From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 2 Nov 2011 22:47:44 +0000 (+0000)
Subject: l2tp: fix race in l2tp_recv_dequeue()
X-Git-Tag: v3.2-rc1~68^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2e210c0238eb7073e07af503ae743fa53977120;p=pandora-kernel.git

l2tp: fix race in l2tp_recv_dequeue()

Misha Labjuk reported panics occurring in l2tp_recv_dequeue()

If we release reorder_q.lock, we must not keep a dangling pointer (tmp),
since another thread could manipulate reorder_q.

Instead we must restart the scan at beginning of list.

Reported-by: Misha Labjuk <spiked.yar@gmail.com>
Tested-by: Misha Labjuk <spiked.yar@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed