device lo entered promiscuous mode
------------[ cut here ]------------
WARNING: CPU: 0 PID: 21615 at net/core/dev.c:2462 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
lo: caps=(0x000000a2803b7c69, 0x0000000000000000) len=4159 data_len=4097 gso_size=1992 gso_type=2 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 21615 Comm: syz-executor1 Not tainted 4.9.52-g3217ccc #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d0c4ef70 ffffffff81d93149 ffffffff83a46b40 ffff8801d0c4f048
 ffffffff83edfd00[  118.629729] netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
 ffffffff82f2e24f 0000000000000009 ffff8801d0c4f038[  118.643711] netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'.
 ffffffff8142e771 0000000041b58ab3 ffffffff841856b8 ffffffff8142e5b5
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e771>] 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
 [<ffffffff82f2e24f>] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2457
 [<ffffffff82f41dbb>] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2763
 [<ffffffff82f42c5e>] skb_gso_segment include/linux/netdevice.h:3997 [inline]
 [<ffffffff82f42c5e>] validate_xmit_skb+0x44e/0x980 net/core/dev.c:2999
 [<ffffffff82f44867>] __dev_queue_xmit+0xa17/0x1e60 net/core/dev.c:3413
 [<ffffffff82f45cc7>] dev_queue_xmit+0x17/0x20 net/core/dev.c:3454
 [<ffffffff83417ca9>] neigh_hh_output include/net/neighbour.h:468 [inline]
 [<ffffffff83417ca9>] dst_neigh_output include/net/dst.h:468 [inline]
 [<ffffffff83417ca9>] ip6_finish_output2+0x1159/0x1d20 net/ipv6/ip6_output.c:119
 [<ffffffff83420946>] ip6_finish_output+0x2e6/0x750 net/ipv6/ip6_output.c:145
 [<ffffffff83420fa3>] NF_HOOK_COND include/linux/netfilter.h:246 [inline]
 [<ffffffff83420fa3>] ip6_output+0x1f3/0x6a0 net/ipv6/ip6_output.c:162
 [<ffffffff8353ad45>] dst_output include/net/dst.h:507 [inline]
 [<ffffffff8353ad45>] ip6_local_out+0x95/0x170 net/ipv6/output_core.c:176
 [<ffffffff83423081>] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1731
 [<ffffffff83483c01>] udp_v6_send_skb+0x301/0xeb0 net/ipv6/udp.c:973
 [<ffffffff83484b8f>] udp_v6_push_pending_frames+0x22f/0x340 net/ipv6/udp.c:1006
 [<ffffffff834899b8>] udpv6_sendmsg+0x1f38/0x2540 net/ipv6/udp.c:1272
 [<ffffffff832eafec>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753
 [<ffffffff82ed0b9a>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed0b9a>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82ed2751>] ___sys_sendmsg+0x6d1/0x7e0 net/socket.c:1968
 [<ffffffff82ed4786>] __sys_sendmsg+0xd6/0x190 net/socket.c:2002
 [<ffffffff82ed486d>] SYSC_sendmsg net/socket.c:2013 [inline]
 [<ffffffff82ed486d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2009
 [<ffffffff838ad645>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..