Shawn Bohrer 6e54030932 ipv4/udp: Verify multicast group is ours in upd_v4_early_demux()
421b3885bf6d56391297844f43fb7154a6396e12 "udp: ipv4: Add udp early
demux" introduced a regression that allowed sockets bound to INADDR_ANY
to receive packets from multicast groups that the socket had not joined.
For example a socket that had joined 224.168.2.9 could also receive
packets from 225.168.2.9 despite not having joined that group if
ip_early_demux is enabled.

Fix this by calling ip_check_mc_rcu() in udp_v4_early_demux() to verify
that the multicast packet is indeed ours.

Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Reported-by: Yurij M. Plotnikov <Yurij.Plotnikov@oktetlabs.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-06-04 00:46:26 -07:00
..
2014-09-18 10:54:36 +02:00
2013-12-29 16:34:25 -05:00
2015-04-07 22:24:37 -04:00
2015-05-22 14:23:40 -04:00
2015-01-28 22:18:37 -08:00
2014-09-01 18:12:45 -07:00
2014-09-01 18:12:45 -07:00
2014-09-01 18:12:45 -07:00
2015-02-28 16:56:51 -05:00
2014-09-01 18:12:45 -07:00
2015-01-28 22:18:37 -08:00
2015-01-28 22:18:37 -08:00
2015-01-28 22:18:37 -08:00
2014-05-23 16:28:53 -04:00