------------[ cut here ]------------
WARNING: CPU: 1 PID: 5287 at net/core/dev.c:2466 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461
lo: caps=(0x000000a2803b7c69, 0x0000000000000000) len=2102 data_len=2040 gso_size=1992 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 5287 Comm: syz-executor0 Not tainted 4.9.86-g00db063 #52
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c1ccef60 ffffffff81d956f9 ffffffff83a480c0 ffff8801c1ccf038
 ffffffff83ee3400 ffffffff82f3634f 0000000000000009 ffff8801c1ccf028
 ffffffff8142f531 0000000041b58ab3 ffffffff8418b470 ffffffff8142f375
Call Trace:
 [<ffffffff81d956f9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d956f9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142f531>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811311c4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff811312a4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff82f3634f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461
 [<ffffffff82f49f01>] __skb_gso_segment+0x541/0x680 net/core/dev.c:2767
 [<ffffffff82f4ad9e>] skb_gso_segment include/linux/netdevice.h:4000 [inline]
 [<ffffffff82f4ad9e>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:3003
 [<ffffffff82f4cabc>] __dev_queue_xmit+0xb2c/0x20a0 net/core/dev.c:3428
 [<ffffffff82f4e047>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3469
 [<ffffffff82f6dc89>] neigh_resolve_output+0x469/0x770 net/core/neighbour.c:1308
 [<ffffffff8341f930>] dst_neigh_output include/net/dst.h:470 [inline]
 [<ffffffff8341f930>] ip6_finish_output2+0x930/0x1d20 net/ipv6/ip6_output.c:119
 [<ffffffff83428f06>] ip6_finish_output+0x2e6/0x750 net/ipv6/ip6_output.c:145
 [<ffffffff83429563>] NF_HOOK_COND include/linux/netfilter.h:246 [inline]
 [<ffffffff83429563>] ip6_output+0x1f3/0x6a0 net/ipv6/ip6_output.c:162
 [<ffffffff83543865>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff83543865>] ip6_local_out+0x95/0x170 net/ipv6/output_core.c:176
 [<ffffffff8342b6d1>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1741
 [<ffffffff8348c331>] udp_v6_send_skb+0x301/0xeb0 net/ipv6/udp.c:974
 [<ffffffff8348d2bf>] udp_v6_push_pending_frames+0x22f/0x340 net/ipv6/udp.c:1007
 [<ffffffff834920e8>] udpv6_sendmsg+0x1f38/0x2540 net/ipv6/udp.c:1273
 [<ffffffff832f29bc>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:770
 [<ffffffff82ed8baa>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed8baa>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed9b08>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82edc010>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5613>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..