------------[ cut here ]------------
WARNING: CPU: 1 PID: 3329 at net/core/dev.c:2466 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461
lo: caps=(0x000000a2803b7c69, 0x0000000000000000) len=2105 data_len=2043 gso_size=1992 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3329 Comm: syzkaller205672 Not tainted 4.9.73-gf3f3457 #11
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c8766e68 ffffffff81d922b9 ffffffff83a46d00 ffff8801c8766f40
 ffffffff83ee1900 ffffffff82f3226f 0000000000000009 ffff8801c8766f30
 ffffffff8142d741 0000000041b58ab3 ffffffff84189000 ffffffff8142d585
Call Trace:
 [<ffffffff81d922b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d922b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142d741>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8112f404>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8112f4e4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff82f3226f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461
 [<ffffffff82f45e0b>] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2767
 [<ffffffff82f46cae>] skb_gso_segment include/linux/netdevice.h:4000 [inline]
 [<ffffffff82f46cae>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:3003
 [<ffffffff82f488b7>] __dev_queue_xmit+0xa17/0x1e60 net/core/dev.c:3417
 [<ffffffff82f49d17>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3458
 [<ffffffff82f69a09>] neigh_resolve_output+0x469/0x770 net/core/neighbour.c:1308
 [<ffffffff8341a090>] dst_neigh_output include/net/dst.h:470 [inline]
 [<ffffffff8341a090>] ip6_finish_output2+0x930/0x1d20 net/ipv6/ip6_output.c:119
 [<ffffffff83423556>] ip6_finish_output+0x2e6/0x750 net/ipv6/ip6_output.c:145
 [<ffffffff83423bb3>] NF_HOOK_COND include/linux/netfilter.h:246 [inline]
 [<ffffffff83423bb3>] ip6_output+0x1f3/0x6a0 net/ipv6/ip6_output.c:162
 [<ffffffff8353db85>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff8353db85>] ip6_local_out+0x95/0x170 net/ipv6/output_core.c:176
 [<ffffffff83425c91>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1731
 [<ffffffff834869f1>] udp_v6_send_skb+0x301/0xeb0 net/ipv6/udp.c:974
 [<ffffffff8348797f>] udp_v6_push_pending_frames+0x22f/0x340 net/ipv6/udp.c:1007
 [<ffffffff8348c7a8>] udpv6_sendmsg+0x1f38/0x2540 net/ipv6/udp.c:1273
 [<ffffffff832eda3c>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:770
 [<ffffffff82ed4baa>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed4baa>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed67a1>] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1969
 [<ffffffff82ed87d6>] __sys_sendmsg+0xd6/0x190 net/socket.c:2003
 [<ffffffff82fdae0a>] C_SYSC_sendmsg net/compat.c:734 [inline]
 [<ffffffff82fdae0a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:732
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838b0be1>] entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..