57 AM, Herbert Xu <herbert@...dor.apana.org.au>
> wrote:
>>
>> On Tue, Jan 12, 2016 at 07:31:03PM +0100, Dmitry Vyukov wrote:
>> >
>> > The following program triggers use-after-free in
>> > hash_sock_destruct_common. This is on master of
>> > git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git
>> > (cd7e98414462b9db70067ac29896c58210b13b69). I've also seen a similar
>> > crash in skcipher_sock_destruct_common.
>>
>> OK the new compatibility nokey path introduced some new problems.
>> Please try the following patches.
>
>
> Yes, these 4 patches fix the crash for me. Thanks for quick fix!
>
> Tested-by: Dmitry Vyukov <dvyukov@...gle.com>

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