IPVS: stop unused estimator thread 0...
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5680 at net/xfrm/xfrm_state.c:3306 xfrm_state_fini+0x26d/0x2f0
Modules linked in:
CPU: 0 UID: 0 PID: 5680 Comm: kworker/u8:2 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:xfrm_state_fini+0x26d/0x2f0
Code: c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 eb ad 3a f8 48 8b 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 29 9b 1a f8 e8 b4 f8 d4 f7 90 <0f> 0b 90 e9 fd fd ff ff e8 a6 f8 d4 f7 90 0f 0b 90 e9 60 fe ff ff
RSP: 0018:ffffc90003b97878 EFLAGS: 00010293
RAX: ffffffff89eb0bbc RBX: ffff8881098d2480 RCX: ffff8881125e8000
RDX: 0000000000000000 RSI: ffffffff8d8f3f94 RDI: ffff8881125e8000
RBP: ffffc90003b97990 R08: ffffffff8f7cdb77 R09: 1ffffffff1ef9b6e
R10: dffffc0000000000 R11: fffffbfff1ef9b6f R12: ffffffff8f3c6340
R13: 1ffff92000772f3c R14: ffff8881098d3940 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818eb3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc46a570fc8 CR3: 000000010c910000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_net_exit+0x2d/0x70
 ops_undo_list+0x49a/0x990
 cleanup_net+0x4d8/0x820
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
