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| author | Shawn Bohrer <sbohrer@rgmadvisors.com> | 2015-06-04 00:27:38 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-04 10:46:26 +0300 |
| commit | 6e540309326188f769e03bb4c6dd8ff6752930c2 (patch) | |
| tree | 5e024fab9cf5bd0affa537c2c04389daa551d022 /net/packet | |
| parent | 640b2b107cec23c754214b62a811465fa8f9257f (diff) | |
| download | linux-6e540309326188f769e03bb4c6dd8ff6752930c2.tar.xz | |
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>
Diffstat (limited to 'net/packet')
0 files changed, 0 insertions, 0 deletions