sit0: caps=(0x00000000401d7869, 0x00000000401d7869) len=2960 data_len=0 gso_size=65535 gso_type=16384 ip_summed=3
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7978 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: 7978 Comm: syz-fuzzer Not tainted 4.14.262-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+0x1b2/0x281 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:183
 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: 0000:ffff8880ba507148 EFLAGS: 00010286
RAX: 0000000000000071 RBX: ffff8880961a5528 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff878bbcc0 RDI: ffffed10174a0e1f
RBP: ffff888092018410 R08: 0000000000000071 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888092018340
R13: 000000000000ffff R14: 0000000000000000 R15: 0000000000000b90
 skb_checksum_help+0x627/0x7d0 net/core/dev.c:2630
 checksum_tg+0x52/0x70 net/netfilter/xt_CHECKSUM.c:29
 ip6t_do_table+0x9f1/0x1720 net/ipv6/netfilter/ip6_tables.c:375
 ip6table_mangle_hook+0xdd/0x6a0 net/ipv6/netfilter/ip6table_mangle.c:86
 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]
 ip6_output+0x392/0x660 net/ipv6/ip6_output.c:209
 dst_output include/net/dst.h:470 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ip6_xmit+0xcc6/0x1f00 net/ipv6/ip6_output.c:313
 sctp_v6_xmit+0x36e/0x590 net/sctp/ipv6.c:224
 sctp_packet_transmit+0x1c27/0x3000 net/sctp/output.c:637
 sctp_outq_flush_rtx net/sctp/outqueue.c:703 [inline]
 sctp_outq_flush+0x1286/0x30a0 net/sctp/outqueue.c:1002
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
 sctp_do_sm+0x6b4/0x4c70 net/sctp/sm_sideeffect.c:1150
 sctp_generate_heartbeat_event+0x273/0x440 net/sctp/sm_sideeffect.c:391
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280
 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319
 __run_timers kernel/time/timer.c:1637 [inline]
 run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650
 __do_softirq+0x24d/0x9ff 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:638 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0033:0x40d6ec
RSP: 002b:000000c01b0a2c50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 000000c00002e800 RBX: 0000000000000008 RCX: 00007f6e5becb108
RDX: 0000000000000028 RSI: 0000000000000028 RDI: 0000000000000000
RBP: 000000c01b0a2ce0 R08: 00007f6e32f4017d R09: 0000000000203009
R10: 0000000000000008 R11: 0000000000000074 R12: 00000000000000f4
R13: 0000000000000000 R14: 00000000008e0a83 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..