------------[ cut here ]------------ : caps=(0x0000000000000000, 0x00000144401d7c69) len=2552 data_len=2500 gso_size=500 gso_type=1 ip_summed=3 WARNING: CPU: 1 PID: 9638 at net/core/dev.c:2635 skb_warn_bad_offload+0x2c9/0x3d0 net/core/dev.c:2630 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9638 Comm: syz-executor1 Not tainted 4.16.0-rc2+ #241 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+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x58/0x80 arch/x86/entry/entry_64.S:957 RIP: 0010:skb_warn_bad_offload+0x2c9/0x3d0 net/core/dev.c:2630 RSP: 0018:ffff8801af7d6a00 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: 0000000000000000 RCX: ffffffff815abe7e RDX: 0000000000005519 RSI: ffffc90001c90000 RDI: 1ffff10035efacc5 RBP: ffff8801af7d6a58 R08: 1ffff10035efac87 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003 R13: ffffffff868403c0 R14: ffff8801b2e48da0 R15: 0000000000000001 skb_checksum_help+0x7c4/0xb60 net/core/dev.c:2651 checksum_tg+0x59/0x70 net/netfilter/xt_CHECKSUM.c:29 ipt_do_table+0xd05/0x19b0 net/ipv4/netfilter/ip_tables.c:348 ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:59 [inline] iptable_mangle_hook+0x219/0x4a0 net/ipv4/netfilter/iptable_mangle.c:84 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline] nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483 nf_hook include/linux/netfilter.h:243 [inline] __ip_local_out+0x4c1/0xa30 net/ipv4/ip_output.c:113 ip_local_out+0x2d/0x160 net/ipv4/ip_output.c:122 ip_queue_xmit+0x8c0/0x18e0 net/ipv4/ip_output.c:504 tcp_transmit_skb+0x1b12/0x3960 net/ipv4/tcp_output.c:1176 tcp_write_xmit+0x72e/0x5210 net/ipv4/tcp_output.c:2372 tcp_push_one+0xca/0x100 net/ipv4/tcp_output.c:2559 tcp_sendmsg_locked+0xaea/0x3960 net/ipv4/tcp.c:1379 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1436 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xca/0x110 net/socket.c:639 SYSC_sendto+0x361/0x5c0 net/socket.c:1748 SyS_sendto+0x40/0x50 net/socket.c:1716 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453de9 RSP: 002b:00007f6a5ca61c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f6a5ca626d4 RCX: 0000000000453de9 RDX: 000000000000a561 RSI: 0000000020769fff RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000004008004 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..