------------[ cut here ]------------
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
kernel BUG at net/core/skbuff.c:2192!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3835 Comm: syz-executor5 Not tainted 4.4.137-ga2e2217 #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801bb511800 task.stack: ffff8801bb538000
RIP: 0010:[<ffffffff82f3c5ca>]  [<ffffffff82f3c5ca>] skb_copy_and_csum_bits+0x69a/0x7d0 net/core/skbuff.c:2192
RSP: 0018:ffff8801db207260  EFLAGS: 00010206
RAX: ffff8801bb511800 RBX: 000000009008324d RCX: 1ffff1003a4d7c49
RDX: 0000000000000100 RSI: ffffffff82f3c5ca RDI: ffff8801d26be248
RBP: ffff8801db2072e0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003c R11: ffff8800b948475f R12: 0000000000000000
R13: 0000000000000224 R14: 0000000000000000 R15: ffff8801d26be240
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008ee8900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000811c854 CR3: 00000001bb4e3000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81290a8c ffff8801d421a5c4 ffffffff838c5dac ffffffff8113f8ad
 ffff8801d421a5c8 ffff8800b94844e8 9008324d0000003c 000001e80000003c
 0000003c0000003c ffff8801d421a500 0000000000000000 ffff88009247acc0
Call Trace:
 <IRQ> 
 [<ffffffff832e4baf>] icmp_glue_bits+0x7f/0x1e0 net/ipv4/icmp.c:344
 [<ffffffff83214311>] __ip_append_data.isra.45+0x1e71/0x2a70 net/ipv4/ip_output.c:1043
 [<ffffffff83214ff4>] ip_append_data.part.47+0xe4/0x150 net/ipv4/ip_output.c:1193
 [<ffffffff8321d548>] ip_append_data+0x68/0x80 net/ipv4/ip_output.c:1182
 [<ffffffff832e47be>] icmp_push_reply+0x19e/0x510 net/ipv4/icmp.c:362
 [<ffffffff832e915a>] icmp_send+0xaca/0x13d0 net/ipv4/icmp.c:727
 [<ffffffff83218fca>] ip_fragment.constprop.51+0x1aa/0x200 net/ipv4/ip_output.c:509
 [<ffffffff832194aa>] ip_finish_output+0x48a/0xc00 net/ipv4/ip_output.c:286
 [<ffffffff8321d239>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff8321d239>] ip_output+0x219/0x4c0 net/ipv4/ip_output.c:362
 [<ffffffff8321a0fb>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff8321a0fb>] ip_local_out+0x9b/0x180 net/ipv4/ip_output.c:119
 [<ffffffff8321b43e>] ip_queue_xmit+0x88e/0x1af0 net/ipv4/ip_output.c:461
 [<ffffffff83280ff2>] tcp_transmit_skb+0x1642/0x2bf0 net/ipv4/tcp_output.c:1029
 [<ffffffff8328beb8>] __tcp_retransmit_skb+0x608/0x1890 net/ipv4/tcp_output.c:2649
 [<ffffffff8328d833>] tcp_retransmit_skb+0x23/0x2c0 net/ipv4/tcp_output.c:2666
 [<ffffffff8329311d>] tcp_retransmit_timer+0x7bd/0x1ed0 net/ipv4/tcp_timer.c:461
 [<ffffffff83294a21>] tcp_write_timer_handler+0x1f1/0x6f0 net/ipv4/tcp_timer.c:543
 [<ffffffff83294fda>] tcp_write_timer+0xba/0xd0 net/ipv4/tcp_timer.c:561
 [<ffffffff81290a8c>] call_timer_fn+0x18c/0x870 kernel/time/timer.c:1185
 [<ffffffff812917b2>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff812917b2>] run_timer_softirq+0x642/0xb90 kernel/time/timer.c:1444
 [<ffffffff838c5dac>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff8113f8ad>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113f8ad>] irq_exit+0x10d/0x140 kernel/softirq.c:391
 [<ffffffff838c5511>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff838c5511>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff838c4450>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff8147796d>] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline]
 [<ffffffff8147796d>] pcpu_alloc+0x2ed/0xb00 mm/percpu.c:989
 [<ffffffff814781d4>] __alloc_percpu+0x24/0x30 mm/percpu.c:1081
 [<ffffffff83160064>] xt_percpu_counter_alloc+0x134/0x1b0 net/netfilter/x_tables.c:1656
 [<ffffffff8351ae16>] find_check_entry.isra.7+0xb6/0x9a0 net/ipv6/netfilter/ip6_tables.c:675
 [<ffffffff8351f9c9>] translate_table+0xc69/0x1750 net/ipv6/netfilter/ip6_tables.c:888
 [<ffffffff83521adb>] translate_compat_table+0x142b/0x1870 net/ipv6/netfilter/ip6_tables.c:1644
 [<ffffffff83522189>] compat_do_replace.isra.15+0x269/0x3f0 net/ipv6/netfilter/ip6_tables.c:1700
 [<ffffffff835229d2>] compat_do_ip6t_set_ctl+0x102/0x140 net/ipv6/netfilter/ip6_tables.c:1731
 [<ffffffff830c6dcb>] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline]
 [<ffffffff830c6dcb>] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155
 [<ffffffff83483b5d>] compat_ipv6_setsockopt+0x15d/0x1d0 net/ipv6/ipv6_sockglue.c:940
 [<ffffffff8322fcf7>] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914
 [<ffffffff8324459d>] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2654
 [<ffffffff82f24ab4>] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2670
 [<ffffffff8300c49b>] C_SYSC_setsockopt net/compat.c:385 [inline]
 [<ffffffff8300c49b>] compat_SyS_setsockopt net/compat.c:368 [inline]
 [<ffffffff8300c49b>] C_SYSC_socketcall net/compat.c:836 [inline]
 [<ffffffff8300c49b>] compat_SyS_socketcall+0x61b/0xb60 net/compat.c:771
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c422a>] sysenter_flags_fixed+0xd/0x17
Code: 00 00 4d 8b 24 24 44 8b 6d d0 4d 85 e4 0f 85 1b ff ff ff 8b 5d b4 e8 f6 4e 41 fe 8b 45 bc 85 c0 0f 84 7f fe ff ff e8 e6 4e 41 fe <0f> 0b 8b 5d b4 e9 70 fe ff ff c7 45 b0 00 00 00 00 e9 8c fa ff 
RIP  [<ffffffff82f3c5ca>] skb_copy_and_csum_bits+0x69a/0x7d0 net/core/skbuff.c:2192
 RSP <ffff8801db207260>
---[ end trace eecaeb084fdf7d77 ]---