------------[ 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/u8:3/46
Modules linked in:
CPU: 1 UID: 0 PID: 46 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound linkwatch_event
RIP: 0010:refcount_warn_saturate+0x7c/0x130 lib/refcount.c:31
Code: 60 31 af 87 e8 e5 d3 e5 fe 83 fd 02 0f 84 a1 00 00 00 76 27 83 fd 03 74 7d 83 fd 04 75 3e e8 bb d8 e5 fe 48 8d 3d 84 6c 28 08 <67> 48 0f b9 3a e8 aa d8 e5 fe 5b 5d e9 43 89 9f 04 85 ed 74 3a e8
RSP: 0018:ffffc90000517890 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888133aa461c RCX: ffffffff82cbe12b
RDX: ffff88810a693a00 RSI: ffffffff82cbe145 RDI: ffffffff8af44dd0
RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff920000a2f17
R13: ffff888133aa461c R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882687d3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b335f8ff8 CR3: 00000001097e6000 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:4423 [inline]
 netdev_put include/linux/netdevice.h:4440 [inline]
 netdev_put include/linux/netdevice.h:4436 [inline]
 netdev_watchdog_down net/sched/sch_generic.c:575 [inline]
 dev_deactivate_many+0x288/0xc40 net/sched/sch_generic.c:1364
 dev_deactivate+0xf8/0x1c0 net/sched/sch_generic.c:1395
 linkwatch_do_dev net/core/link_watch.c:184 [inline]
 linkwatch_do_dev+0xce/0x110 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+0x9d7/0x1920 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3358 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	31 af 87 e8 e5 d3    	xor    %ebp,-0x2c1a1779(%rdi)
   6:	e5 fe                	in     $0xfe,%eax
   8:	83 fd 02             	cmp    $0x2,%ebp
   b:	0f 84 a1 00 00 00    	je     0xb2
  11:	76 27                	jbe    0x3a
  13:	83 fd 03             	cmp    $0x3,%ebp
  16:	74 7d                	je     0x95
  18:	83 fd 04             	cmp    $0x4,%ebp
  1b:	75 3e                	jne    0x5b
  1d:	e8 bb d8 e5 fe       	call   0xfee5d8dd
  22:	48 8d 3d 84 6c 28 08 	lea    0x8286c84(%rip),%rdi        # 0x8286cad
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	e8 aa d8 e5 fe       	call   0xfee5d8dd
  33:	5b                   	pop    %rbx
  34:	5d                   	pop    %rbp
  35:	e9 43 89 9f 04       	jmp    0x49f897d
  3a:	85 ed                	test   %ebp,%ebp
  3c:	74 3a                	je     0x78
  3e:	e8                   	.byte 0xe8