BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor142/2098
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 2098 Comm: syz-executor142 Not tainted 4.4.162+ #7
 0000000000000000 17525ac7b6c0d862 ffff8801d3b176e0 ffffffff81a994bd
 0000000000000000 ffffffff82929a00 ffffffff82a7c6e0 ffff8800b71e8000
 0000000000000002 ffff8801d3b17720 ffffffff81b34f7a ffff8801d3b17730
Call Trace:
 [<ffffffff81a994bd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81a994bd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81b34f7a>] check_preemption_disabled.cold.0+0x7f/0x8b lib/smp_processor_id.c:46
 [<ffffffff81af769c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff823fd80a>] tcp_try_coalesce+0x22a/0x4c0 net/ipv4/tcp_input.c:4293
 [<ffffffff823fdbc7>] tcp_queue_rcv+0x127/0x6f0 net/ipv4/tcp_input.c:4539
 [<ffffffff82411ec6>] tcp_send_rcvq+0x3a6/0x470 net/ipv4/tcp_input.c:4585
 [<ffffffff823ea6dc>] tcp_sendmsg+0x237c/0x2b30 net/ipv4/tcp.c:1134
 [<ffffffff82496493>] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821c376b>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821c376b>] sock_sendmsg+0xbb/0x110 net/socket.c:648
 [<ffffffff821c39e3>] sock_write_iter+0x223/0x3b0 net/socket.c:847
 [<ffffffff81490e04>] new_sync_write fs/read_write.c:478 [inline]
 [<ffffffff81490e04>] __vfs_write+0x304/0x3e0 fs/read_write.c:491