------------[ 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#0: kworker/u8:0/12
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound linkwatch_event
RIP: 0010:refcount_warn_saturate+0x7c/0x130 lib/refcount.c:31
Code: e0 53 af 87 e8 05 49 e5 fe 83 fd 02 0f 84 a1 00 00 00 76 27 83 fd 03 74 7d 83 fd 04 75 3e e8 db 4d e5 fe 48 8d 3d 54 d5 27 08 <67> 48 0f b9 3a e8 ca 4d e5 fe 5b 5d e9 83 83 9f 04 85 ed 74 3a e8
RSP: 0018:ffffc900000cf890 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88813eaa061c RCX: ffffffff82cc972b
RDX: ffff888101ec0000 RSI: ffffffff82cc9745 RDI: ffffffff8af46ca0
RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff92000019f17
R13: ffff88813eaa061c R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882686ce000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f033a5fee9c CR3: 0000000120ec2000 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:4455 [inline]
 netdev_put include/linux/netdevice.h:4472 [inline]
 netdev_put include/linux/netdevice.h:4468 [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+0xa23/0x19a0 kernel/workqueue.c:3276
 process_scheduled_works kernel/workqueue.c:3359 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440
 kthread+0x370/0x450 kernel/kthread.c:436
 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), 4 bytes skipped:
   0:	e8 05 49 e5 fe       	call   0xfee5490a
   5:	83 fd 02             	cmp    $0x2,%ebp
   8:	0f 84 a1 00 00 00    	je     0xaf
   e:	76 27                	jbe    0x37
  10:	83 fd 03             	cmp    $0x3,%ebp
  13:	74 7d                	je     0x92
  15:	83 fd 04             	cmp    $0x4,%ebp
  18:	75 3e                	jne    0x58
  1a:	e8 db 4d e5 fe       	call   0xfee54dfa
  1f:	48 8d 3d 54 d5 27 08 	lea    0x827d554(%rip),%rdi        # 0x827d57a
* 26:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2b:	e8 ca 4d e5 fe       	call   0xfee54dfa
  30:	5b                   	pop    %rbx
  31:	5d                   	pop    %rbp
  32:	e9 83 83 9f 04       	jmp    0x49f83ba
  37:	85 ed                	test   %ebp,%ebp
  39:	74 3a                	je     0x75
  3b:	e8                   	.byte 0xe8