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authorEric Dumazet <edumazet@google.com>2015-10-09 11:29:32 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-12 19:42:38 -0700
commit161642e24fee40fba2c5bc2ceacc00d118a22d65 (patch)
tree41342a8fa391439d545b19145c23b33af9416a6d /net/ipv4/ip_input.c
parentMerge tag 'wireless-drivers-next-for-davem-2015-10-09' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next (diff)
downloadlinux-dev-161642e24fee40fba2c5bc2ceacc00d118a22d65.tar.xz
linux-dev-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')
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