IPVS: Creating netns size=2552 id=4
IPVS: Creating netns size=2552 id=5
IPVS: Creating netns size=2552 id=6
IPVS: Creating netns size=2552 id=7
IPVS: Creating netns size=2552 id=8
BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor4/6556
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 6556 Comm: syz-executor4 Not tainted 4.4.120-gd63fdf6 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 087e448872f656e8 ffff8801c5a275b8 ffffffff81d0408d
 0000000000000001 ffffffff839fe5a0 ffffffff83cefc20 ffff8800b3133000
 0000000000000003 ffff8801c5a275f8 ffffffff81d63fe4 ffffffff810002b8
Call Trace:
 [<ffffffff81d0408d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0408d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d63fe4>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff810002b8>] ? 0xffffffff810002b8
 [<ffffffff81d6404c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff8312b439>] tcp_try_coalesce+0x249/0x4d0 net/ipv4/tcp_input.c:4278
 [<ffffffff831335b7>] tcp_queue_rcv+0x127/0x720 net/ipv4/tcp_input.c:4485
 [<ffffffff8314ae8b>] tcp_send_rcvq+0x39b/0x450 net/ipv4/tcp_input.c:4531
 [<ffffffff831220ef>] tcp_sendmsg+0x1e8f/0x2b10 net/ipv4/tcp.c:1134
 [<ffffffff831d7d4c>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:755
 [<ffffffff82deba6a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82deba6a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debcd6>] sock_write_iter+0x226/0x3b0 net/socket.c:834
 [<ffffffff8151e0b8>] do_iter_readv_writev+0x138/0x1e0 fs/read_write.c:664
 [<ffffffff81520094>] compat_do_readv_writev+0x2d4/0x6e0 fs/read_write.c:982
 [<ffffffff815207ac>] compat_writev+0xdc/0x150 fs/read_write.c:1090
 [<ffffffff81522b28>] C_SYSC_writev fs/read_write.c:1110 [inline]
 [<ffffffff81522b28>] compat_SyS_writev+0xd8/0x1b0 fs/read_write.c:1099
 [<ffffffff81006d91>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d91>] do_fast_syscall_32+0x321/0x8a0 arch/x86/entry/common.c:459
 [<ffffffff837752ea>] sysenter_flags_fixed+0xd/0x17