linux-kernel - Re: Use-after-free in ppoll

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Message-ID: <87vb8tq33z.fsf@doppelsaurus.mobileactivedefense.com>
Date:	Sun, 22 Nov 2015 18:51:44 +0000
From:	Rainer Weikusat <rweikusat@...ileactivedefense.com>
To:	Rainer Weikusat <rweikusat@...ileactivedefense.com>
Cc:	Dmitry Vyukov <dvyukov@...gle.com>,
	Jason Baron <jbaron@...mai.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	David Miller <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	netdev <netdev@...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: Use-after-free in ppoll

Rainer Weikusat <rweikusat@...ileactivedefense.com> writes:

[...]


> because of the close, this routine will be called with the peer_wait
> wait_queue_head of the non-closed socket of the socket pair as
> wait_address argument.

This should have been "peer_wait wait_queue_head of the peer of the
non-closed socket, ie, that of the closed socket"...
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