------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: lib/refcount.c:31 at refcount_warn_saturate+0x7c/0x130 lib/refcount.c:31, CPU#1: kworker/u8:1/32
Modules linked in:
CPU: 1 UID: 0 PID: 32 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound linkwatch_event
RIP: 0010:refcount_warn_saturate+0x7c/0x130 lib/refcount.c:31
Code: 20 d1 af 87 e8 85 20 e3 fe 83 fd 02 0f 84 a1 00 00 00 76 27 83 fd 03 74 7d 83 fd 04 75 3e e8 5b 25 e3 fe 48 8d 3d c4 ee 25 08 <67> 48 0f b9 3a e8 4a 25 e3 fe 5b 5d e9 83 e1 a0 04 85 ed 74 3a e8
RSP: 0018:ffffc90000227878 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88813383c65c RCX: ffffffff82cf2e2b
RDX: ffff888103edbb80 RSI: ffffffff82cf2e45 RDI: ffffffff8af51d10
RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff92000044f14
R13: ffff88813383c65c R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882687a9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005592b3561da8 CR3: 0000000115e86000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:461 [inline]
 refcount_dec include/linux/refcount.h:476 [inline]
 ref_tracker_free+0x5cd/0x6c0 lib/ref_tracker.c:303
 netdev_tracker_free include/linux/netdevice.h:4491 [inline]
 netdev_put include/linux/netdevice.h:4508 [inline]
 netdev_put include/linux/netdevice.h:4504 [inline]
 netdev_watchdog_down net/sched/sch_generic.c:600 [inline]
 dev_deactivate_many+0x28c/0xfe0 net/sched/sch_generic.c:1363
 dev_deactivate+0x109/0x1d0 net/sched/sch_generic.c:1397
 linkwatch_do_dev net/core/link_watch.c:184 [inline]
 linkwatch_do_dev+0xd3/0x120 net/core/link_watch.c:166
 __linkwatch_run_queue+0x3a5/0x810 net/core/link_watch.c:240
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:314
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
 process_scheduled_works kernel/workqueue.c:3385 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3466
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	20 d1                	and    %dl,%cl
   2:	af                   	scas   %es:(%rdi),%eax
   3:	87 e8                	xchg   %ebp,%eax
   5:	85 20                	test   %esp,(%rax)
   7:	e3 fe                	jrcxz  0x7
   9:	83 fd 02             	cmp    $0x2,%ebp
   c:	0f 84 a1 00 00 00    	je     0xb3
  12:	76 27                	jbe    0x3b
  14:	83 fd 03             	cmp    $0x3,%ebp
  17:	74 7d                	je     0x96
  19:	83 fd 04             	cmp    $0x4,%ebp
  1c:	75 3e                	jne    0x5c
  1e:	e8 5b 25 e3 fe       	call   0xfee3257e
  23:	48 8d 3d c4 ee 25 08 	lea    0x825eec4(%rip),%rdi        # 0x825eeee
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e8 4a 25 e3 fe       	call   0xfee3257e
  34:	5b                   	pop    %rbx
  35:	5d                   	pop    %rbp
  36:	e9 83 e1 a0 04       	jmp    0x4a0e1be
  3b:	85 ed                	test   %ebp,%ebp
  3d:	74 3a                	je     0x79
  3f:	e8                   	.byte 0xe8