lo: caps=(0x00000144401d7c69, 0x00000144401d7c69) len=260 data_len=0 gso_size=104 gso_type=1 ip_summed=3
------------[ cut here ]------------
WARNING: CPU: 1 PID: 17 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: 1 PID: 17 Comm: ksoftirqd/1 Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 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:ffff8880b54b6e00 EFLAGS: 00010282
RAX: 0000000000000068 RBX: ffff8880af361828 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bbbc0 RDI: ffffed1016a96db6
RBP: ffff88804a4a6610 R08: 0000000000000068 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804a4a6540
R13: 0000000000000068 R14: 0000000000000000 R15: 0000000000000104
 skb_checksum_help+0x627/0x7d0 net/core/dev.c:2630
 checksum_tg+0x52/0x70 net/netfilter/xt_CHECKSUM.c:29
 ipt_do_table+0xa9a/0x16f0 net/ipv4/netfilter/ip_tables.c:353
 iptable_mangle_hook+0x9c/0x560 net/ipv4/netfilter/iptable_mangle.c:90
 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]
 NF_HOOK_COND include/linux/netfilter.h:238 [inline]
 ip_output+0x2e7/0x510 net/ipv4/ip_output.c:406
 dst_output include/net/dst.h:470 [inline]
 ip_local_out+0x93/0x170 net/ipv4/ip_output.c:125
 ip_queue_xmit+0x7d3/0x1a80 net/ipv4/ip_output.c:505
 __tcp_transmit_skb+0x17e2/0x2cb0 net/ipv4/tcp_output.c:1133
 tcp_transmit_skb net/ipv4/tcp_output.c:1149 [inline]
 __tcp_retransmit_skb+0x6a8/0x1bd0 net/ipv4/tcp_output.c:2946
 tcp_retransmit_skb+0x28/0x320 net/ipv4/tcp_output.c:2960
 tcp_xmit_retransmit_queue.part.0+0x145/0x770 net/ipv4/tcp_output.c:3053
 tcp_xmit_retransmit_queue+0x4d/0x60 net/ipv4/tcp_output.c:3000
 tcp_xmit_recovery net/ipv4/tcp_input.c:3579 [inline]
 tcp_xmit_recovery net/ipv4/tcp_input.c:3565 [inline]
 tcp_ack+0x233e/0x4580 net/ipv4/tcp_input.c:3709
 tcp_rcv_established+0x4fe/0x1810 net/ipv4/tcp_input.c:5572
 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+0x8a7/0xf10 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+0x218/0x6f0 net/core/dev.c:5194
 napi_poll net/core/dev.c:5596 [inline]
 net_rx_action+0x466/0xfd0 net/core/dev.c:5662
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288
 run_ksoftirqd+0x50/0x1a0 kernel/softirq.c:670
 smpboot_thread_fn+0x5c1/0x920 kernel/smpboot.c:164
 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..