Willem de Bruijn a6361f0ca4 packet: fix bitfield update race ... Updates to the bitfields in struct packet_sock are not atomic. Serialize these read-modify-write cycles. Move po->running into a separate variable. Its writes are protected by po->bind_lock (except for one startup case at packet_create). Also replace a textual precondition warning with lockdep annotation. All others are set only in packet_setsockopt. Serialize these updates by holding the socket lock. Analogous to other field updates, also hold the lock when testing whether a ring is active (pg_vec). Fixes: 8dc4194474 ("[PACKET]: Add optional checksum computation for recvmsg") Reported-by: DaeRyong Jeong <threeearcat@gmail.com> Reported-by: Byoungyoung Lee <byoungyoung@purdue.edu> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-04-24 13:17:08 -04:00
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af_packet.c	packet: fix bitfield update race	2018-04-24 13:17:08 -04:00
diag.c
internal.h	packet: fix bitfield update race	2018-04-24 13:17:08 -04:00
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