BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.5/22336
caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
CPU: 0 PID: 22336 Comm: syz-executor.5 Not tainted 4.4.174+ #17
 0000000000000000 98d91a315ac2ca41 ffff88008005f758 ffffffff81aad1a1
 ffff88008dae4740 0000000000000000 ffffffff82a861e0 ffffffff8292c040
 0000000000000002 ffff88008005f798 ffffffff81b0ad83 1ffff1001000be00
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81b0ad83>] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46
 [<ffffffff81b0aded>] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
 [<ffffffff82412741>] tcp_prune_queue net/ipv4/tcp_input.c:4978 [inline]
 [<ffffffff82412741>] tcp_try_rmem_schedule+0x1a1/0x1280 net/ipv4/tcp_input.c:4386
 [<ffffffff82424747>] tcp_send_rcvq+0x1d7/0x4a0 net/ipv4/tcp_input.c:4574
 [<ffffffff823fd062>] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff822acdda>] C_SYSC_sendmsg net/compat.c:725 [inline]
 [<ffffffff822acdda>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.5/22336
caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
CPU: 0 PID: 22336 Comm: syz-executor.5 Not tainted 4.4.174+ #17
 0000000000000000 98d91a315ac2ca41 ffff88008005f5c0 ffffffff81aad1a1
 ffff88008dae4740 0000000000000000 ffffffff82a861e0 ffffffff8292c040
 0000000000000002 ffff88008005f600 ffffffff81b0ad83 ffff8801cf2e3340
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81b0ad83>] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46
 [<ffffffff81b0aded>] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
 [<ffffffff8240f589>] tcp_collapse_one+0x119/0x1e0 net/ipv4/tcp_input.c:4736
 [<ffffffff8241204f>] tcp_collapse+0x84f/0xda0 net/ipv4/tcp_input.c:4849
 [<ffffffff82412c5a>] tcp_prune_queue net/ipv4/tcp_input.c:4990 [inline]
 [<ffffffff82412c5a>] tcp_try_rmem_schedule+0x6ba/0x1280 net/ipv4/tcp_input.c:4386
 [<ffffffff82424747>] tcp_send_rcvq+0x1d7/0x4a0 net/ipv4/tcp_input.c:4574
 [<ffffffff823fd062>] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff822acdda>] C_SYSC_sendmsg net/compat.c:725 [inline]
 [<ffffffff822acdda>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
BUG: using __this_cpu_add() in preemptible [00000000] code: syz-executor.5/22336
caller is __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
CPU: 0 PID: 22336 Comm: syz-executor.5 Not tainted 4.4.174+ #17
 0000000000000000 98d91a315ac2ca41 ffff88008005f758 ffffffff81aad1a1
 ffff88008dae4740 0000000000000000 ffffffff82a861e0 ffffffff8292c040
 0000000000000002 ffff88008005f798 ffffffff81b0ad83 1ffff1001000be00
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81b0ad83>] check_preemption_disabled+0x1d3/0x200 lib/smp_processor_id.c:46
 [<ffffffff81b0aded>] __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:62
 [<ffffffff824134d5>] tcp_prune_queue net/ipv4/tcp_input.c:5011 [inline]
 [<ffffffff824134d5>] tcp_try_rmem_schedule+0xf35/0x1280 net/ipv4/tcp_input.c:4386
 [<ffffffff82424747>] tcp_send_rcvq+0x1d7/0x4a0 net/ipv4/tcp_input.c:4574
 [<ffffffff823fd062>] tcp_sendmsg+0x2332/0x2ab0 net/ipv4/tcp.c:1134
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821da269>] ___sys_sendmsg+0x769/0x890 net/socket.c:1975
 [<ffffffff821dd0c5>] __sys_sendmsg+0xc5/0x160 net/socket.c:2009
 [<ffffffff822acdda>] C_SYSC_sendmsg net/compat.c:725 [inline]
 [<ffffffff822acdda>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:723
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
loop_set_status: loop2 () has still dirty pages (nrpages=17)
loop_set_status: loop2 () has still dirty pages (nrpages=1)
loop_set_status: loop2 () has still dirty pages (nrpages=1)
loop_set_status: loop2 () has still dirty pages (nrpages=257)
TCP: request_sock_TCP: Possible SYN flooding on port 20000. Dropping request.  Check SNMP counters.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 22593 at mm/page_alloc.c:3069 __alloc_pages_slowpath mm/page_alloc.c:3069 [inline]()
WARNING: CPU: 0 PID: 22593 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0 mm/page_alloc.c:3313()