src/patches/linux-3.14.77-gsrec_tcp_input_access_once_rw.patch

   1 diff -Naur linux-3.14.77.org/net/ipv4/tcp_input.c linux-3.14.77/net/ipv4/tcp_input.c
   2 --- linux-3.14.77.org/net/ipv4/tcp_input.c      2016-08-21 19:58:45.000000000 +0200
   3 +++ linux-3.14.77/net/ipv4/tcp_input.c  2016-08-21 21:11:24.336757369 +0200
   4 @@ -3299,12 +3299,12 @@
   5                 u32 half = (sysctl_tcp_challenge_ack_limit + 1) >> 1;
   6
   7                 challenge_timestamp = now;
   8 -               ACCESS_ONCE(challenge_count) = half +
   9 +               ACCESS_ONCE_RW(challenge_count) = half +
  10                                   prandom_u32_max(sysctl_tcp_challenge_ack_limit);
  11         }
  12         count = ACCESS_ONCE(challenge_count);
  13         if (count > 0) {
  14 -               ACCESS_ONCE(challenge_count) = count - 1;
  15 +               ACCESS_ONCE_RW(challenge_count) = count - 1;
  16                 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPCHALLENGEACK);
  17                 tcp_send_ack(sk);
  18         }