From: Willem de Bruijn <willemdebruijn.ker...@gmail.com>
Date: Mon, 23 Apr 2018 17:37:03 -0400
> From: Willem de Bruijn <will...@google.com>
>
> 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: 8dc419447415 ("[PACKET]: Add optional checksum computation for
> recvmsg")
> Reported-by: DaeRyong Jeong <threeear...@gmail.com>
> Reported-by: Byoungyoung Lee <byoungyo...@purdue.edu>
> Signed-off-by: Willem de Bruijn <will...@google.com>
Looks good, applied and queued up for -stable.
Thanks for fixing this Willem.
