lo: caps=(0x00000144401d7c69, 0x00000144401d7c69) len=65547 data_len=0 gso_size=65471 gso_type=1 ip_summed=3
------------[ cut here ]------------
WARNING: CPU: 1 PID: 336 at net/core/dev.c:2613 skb_warn_bad_offload.cold+0x1d1/0x44d net/core/dev.c:2613
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 336 Comm: syz-executor.4 Not tainted 4.14.184-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+0x1b2/0x283 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:964
RIP: 0010:skb_warn_bad_offload.cold+0x1d1/0x44d net/core/dev.c:2613
RSP: 0018:ffff88805c35edf8 EFLAGS: 00010286
RAX: 000000000000006c RBX: ffff888058e2a328 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff81499420 RDI: ffffed100b86bdb5
RBP: ffff88805e054ad0 R08: 000000000000006c R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805e054a00
R13: 000000000000ffbf R14: 0000000000000000 R15: 000000000001000b
 skb_checksum_help+0x650/0x7f0 net/core/dev.c:2634
 checksum_tg+0x52/0x65 net/netfilter/xt_CHECKSUM.c:29
 ipt_do_table+0xaa8/0x1700 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:405
 dst_output include/net/dst.h:462 [inline]
 ip_local_out+0x93/0x170 net/ipv4/ip_output.c:124
 ip_queue_xmit+0x7ca/0x1a70 net/ipv4/ip_output.c:504
 __tcp_transmit_skb+0x1831/0x2dc0 net/ipv4/tcp_output.c:1131
 tcp_transmit_skb net/ipv4/tcp_output.c:1147 [inline]
 __tcp_retransmit_skb+0x6cd/0x1c50 net/ipv4/tcp_output.c:2938
 tcp_retransmit_skb+0x28/0x220 net/ipv4/tcp_output.c:2952
 tcp_xmit_retransmit_queue.part.0+0x145/0x6f0 net/ipv4/tcp_output.c:3045
 tcp_xmit_retransmit_queue+0x4d/0x60 net/ipv4/tcp_output.c:2992
 tcp_xmit_recovery.part.0+0x1e/0x100 net/ipv4/tcp_input.c:3577
 tcp_xmit_recovery net/ipv4/tcp_input.c:3707 [inline]
 tcp_ack+0x2329/0x4170 net/ipv4/tcp_input.c:3706
 tcp_rcv_established+0x47f/0x15e0 net/ipv4/tcp_input.c:5559
 tcp_v4_do_rcv+0x56c/0x800 net/ipv4/tcp_ipv4.c:1467
 sk_backlog_rcv include/net/sock.h:917 [inline]
 __release_sock+0x12a/0x350 net/core/sock.c:2267
 release_sock+0x54/0x1b0 net/core/sock.c:2782
 sk_wait_data+0x139/0x3d0 net/core/sock.c:2309
 tcp_recvmsg+0xfbb/0x1cf0 net/ipv4/tcp.c:1923
 inet_recvmsg+0xef/0x4c0 net/ipv4/af_inet.c:793
 sock_recvmsg_nosec net/socket.c:819 [inline]
 sock_recvmsg net/socket.c:826 [inline]
 sock_recvmsg+0xc0/0x100 net/socket.c:822
 ___sys_recvmsg+0x21f/0x4d0 net/socket.c:2221
 __sys_recvmsg+0xa0/0x120 net/socket.c:2266
 SYSC_recvmsg net/socket.c:2278 [inline]
 SyS_recvmsg+0x27/0x40 net/socket.c:2273
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca69
RSP: 002b:00007fc9a4b20c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00000000004fbf80 RCX: 000000000045ca69
RDX: 0000000000000100 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008ba R14: 00000000004cb97a R15: 00007fc9a4b216d4
Kernel Offset: disabled
Rebooting in 86400 seconds..