BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor866/2077
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 2077 Comm: syz-executor866 Not tainted 4.4.157+ #37
 0000000000000000 226a55b35cb50a90 ffff8801d420f7d8 ffffffff81a559fd
 0000000000000000 ffffffff82928b40 ffffffff82a7b760 ffff8800b72a4740
 0000000000000002 ffff8801d420f818 ffffffff81af01fa ffff8801d420f828
Call Trace:
 [<ffffffff81a559fd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81a559fd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81af01fa>] check_preemption_disabled.cold.0+0x7f/0x8b lib/smp_processor_id.c:46
 [<ffffffff81ab2e0c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff8238d38a>] tcp_try_coalesce+0x22a/0x4c0 net/ipv4/tcp_input.c:4293
 [<ffffffff8238d747>] tcp_queue_rcv+0x127/0x6f0 net/ipv4/tcp_input.c:4500
 [<ffffffff823a21c6>] tcp_send_rcvq+0x3a6/0x470 net/ipv4/tcp_input.c:4546
 [<ffffffff8237a3cc>] tcp_sendmsg+0x237c/0x2b30 net/ipv4/tcp.c:1134
 [<ffffffff82426413>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff8215b17b>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff8215b17b>] sock_sendmsg+0xbb/0x110 net/socket.c:648
 [<ffffffff8215f380>] SYSC_sendto net/socket.c:1678 [inline]
 [<ffffffff8215f380>] SyS_sendto+0x220/0x370 net/socket.c:1646
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