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

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Date:	Wed, 13 Jan 2016 14:57:29 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Dmitry Vyukov <dvyukov@...gle.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: crypto: use-after-free in hash_sock_destruct_common

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.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt