------------[ cut here ]------------
WARNING: CPU: 1 PID: 13 at net/ipv6/xfrm6_tunnel.c:341 xfrm6_tunnel_net_exit+0x7e/0x100
Modules linked in:
CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:xfrm6_tunnel_net_exit+0x7e/0x100
Code: a8 7f 21 f8 4b 83 3c 2c 00 75 19 e8 ac fe bd f7 49 81 fd f8 07 00 00 74 1d e8 9e fe bd f7 49 83 c5 08 eb c9 e8 93 fe bd f7 90 <0f> 0b 90 49 81 fd f8 07 00 00 75 e3 48 81 c3 00 08 00 00 45 31 f6
RSP: 0018:ffffc900001078b0 EFLAGS: 00010293
RAX: ffffffff8a00178d RBX: ffff88802d17c000 RCX: ffff88801bef0000
RDX: 0000000000000000 RSI: ffffffff8d531ee2 RDI: ffff88802d17c000
RBP: ffffc900001079b0 R08: ffffffff8f5cac37 R09: 1ffffffff1eb9586
R10: dffffc0000000000 R11: fffffbfff1eb9587 R12: ffff88802d17c000
R13: 0000000000000000 R14: ffff88810952a480 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881a417e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1de3455fc8 CR3: 0000000042376000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ops_undo_list+0x49a/0x990
 cleanup_net+0x4d8/0x820
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
