------------[ cut here ]------------
WARNING: CPU: 1 PID: 28638 at net/core/dev.c:2473 skb_warn_bad_offload+0x2b0/0x390 net/core/dev.c:2473()
sit0: caps=(0x00000000001b7869, 0x00000000001b7869) len=65310 data_len=65262 gso_size=1432 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 28638 Comm: syz-executor.3 Not tainted 4.4.174+ #4
 0000000000000000 c05bffd7128d9751 ffff8801d169f108 ffffffff81aad1a1
 ffff8801d169f258 ffffffff82835ee0 ffffffff82a54880 00000000000009a9
 ffffffff8222e030 ffff8801d169f1e8 ffffffff813a48c2 0000000041b58ab3
Call Trace:
 [<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813a48c2>] panic+0x1b9/0x37b kernel/panic.c:112
 [<ffffffff813a4ab9>] warn_slowpath_common kernel/panic.c:455 [inline]
 [<ffffffff813a4ab9>] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435
 [<ffffffff810d394f>] warn_slowpath_fmt+0xbf/0x100 kernel/panic.c:471
 [<ffffffff8222e030>] skb_warn_bad_offload+0x2b0/0x390 net/core/dev.c:2473
 [<ffffffff822434f3>] __skb_gso_segment+0x413/0x4c0 net/core/dev.c:2631
 [<ffffffff822441af>] skb_gso_segment include/linux/netdevice.h:3712 [inline]
 [<ffffffff822441af>] validate_xmit_skb.isra.0.part.0+0x49f/0xa90 net/core/dev.c:2839
 [<ffffffff82247392>] validate_xmit_skb net/core/dev.c:2968 [inline]
 [<ffffffff82247392>] __dev_queue_xmit+0x1612/0x1bb0 net/core/dev.c:3221
 [<ffffffff82247948>] dev_queue_xmit+0x18/0x20 net/core/dev.c:3263
 [<ffffffff8225c136>] neigh_direct_output+0x16/0x20 net/core/neighbour.c:1369
 [<ffffffff8259f877>] dst_neigh_output include/net/dst.h:461 [inline]
 [<ffffffff8259f877>] ip6_finish_output2+0x9c7/0x1dc0 net/ipv6/ip6_output.c:113
 [<ffffffff825b0203>] ip6_finish_output+0x2f3/0x750 net/ipv6/ip6_output.c:131
 [<ffffffff825b0814>] NF_HOOK_COND include/linux/netfilter.h:240 [inline]
 [<ffffffff825b0814>] ip6_output+0x1b4/0x520 net/ipv6/ip6_output.c:145
 [<ffffffff826bf66c>] dst_output include/net/dst.h:498 [inline]
 [<ffffffff826bf66c>] ip6_local_out+0x9c/0x180 net/ipv6/output_core.c:169
 [<ffffffff825b28c2>] ip6_send_skb+0xa2/0x340 net/ipv6/ip6_output.c:1725
 [<ffffffff82611a3c>] udp_v6_send_skb+0x85c/0xe90 net/ipv6/udp.c:1066
 [<ffffffff826142ed>] udpv6_sendmsg+0x1e3d/0x24f0 net/ipv6/udp.c:1330
 [<ffffffff824a8b42>] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755
 [<ffffffff821d838e>] sock_sendmsg_nosec net/socket.c:638 [inline]
 [<ffffffff821d838e>] sock_sendmsg+0xbe/0x110 net/socket.c:648
 [<ffffffff821d8615>] sock_write_iter+0x235/0x3d0 net/socket.c:847
 [<ffffffff81496ae8>] new_sync_write fs/read_write.c:480 [inline]
 [<ffffffff81496ae8>] __vfs_write+0x2e8/0x3d0 fs/read_write.c:493
 [<ffffffff81498612>] vfs_write+0x182/0x4e0 fs/read_write.c:540
 [<ffffffff8149ac4c>] SYSC_write fs/read_write.c:587 [inline]
 [<ffffffff8149ac4c>] SyS_write+0xdc/0x1c0 fs/read_write.c:579
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Kernel Offset: disabled
Rebooting in 86400 seconds..