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Message-ID: <1446752806.4184.50.camel@edumazet-glaptop2.roam.corp.google.com>
Date: Thu, 05 Nov 2015 11:46:46 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Eric Dumazet <edumazet@...gle.com>,
Pablo Neira Ayuso <pablo@...filter.org>,
Patrick McHardy <kaber@...sh.net>,
Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
David Miller <davem@...emloft.net>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
James Morris <jmorris@...ei.org>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Sasha Levin <sasha.levin@...cle.com>,
Kees Cook <keescook@...gle.com>,
Julien Tinnes <jln@...gle.com>,
Kostya Serebryany <kcc@...gle.com>,
Alexander Potapenko <glider@...gle.com>,
netdev <netdev@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
syzkaller <syzkaller@...glegroups.com>
Subject: Re: Use-after-free in selinux_ip_postroute_compat
On Thu, 2015-11-05 at 20:36 +0100, Dmitry Vyukov wrote:
> Hello,
>
> I've updated from bcee19f424a0d8c26ecf2607b73c690802658b29 (Sep 21) to
> 8e483ed1342a4ea45b70f0f33ac54eff7a33d918 (Nov 4) and start seeing the
> following use-after-free reports:
>
Thanks for your report, I will add a followup to this fix :
commit e446f9dfe17bbaa76a1fe22912636f38be1e1af8
Author: Eric Dumazet <edumazet@...gle.com>
Date: Thu Oct 8 05:01:55 2015 -0700
net: synack packets can be attached to request sockets
selinux needs few changes to accommodate fact that SYNACK messages
can be attached to a request socket, lacking sk_security pointer
(Only syncookies are still attached to a TCP_LISTEN socket)
Adds a new sk_listener() helper, and use it in selinux and sch_fq
Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Reported by: kernel test robot <ying.huang@...ux.intel.com>
Cc: Paul Moore <paul@...l-moore.com>
Cc: Stephen Smalley <sds@...ho.nsa.gov>
Cc: Eric Paris <eparis@...isplace.org>
Acked-by: Paul Moore <paul@...l-moore.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
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