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author | Shawn Bohrer <sbohrer@rgmadvisors.com> | 2015-06-03 16:27:38 -0500 |
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committer | Sasha Levin <sasha.levin@oracle.com> | 2015-06-15 14:26:54 -0400 |
commit | eee3f32977fe915c59a5abf5e312d66ac387d389 (patch) | |
tree | f85e989898a8fd33402372a51ffc91fefd325c96 /sound | |
parent | fe38ed618ce5e0f8c7f7e9f47497c3637a0ffbd2 (diff) |
ipv4/udp: Verify multicast group is ours in upd_v4_early_demux()
[ Upstream commit 6e540309326188f769e03bb4c6dd8ff6752930c2 ]
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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions