linux-kernel - Re: [PATCH] ipv6: Fix NULL pointer dereference with time-wait sockets

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Date:	Sat, 11 Apr 2009 01:45:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	vladislav.yasevich@...com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipv6: Fix NULL pointer dereference with time-wait
 sockets

From: Vlad Yasevich <vladislav.yasevich@...com>
Date: Thu,  9 Apr 2009 23:37:33 -0400

> Commit b2f5e7cd3dee2ed721bf0675e1a1ddebb849aee6
> (ipv6: Fix conflict resolutions during ipv6 binding)
> introduced a regression where time-wait sockets were
> not treated correctly.  This resulted in the following:
> 
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000062
> IP: [<ffffffff805d7d61>] ipv4_rcv_saddr_equal+0x61/0x70
> ...
> Call Trace:
> [<ffffffffa033847b>] ipv6_rcv_saddr_equal+0x1bb/0x250 [ipv6]
> [<ffffffffa03505a8>] inet6_csk_bind_conflict+0x88/0xd0 [ipv6]
> [<ffffffff805bb18e>] inet_csk_get_port+0x1ee/0x400
> [<ffffffffa0319b7f>] inet6_bind+0x1cf/0x3a0 [ipv6]
> [<ffffffff8056d17c>] ? sockfd_lookup_light+0x3c/0xd0
> [<ffffffff8056ed49>] sys_bind+0x89/0x100
> [<ffffffff80613ea2>] ? trace_hardirqs_on_thunk+0x3a/0x3c
> [<ffffffff8020bf9b>] system_call_fastpath+0x16/0x1b
> 
> Tested-by: Brian Haley <brian.haley@...com>
> Tested-by: Ed Tomlinson <edt@....ca>
> Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>

Applied, thanks Vlad.
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