linux-kernel - Re: 2.6.37-rc8: Reported regressions from 2.6.36

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Message-Id: <20110110.000813.173856001.davem@davemloft.net>
Date:	Mon, 10 Jan 2011 00:08:13 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	rjw@...k.pl
Cc:	linux-kernel@...r.kernel.org, maciej.rutecki@...il.com,
	florian@...kler.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, kernel-testers@...r.kernel.org,
	netdev@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org, linux-scsi@...r.kernel.org,
	linux-wireless@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: 2.6.37-rc8: Reported regressions from 2.6.36

From: "Rafael J. Wysocki" <rjw@...k.pl>
Date: Wed, 29 Dec 2010 23:59:38 +0100 (CET)

> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=24592
> Subject		: 2.6.37-rc5: NULL pointer oops in selinux_socket_unix_stream_connect
> Submitter	: Jeremy Fitzhardinge <jeremy@...p.org>
> Date		: 2010-12-08 21:09 (22 days old)
> Message-ID	: <4CFFF3F3.90100@...p.org>
> References	: http://marc.info/?l=linux-kernel&m=129184256629712&w=2

This bug is intended to be fixed by:

commit 3610cda53f247e176bcbb7a7cca64bc53b12acdb
Author: David S. Miller <davem@...emloft.net>
Date:   Wed Jan 5 15:38:53 2011 -0800

    af_unix: Avoid socket->sk NULL OOPS in stream connect security hooks.
    
    unix_release() can asynchornously set socket->sk to NULL, and
    it does so without holding the unix_state_lock() on "other"
    during stream connects.
    
    However, the reverse mapping, sk->sk_socket, is only transitioned
    to NULL under the unix_state_lock().
    
    Therefore make the security hooks follow the reverse mapping instead
    of the forward mapping.
    
    Reported-by: Jeremy Fitzhardinge <jeremy@...p.org>
    Reported-by: Linus Torvalds <torvalds@...ux-foundation.org>
    Signed-off-by: David S. Miller <davem@...emloft.net>

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