------------[ cut here ]------------
WARNING: CPU: 1 PID: 5778 at kernel/workqueue.c:1745 is_chained_work kernel/workqueue.c:1691 [inline]
WARNING: CPU: 1 PID: 5778 at kernel/workqueue.c:1745 __queue_work+0xd0c/0xfd0 kernel/workqueue.c:1745
Modules linked in:
CPU: 1 PID: 5778 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/13/2026
RIP: 0010:__queue_work+0xd0c/0xfd0 kernel/workqueue.c:1745
Code: 49 8d 54 24 68 4c 89 e7 4c 89 f6 89 e9 e8 9c e6 00 00 e9 0c ff ff ff e8 12 8f 2f 00 eb 0c e8 0b 8f 2f 00 eb 05 e8 04 8f 2f 00 <0f> 0b 48 83 c4 78 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ee 8e 2f 00
RSP: 0018:ffffc900001f0af0 EFLAGS: 00010046
RAX: ffffffff8157565e RBX: 0000000000000100 RCX: ffff888026e11e00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8e8c6b2f R09: 1ffffffff1d18d65
R10: dffffc0000000000 R11: fffffbfff1d18d66 R12: 0000000000000008
R13: ffff88807bb20978 R14: ffff88807bb209c0 R15: ffff88802c210c00
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6578027dac CR3: 00000000310ac000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1747 [inline]
 __run_timers+0x59c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5758
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900047df760 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: a63824b910db4e00
RDX: 0000000000000001 RSI: ffffffff8acadce0 RDI: ffffffff8b1cfa20
RBP: ffffc900047df868 R08: dffffc0000000000 R09: 1ffffffff2750ca6
R10: dffffc0000000000 R11: fffffbfff2750ca7 R12: 1ffff920008fbef8
R13: ffff88802c210d38 R14: 0000000000000246 R15: dffffc0000000000
 touch_wq_lockdep_map kernel/workqueue.c:3179 [inline]
 __flush_workqueue+0x169/0x1380 kernel/workqueue.c:3209
 drain_workqueue+0xce/0x370 kernel/workqueue.c:3373
 hci_dev_close_sync+0x542/0x1130 net/bluetooth/hci_sync.c:5291
 hci_dev_do_close net/bluetooth/hci_core.c:523 [inline]
 hci_unregister_dev+0x21a/0x500 net/bluetooth/hci_core.c:2709
 vhci_release+0x170/0x1c0 drivers/bluetooth/hci_vhci.c:691
 __fput+0x221/0x940 fs/file_table.c:418
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x986/0x2530 kernel/exit.c:884
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1026
 __do_sys_exit_group kernel/exit.c:1037 [inline]
 __se_sys_exit_group kernel/exit.c:1035 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1035
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f102fb9de99
Code: Unable to access opcode bytes at 0x7f102fb9de6f.
RSP: 002b:00007ffc7807cdf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f102fc3332f RCX: 00007f102fb9de99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007f102fc3330a
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc7807e0b0
R13: 00007f102fc3330a R14: 0000000000014c1f R15: 00007ffc7807f180
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 84 24 80 00 00 00 	testl  $0x200,0x80(%rsp)
   7:	00 02 00 00
   b:	43 c6 44 3c 04 f8    	movb   $0xf8,0x4(%r12,%r15,1)
  11:	0f 85 f0 00 00 00    	jne    0x107
  17:	41 f7 c6 00 02 00 00 	test   $0x200,%r14d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	48 c7 44 24 60 0e 36 	movq   $0x45e0360e,0x60(%rsp)
  28:	e0 45
* 2a:	4b c7 04 3c 00 00 00 	movq   $0x0,(%r12,%r15,1) <-- trapping instruction
  31:	00
  32:	43 c7 44 3c 08 00 00 	movl   $0x0,0x8(%r12,%r15,1)
  39:	00 00
  3b:	65                   	gs
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	04 25                	add    $0x25,%al