From: Flavio Leitner <fleitner@redhat.com>
Date: Tue, 2 Feb 2010 15:32:29 +0000 (-0800)
Subject: igmp: fix ip_mc_sf_allow race [v5]
X-Git-Tag: v2.6.34-rc1~233^2~475
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c85bb41e93184bf5494dde6d8fe5a81b564c84c8;p=pandora-kernel.git

igmp: fix ip_mc_sf_allow race [v5]

Almost all igmp functions accessing inet->mc_list are protected by
rtnl_lock(), but there is one exception which is ip_mc_sf_allow(),
so there is a chance of either ip_mc_drop_socket or ip_mc_leave_group
remove an entry while ip_mc_sf_allow is running causing a crash.

Signed-off-by: Flavio Leitner <fleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed