: caps=(0x0000000000000000, 0x00000144401d7c69) len=248 data_len=184 gso_size=92 gso_type=1 ip_summed=3
------------[ cut here ]------------
WARNING: CPU: 0 PID: 29 at net/core/dev.c:2609 skb_warn_bad_offload.cold+0x1d1/0x44d net/core/dev.c:2609
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 29 Comm: kworker/u4:2 Not tainted 4.14.193-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:skb_warn_bad_offload.cold+0x1d1/0x44d net/core/dev.c:2609
RSP: 0018:ffff8880aea06f30 EFLAGS: 00010282
RAX: 0000000000000067 RBX: ffff888050a64da8 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff86ac0dc0 RDI: ffffed1015d40ddc
RBP: ffffffff8738f540 R08: 0000000000000067 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8738d9c0
R13: 000000000000005c R14: 00000000000000b8 R15: 00000000000000f8
 skb_checksum_help+0x627/0x7d0 net/core/dev.c:2630
 checksum_tg+0x52/0x65 net/netfilter/xt_CHECKSUM.c:29
 ipt_do_table+0xa9a/0x16f0 net/ipv4/netfilter/ip_tables.c:353
 ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:64 [inline]
 iptable_mangle_hook+0x2d5/0x560 net/ipv4/netfilter/iptable_mangle.c:89
 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline]
 nf_hook_slow+0xb0/0x1a0 net/netfilter/core.c:467
 nf_hook include/linux/netfilter.h:205 [inline]
 __ip_local_out+0x398/0x730 net/ipv4/ip_output.c:113
 ip_local_out+0x25/0x170 net/ipv4/ip_output.c:122
 ip_queue_xmit+0x7d3/0x1a80 net/ipv4/ip_output.c:504
 __tcp_transmit_skb+0x17e2/0x2cb0 net/ipv4/tcp_output.c:1133
 tcp_transmit_skb net/ipv4/tcp_output.c:1149 [inline]
 __tcp_retransmit_skb+0x6a8/0x1bc0 net/ipv4/tcp_output.c:2943
 tcp_retransmit_skb+0x28/0x220 net/ipv4/tcp_output.c:2957
 tcp_xmit_retransmit_queue.part.0+0x145/0x6f0 net/ipv4/tcp_output.c:3050
 tcp_xmit_retransmit_queue+0x4d/0x60 net/ipv4/tcp_output.c:2997
 tcp_xmit_recovery net/ipv4/tcp_input.c:3578 [inline]
 tcp_xmit_recovery net/ipv4/tcp_input.c:3564 [inline]
 tcp_ack+0x2319/0x43c0 net/ipv4/tcp_input.c:3707
 tcp_rcv_established+0x4fe/0x17a0 net/ipv4/tcp_input.c:5568
 tcp_v4_do_rcv+0x541/0x7d0 net/ipv4/tcp_ipv4.c:1476
 tcp_v4_rcv+0x275c/0x3560 net/ipv4/tcp_ipv4.c:1750
 ip_local_deliver_finish+0x3f2/0xab0 net/ipv4/ip_input.c:216
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip_local_deliver+0x167/0x460 net/ipv4/ip_input.c:257
 dst_input include/net/dst.h:476 [inline]
 ip_rcv_finish+0x6e3/0x19f0 net/ipv4/ip_input.c:396
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip_rcv+0x8a7/0xf01 net/ipv4/ip_input.c:493
 __netif_receive_skb_core+0x15ee/0x2a30 net/core/dev.c:4474
 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512
 process_backlog+0x210/0x6f0 net/core/dev.c:5194
 napi_poll net/core/dev.c:5595 [inline]
 net_rx_action+0x466/0xfd0 net/core/dev.c:5661
 __do_softirq+0x254/0xa1d kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x193/0x240 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:200
RSP: 0018:ffff8880a9aefd18 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2d23 RBX: ffff8880a9adc080 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880a9adc904
RBP: ffff8880aea2b580 R08: ffffffff8a09d908 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aea2b580
R13: ffff8880a81ee400 R14: 0000000000000000 R15: ffff8880aea2bed0
 finish_lock_switch kernel/sched/sched.h:1352 [inline]
 finish_task_switch+0x178/0x610 kernel/sched/core.c:2675
 context_switch kernel/sched/core.c:2811 [inline]
 __schedule+0x893/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 worker_thread+0x14b/0xff0 kernel/workqueue.c:2271
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..