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kernel BUG at ./include/linux/skbuff.h:1935!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 22351 Comm: syz-executor4 Not tainted 4.9.51-g70b8b07 #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ca3b9800 task.stack: ffff8801c8378000
RIP: 0010:[<ffffffff834212c0>]  [<ffffffff834212c0>] __skb_pull include/linux/skbuff.h:1935 [inline]
RIP: 0010:[<ffffffff834212c0>]  [<ffffffff834212c0>] __ip6_make_skb+0x11b0/0x1b90 net/ipv6/ip6_output.c:1690
RSP: 0018:ffff8801c837f680  EFLAGS: 00010212
RAX: ffffffff834212c0 RBX: 0000000000000028 RCX: ffffc900029d8000
RDX: 000000000000013c RSI: 0000000000000001 RDI: ffff8801a79c0b60
RBP: ffff8801c837f8a0 R08: ffff8801ac5be6b8 R09: 0000000000000000
R10: 0000000000002100 R11: ffffed00352c8211 R12: ffff8801ac5be6c8
R13: 0000000000001036 R14: ffff8801ac5be6bc R15: ffff8801ac5be640
FS:  00007ff2d3d12700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd9a9dde4c CR3: 00000001d8b58000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801a9640040 ffff8801ac5be6fc ffff8801ac5be710 ffff8801ac5be708
 ffff8801d0f59ec8 1ffff1003906fee2 ffff8801a79c0bc0 ffff8801d86721c0
 0000000000000000 ffff8801d4f51a40 ffff8801a79c0692 ffffed00358b7cd7
Call Trace:
 [<ffffffff834837ba>] ip6_finish_skb include/net/ipv6.h:910 [inline]
 [<ffffffff834837ba>] udp_v6_push_pending_frames+0x20a/0x340 net/ipv6/udp.c:1002
 [<ffffffff83488608>] udpv6_sendmsg+0x1f38/0x2540 net/ipv6/udp.c:1272
 [<ffffffff832e9ddc>] 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
 [<ffffffff838ac285>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 84 c9 0f 85 1c 06 00 00 41 3b 47 7c 72 18 e8 28 93 f4 fd 45 89 ee 4b 8d 04 34 49 89 87 d0 00 00 00 e9 76 f2 ff ff e8 10 93 f4 fd <0f> 0b e8 09 93 f4 fd 48 8b 74 24 40 48 8d 94 24 b0 00 00 00 4c 
RIP  [<ffffffff834212c0>] __skb_pull include/linux/skbuff.h:1935 [inline]
RIP  [<ffffffff834212c0>] __ip6_make_skb+0x11b0/0x1b90 net/ipv6/ip6_output.c:1690
 RSP <ffff8801c837f680>
---[ end trace 043287ef55b5167b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..