linux

Willem de Bruijn 70abad3796 packet: in packet_do_bind, test fanout with bind_lock held commit `4971613c16` upstream. Once a socket has po->fanout set, it remains a member of the group until it is destroyed. The prot_hook must be constant and identical across sockets in the group. If fanout_add races with packet_do_bind between the test of po->fanout and taking the lock, the bind call may make type or dev inconsistent with that of the fanout group. Hold po->bind_lock when testing po->fanout to avoid this race. I had to introduce artificial delay (local_bh_enable) to actually observe the race. Fixes: `dc99f60069` ("packet: Add fanout support.") Signed-off-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>		History 2017-11-11 13:33:38 +00:00
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af_packet.c	packet: in packet_do_bind, test fanout with bind_lock held	2017-11-11 13:33:38 +00:00
diag.c	net: Use netlink_ns_capable to verify the permisions of netlink messages	2014-04-24 13:44:54 -04:00
internal.h	packet: handle too big packets for PACKET_V3	2014-10-15 12:05:27 +02:00
Kconfig	packet: Diag core and basic socket info dumping	2012-08-14 16:56:33 -07:00
Makefile	packet: Diag core and basic socket info dumping	2012-08-14 16:56:33 -07:00