------------[ cut here ]------------
WARNING: CPU: 0 PID: 31858 at net/core/dev.c:2462 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
sit1: caps=(0x00000000803b5869, 0x0000000000000000) len=4190 data_len=4142 gso_size=1432 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

device lo entered promiscuous mode
CPU: 0 PID: 31858 Comm: syz-executor2 Not tainted 4.9.49-g0268f76 #46
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cdd77088 ffffffff81d92fc9 ffffffff83a46b40 ffff8801cdd77160
 ffffffff83edf900 ffffffff82f2d25f 0000000000000009 ffff8801cdd77150
 ffffffff8142e6d1 0000000041b58ab3 ffffffff84184980 ffffffff8142e515
Call Trace:
 [<ffffffff81d92fc9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d92fc9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e6d1>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131ed4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff81131fb4>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff82f2d25f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
 [<ffffffff82f40dcb>] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2763
 [<ffffffff82f41c6e>] skb_gso_segment include/linux/netdevice.h:3995 [inline]
 [<ffffffff82f41c6e>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:2999
 [<ffffffff82f43877>] __dev_queue_xmit+0xa17/0x1e60 net/core/dev.c:3413
 [<ffffffff82f44cd7>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3454
 [<ffffffff82f59895>] neigh_direct_output+0x15/0x20 net/core/neighbour.c:1348
 [<ffffffff83415c50>] dst_neigh_output include/net/dst.h:470 [inline]
 [<ffffffff83415c50>] ip6_finish_output2+0x930/0x1d20 net/ipv6/ip6_output.c:119
 [<ffffffff8341f116>] ip6_finish_output+0x2e6/0x750 net/ipv6/ip6_output.c:145
 [<ffffffff8341f773>] NF_HOOK_COND include/linux/netfilter.h:246 [inline]
 [<ffffffff8341f773>] ip6_output+0x1f3/0x6a0 net/ipv6/ip6_output.c:162
 [<ffffffff83538465>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff83538465>] ip6_local_out+0x95/0x170 net/ipv6/output_core.c:178
 [<ffffffff83421851>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1731
 [<ffffffff83481db1>] udp_v6_send_skb+0x301/0xeb0 net/ipv6/udp.c:973
 [<ffffffff83482d3f>] udp_v6_push_pending_frames+0x22f/0x340 net/ipv6/udp.c:1006
 [<ffffffff83484bca>] udpv6_sendmsg+0x1d7a/0x2390 net/ipv6/udp.c:1272
 [<ffffffff832e9cdc>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753
 [<ffffffff82ecfb9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ecfb9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed0af8>] SYSC_sendto+0x2c8/0x340 net/socket.c:1670
 [<ffffffff82ed2fa0>] SyS_sendto+0x40/0x50 net/socket.c:1638
 [<ffffffff838aad85>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..