From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Fri, 29 Nov 2013 05:39:44 +0000 (+0100)
Subject: ipv6: fix possible seqlock deadlock in ip6_finish_output2
X-Git-Tag: v3.2.54~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24e3644c3770b8b5914cd4e13c5594c41bb0d791;p=pandora-kernel.git

ipv6: fix possible seqlock deadlock in ip6_finish_output2

[ Upstream commit 7f88c6b23afbd31545c676dea77ba9593a1a14bf ]

IPv6 stats are 64 bits and thus are protected with a seqlock. By not
disabling bottom-half we could deadlock here if we don't disable bh and
a softirq reentrantly updates the same mib.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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