From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: [PATCH] netns: Only route multicast trafic in init_net Date: Fri, 11 Jul 2008 13:02:04 -0700 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: To: David Miller Return-path: Received: from out02.mta.xmission.com ([166.70.13.232]:44198 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754539AbYGKUMB (ORCPT ); Fri, 11 Jul 2008 16:12:01 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Currently the code to only support multicast traffic in the initial namespace is incomplete, and receiving a multicast packet causes in a network namespace causes us to take an initialized lock. Resulting in a nasty oops. Ouch! So until we have network namespace support in igmp.c simply disable multicast packet reception. Signed-off-by: Eric W. Biederman --- net/ipv4/igmp.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 2769dc4..12201ac 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -2277,6 +2277,9 @@ int ip_check_mc(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u16 p struct ip_sf_list *psf; int rv = 0; + if (dev_net(in_dev->dev) != &init_net) + return rv; + read_lock(&in_dev->mc_list_lock); for (im=in_dev->mc_list; im; im=im->next) { if (im->multiaddr == mc_addr) -- 1.5.3.rc6.17.g1911