IPVS: stop unused estimator thread 0...
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at net/xfrm/xfrm_state.c:3308 xfrm_state_fini+0x289/0x2f0
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 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+0x289/0x2f0
Code: 41 5f 5d e9 a9 a3 e1 f7 e8 74 77 9d f7 90 0f 0b 90 e9 fd fd ff ff e8 66 77 9d f7 90 0f 0b 90 e9 60 fe ff ff e8 58 77 9d f7 90 <0f> 0b 90 43 80 3c 2c 00 0f 85 c7 fe ff ff e9 ca fe ff ff e8 3f 77
RSP: 0018:ffffc900000f7898 EFLAGS: 00010293
RAX: ffffffff8a223438 RBX: ffff88812454c880 RCX: ffff88801c2f5640
RDX: 0000000000000000 RSI: ffffffff8d9b77e3 RDI: ffffffff8be33680
RBP: 0000000000000040 R08: ffffffff8fa38a37 R09: 1ffffffff1f47146
R10: dffffc0000000000 R11: fffffbfff1f47147 R12: 1ffff110248a9ba4
R13: dffffc0000000000 R14: ffff88812454dd20 R15: ffff888023d23900
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32111ff8 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_net_exit+0x2d/0x70
 ops_undo_list+0x49a/0x990
 cleanup_net+0x4c5/0x800
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
