: caps=(0x0000000000000000, 0x00000144401d7c69) len=2720 data_len=2680 gso_size=536 gso_type=1 ip_summed=3
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8694 at net/core/dev.c:2613 skb_warn_bad_offload.cold+0x1ce/0x448 net/core/dev.c:2613
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8694 Comm: syz-executor.4 Not tainted 4.14.176-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+0x13e/0x194 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 report_bug+0x20a/0x248 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:963
RIP: 0010:skb_warn_bad_offload.cold+0x1ce/0x448 net/core/dev.c:2613
RSP: 0018:ffff888087037040 EFLAGS: 00010282
RAX: 000000000000006a RBX: ffff8880a58bcda8 RCX: 0000000000000000
RDX: 00000000000201d9 RSI: ffffffff81491390 RDI: ffffed1010e06dfe
RBP: ffffffff87387b20 R08: 000000000000006a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87385d60
R13: 0000000000000218 R14: 0000000000000a78 R15: 0000000000000aa0
 skb_checksum_help+0x5f3/0x830 net/core/dev.c:2634
 checksum_tg+0x52/0x65 net/netfilter/xt_CHECKSUM.c:29
 ipt_do_table+0xaaf/0x16d0 net/ipv4/netfilter/ip_tables.c:353
 ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:64 [inline]
 iptable_mangle_hook+0x2d3/0x560 net/ipv4/netfilter/iptable_mangle.c:89
 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline]
 nf_hook_slow+0xa5/0x1a0 net/netfilter/core.c:467
 nf_hook include/linux/netfilter.h:205 [inline]
 __ip_local_out+0x358/0x730 net/ipv4/ip_output.c:113
 ip_local_out+0x25/0x170 net/ipv4/ip_output.c:122
 ip_queue_xmit+0x7b2/0x1b20 net/ipv4/ip_output.c:504
 __tcp_transmit_skb+0x1654/0x2dd0 net/ipv4/tcp_output.c:1131
 tcp_transmit_skb net/ipv4/tcp_output.c:1147 [inline]
 tcp_write_xmit+0x56a/0x4a60 net/ipv4/tcp_output.c:2391
 __tcp_push_pending_frames+0x9c/0x240 net/ipv4/tcp_output.c:2572
 tcp_push+0x3fd/0x5f0 net/ipv4/tcp.c:715
 do_tcp_sendpages+0x1229/0x1750 net/ipv4/tcp.c:1048
 tcp_sendpage_locked net/ipv4/tcp.c:1076 [inline]
 tcp_sendpage_locked+0x81/0x130 net/ipv4/tcp.c:1067
 tcp_sendpage+0x3a/0x60 net/ipv4/tcp.c:1086
 inet_sendpage+0x155/0x590 net/ipv4/af_inet.c:779
 kernel_sendpage+0x82/0xd0 net/socket.c:3407
 sock_sendpage+0x84/0xa0 net/socket.c:871
 pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x332/0x740 fs/splice.c:626
 splice_from_pipe+0xc6/0x120 fs/splice.c:661
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1018
 splice_direct_to_actor+0x27e/0x730 fs/splice.c:973
 do_splice_direct+0x164/0x210 fs/splice.c:1061
 do_sendfile+0x469/0xaf0 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c889
RSP: 002b:00007fda8c0cec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fda8c0cf6d4 RCX: 000000000045c889
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000edc0 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008d6 R14: 00000000004cb7ee R15: 000000000076bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..