BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3, name: pool_workqueue_
preempt_count: 100, expected: 0
RCU nest depth: 0, expected: 0
locks held by pool_workqueue_/3: 1, last CPU#1:
 #0: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<ffffffff8189124b>] softirq_handle_begin kernel/softirq.c:486 [inline]
[<ffffffff8189124b>] handle_softirqs+0xab/0x860 kernel/softirq.c:621
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x36a/0x4c0 kernel/sched/core.c:9264
 __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4561
 mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lockdep_unregister_key+0x2d4/0x350 kernel/locking/lockdep.c:6712
Code: e9 71 16 09 00 48 c7 c7 90 d9 9b 96 89 c6 e8 53 7a 46 0a e9 66 fe ff ff e8 89 a8 43 0a 41 f7 c7 00 02 00 00 74 b4 fb 40 84 ed <75> b3 eb c4 90 0f 0b 90 e9 27 ff ff ff 90 0f 0b 90 e9 2f ff ff ff
RSP: 0018:ffffc90000087c88 EFLAGS: 00000246
RAX: 0000000000000046 RBX: ffff8880121af930 RCX: 0000000000000046
RDX: ffffffff945754f8 RSI: ffffffff8e431d70 RDI: ffffffff8c6dad80
RBP: ffff88801dae1f00 R08: ffffffff81b10378 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000010f89 R12: 0000000000000000
R13: ffff8880121af931 R14: 0000000000001000 R15: 0000000000000a03
 wq_unregister_lockdep kernel/workqueue.c:5023 [inline]
 pwq_release_workfn+0x7ab/0x970 kernel/workqueue.c:5319
 kthread_worker_fn+0x4eb/0xb20 kernel/kthread.c:1025
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
ODEBUG: object ffffc90000a18a80 is NOT on stack ffffc90000080000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#1: pool_workqueue_/3
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#1: pool_workqueue_/3
WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#1: pool_workqueue_/3
Modules linked in:
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:705 [inline]
RIP: 0010:__debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798
Code: fe 06 cc 41 ff c7 44 89 3d 69 0c e8 15 48 c7 c1 80 b6 6d 8c 48 c7 c7 e0 b6 6d 8c 84 c0 48 0f 45 f9 48 89 de e8 ad 5e 3c fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 41 67 6d 0a 3b 05 3f
RSP: 0018:ffffc90000a189b8 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc90000a18a80 RCX: 529afc7afc255300
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff88801dae1f60 R08: 0000000000000100 R09: 1ffff110170e48e2
R10: dffffc0000000000 R11: ffffed10170e48e3 R12: 1ffff9200014314c
R13: ffff8880588090e0 R14: dffffc0000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888124dc6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87fb3d7286 CR3: 000000000eb48000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __synchronize_srcu+0x1d5/0x2f0 kernel/rcu/srcutree.c:1475
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister+0x129/0x3f0 drivers/base/power/wakeup.c:237
 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:69
 device_release+0xc4/0x1f0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x222/0x550 lib/kobject.c:737
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lockdep_unregister_key+0x2d4/0x350 kernel/locking/lockdep.c:6712
Code: e9 71 16 09 00 48 c7 c7 90 d9 9b 96 89 c6 e8 53 7a 46 0a e9 66 fe ff ff e8 89 a8 43 0a 41 f7 c7 00 02 00 00 74 b4 fb 40 84 ed <75> b3 eb c4 90 0f 0b 90 e9 27 ff ff ff 90 0f 0b 90 e9 2f ff ff ff
RSP: 0018:ffffc90000087c88 EFLAGS: 00000246
RAX: 0000000000000046 RBX: ffff8880121af930 RCX: 0000000000000046
RDX: ffffffff945754f8 RSI: ffffffff8e431d70 RDI: ffffffff8c6dad80
RBP: ffff88801dae1f00 R08: ffffffff81b10378 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000010f89 R12: 0000000000000000
R13: ffff8880121af931 R14: 0000000000001000 R15: 0000000000000a03
 wq_unregister_lockdep kernel/workqueue.c:5023 [inline]
 pwq_release_workfn+0x7ab/0x970 kernel/workqueue.c:5319
 kthread_worker_fn+0x4eb/0xb20 kernel/kthread.c:1025
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:	e9 71 16 09 00       	jmp    0x91676
   5:	48 c7 c7 90 d9 9b 96 	mov    $0xffffffff969bd990,%rdi
   c:	89 c6                	mov    %eax,%esi
   e:	e8 53 7a 46 0a       	call   0xa467a66
  13:	e9 66 fe ff ff       	jmp    0xfffffe7e
  18:	e8 89 a8 43 0a       	call   0xa43a8a6
  1d:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  24:	74 b4                	je     0xffffffda
  26:	fb                   	sti
  27:	40 84 ed             	test   %bpl,%bpl
* 2a:	75 b3                	jne    0xffffffdf <-- trapping instruction
  2c:	eb c4                	jmp    0xfffffff2
  2e:	90                   	nop
  2f:	0f 0b                	ud2
  31:	90                   	nop
  32:	e9 27 ff ff ff       	jmp    0xffffff5e
  37:	90                   	nop
  38:	0f 0b                	ud2
  3a:	90                   	nop
  3b:	e9 2f ff ff ff       	jmp    0xffffff6f