tree: https://git.kernel.org/pub/scm/linux/kernel/git/lee/linux.git android-3.18-preview head: 526bdffeeee871435784efbb217ddbe3e364eecb commit: eb203cfa01ca7a7e97f8ca304a3b47bfff68a4d3 [593/627] tcp: fix NULL deref in tcp_v4_send_ack() If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; smatch warnings: net/ipv4/tcp_ipv4.c:792 tcp_v4_timewait_ack() warn: inconsistent indenting vim +792 net/ipv4/tcp_ipv4.c 786 787 static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb) 788 { 789 struct inet_timewait_sock *tw = inet_twsk(sk); 790 struct tcp_timewait_sock *tcptw = tcp_twsk(sk); 791 793 tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt, 794 tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, 795 tcp_time_stamp + tcptw->tw_ts_offset, 796 tcptw->tw_ts_recent, 797 tw->tw_bound_dev_if, 798 tcp_twsk_md5_key(tcptw), 799 tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0, 800 tw->tw_tos 801 ); 802 803 inet_twsk_put(tw); 804 } 805 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org