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| author | Eric Dumazet <edumazet@google.com> | 2015-10-09 20:29:32 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-13 04:42:38 +0200 |
| commit | 161642e24fee40fba2c5bc2ceacc00d118a22d65 (patch) | |
| tree | 41342a8fa391439d545b19145c23b33af9416a6d /net/ipv4/ip_input.c | |
| parent | Merge tag 'wireless-drivers-next-for-davem-2015-10-09' of git://git.kernel.or... (diff) | |
| download | linux-161642e24fee40fba2c5bc2ceacc00d118a22d65.tar.xz linux-161642e24fee40fba2c5bc2ceacc00d118a22d65.zip | |
packet: fix match_fanout_group()
Recent TCP listener patches exposed a prior af_packet bug :
match_fanout_group() blindly assumes it is always safe
to cast sk to a packet socket to compare fanout with af_packet_priv
But SYNACK packets can be sent while attached to request_sock, which
are smaller than a "struct sock".
We can read non existent memory and crash.
Fixes: c0de08d04215 ("af_packet: don't emit packet on orig fanout group")
Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Eric Leblond <eric@regit.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_input.c')
0 files changed, 0 insertions, 0 deletions