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workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd4a/0x10a0, CPU#1: syz.0.1/5742
Modules linked in:
CPU: 1 UID: 0 PID: 5742 Comm: syz.0.1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__queue_work+0xd66/0x10a0
Code: 49 81 c7 70 01 00 00 4c 8d 35 d6 da cc 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 14 ba a6 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90000a08bc8 EFLAGS: 00010046
RAX: 1ffff110379e514e RBX: dffffc0000000000 RCX: ffff8881713d0000
RDX: ffff8881befe6170 RSI: ffffffff8ac24220 RDI: ffffffff905ab530
RBP: 0000000000000100 R08: ffffffff90578937 R09: 1ffffffff20af126
R10: dffffc0000000000 R11: ffffffff818de180 R12: 0000000000000008
R13: ffff8881bcf28a58 R14: ffffffff905ab530 R15: ffff8881befe6170
FS:  00007f1df94c46c0(0000) GS:ffff8882a8f51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fac867556c8 CR3: 0000000174730000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x67e/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x225/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x417/0xc60
Code: 04 00 00 41 c7 84 24 20 0e 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 63 8a 3d 0a e8 8e a9 39 00 fb 4c 8b 65 c8 <49> 8d bc 24 f8 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc900065ff440 EFLAGS: 00000202
RAX: 0000000000001cf1 RBX: ffff88823c63bf20 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8e22c21b RDI: ffffffff8c4bdb80
RBP: ffffc900065ff490 R08: ffffffff90578937 R09: 1ffffffff20af126
R10: dffffc0000000000 R11: fffffbfff20af127 R12: ffff8881713d0000
R13: ffff88823c63bee8 R14: dffffc0000000000 R15: 1ffff110478c77e4
 __schedule+0x17e1/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 61 af 2d 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 4b 3a ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 38 62 b8
RSP: 0018:ffffc900065ff7c8 EFLAGS: 00000282
RAX: 8702e5dde25f4c00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffffff941b95f0 RSI: ffffffff8e4b1839 RDI: ffffffff8c4bdb80
RBP: ffffffff818e1b55 R08: 0000000000000008 R09: ffffffff9692f480
R10: 00000000880a910d R11: 00000000f3aa9c10 R12: 0000000000000000
R13: ffff8881befe6140 R14: 0000000000000001 R15: 0000000000000246
 touch_wq_lockdep_map+0xcb/0x180
 __flush_workqueue+0x148/0x1470
 drain_workqueue+0xce/0x380
 hci_dev_close_sync+0x60e/0x10a0
 hci_dev_do_close+0x30/0xc0
 hci_rfkill_set_block+0x1f4/0x290
 rfkill_set_block+0x19f/0x4d0
 rfkill_fop_write+0x43b/0x560
 vfs_write+0x296/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1df859e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1df94c4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1df8825fa0 RCX: 00007f1df859e019
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f1df863500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1df8826038 R14: 00007f1df8825fa0 R15: 00007fff259c4058
 </TASK>
