process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
 kthread+0x3b3/0x730 kernel/kthread.c:463
 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
------------[ cut here ]------------
1
WARNING: lib/ref_tracker.c:323 at ref_tracker_free.cold+0x116/0x154 lib/ref_tracker.c:323, CPU#0: kworker/u32:2/46
Modules linked in:
CPU: 0 UID: 0 PID: 46 Comm: kworker/u32:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events_unbound linkwatch_event
RIP: 0010:ref_tracker_free.cold+0x116/0x154 lib/ref_tracker.c:323
Code: 48 c1 e0 2a 0f b6 04 02 84 c0 74 04 3c 03 7e 4e 8b 7b 18 e8 f8 a6 e4 03 e8 83 d0 cf 00 48 8b 34 24 48 89 ef e8 c7 6a 42 0a 90 <0f> 0b 90 bb ea ff ff ff e9 02 d1 e4 03 4c 89 f7 e8 f1 1e 3a 01 e9
RSP: 0018:ffffc900007ef828 EFLAGS: 00010202
RAX: 0000000000000201 RBX: ffff8880296af7c0 RCX: 0000000000000000
RDX: 0000000000000202 RSI: ffffffff8dc454ef RDI: 0000000000000001
RBP: ffff888029340618 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff920000fdf07
R13: ffffc900007ef858 R14: ffff8880296af7d8 R15: 00000000038c08d9
FS:  0000000000000000(0000) GS:ffff8880d65db000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000e392000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 0000000000000003 DR2: 0000000000000086
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_tracker_free include/linux/netdevice.h:4420 [inline]
 netdev_put include/linux/netdevice.h:4437 [inline]
 netdev_put include/linux/netdevice.h:4433 [inline]
 netdev_watchdog_down net/sched/sch_generic.c:575 [inline]
 dev_deactivate_many+0x28f/0xc50 net/sched/sch_generic.c:1366
 dev_deactivate+0xf8/0x1c0 net/sched/sch_generic.c:1397
 linkwatch_do_dev+0x113/0x160 net/core/link_watch.c:184
 __linkwatch_run_queue+0x3ab/0x8a0 net/core/link_watch.c:244
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
 process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
 kthread+0x3b3/0x730 kernel/kthread.c:463
 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>