------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: CPU: 1 PID: 25603 at kernel/workqueue.c:2255 __queue_work+0xd03/0x1160 kernel/workqueue.c:2254
Modules linked in:
CPU: 1 UID: 0 PID: 25603 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__queue_work+0xd03/0x1160 kernel/workqueue.c:2254
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4b 04 00 00 48 8b 75 18 4c 89 fa 48 c7 c7 20 01 ac 8b e8 be 1e f7 ff 90 <0f> 0b 90 90 e9 2f f7 ff ff e8 8f 7b 38 00 90 0f 0b 90 e9 b4 f5 ff
RSP: 0018:ffffc900006a0be8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a3388
RDX: ffff888037034880 RSI: ffffffff817a3395 RDI: 0000000000000001
RBP: ffff888058530970 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920000d418f
R13: 0000000080000101 R14: ffffffff81832490 R15: ffff8880552e7978
FS:  0000555587885500(0000) GS:ffff8880d67b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe9e22ff8 CR3: 0000000037110000 CR4: 0000000000352ef0
DR0: 0000000100000000 DR1: 0000000000001000 DR2: 0000000000000009
DR3: 0000000000000800 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x197/0x620 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1793 [inline]
 __run_timers+0x569/0x960 kernel/time/timer.c:2372
 __run_timer_base kernel/time/timer.c:2384 [inline]
 __run_timer_base kernel/time/timer.c:2376 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2393
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mas_node_count_gfp+0x0/0x130 lib/maple_tree.c:1332
Code: 89 ef e8 23 18 97 f6 e9 3a fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 56 41 55 41 89 d5 41 54 49 89 fc 55 48 63 ee 53 e8 8a b6 30 f6
RSP: 0018:ffffc9000c107af8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8b8ee3e0
RDX: 0000000000002800 RSI: 0000000000000001 RDI: ffffc9000c107c98
RBP: 0000000000000005 R08: 0000000000000005 R09: 0000000000000009
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc9000c107c98 R14: ffffc9000c107c98 R15: ffff88803813f1a0
 mas_node_count lib/maple_tree.c:1351 [inline]
 mas_wr_preallocate lib/maple_tree.c:4292 [inline]
 mas_erase+0xbce/0x1370 lib/maple_tree.c:6258
 mtree_erase+0xc7/0x110 lib/maple_tree.c:6591
 simple_offset_remove+0x4f/0x90 fs/libfs.c:333
 shmem_unlink+0xdf/0x350 mm/shmem.c:4035
 vfs_unlink+0x2fe/0x9b0 fs/namei.c:4586
 do_unlinkat+0x4c5/0x6a0 fs/namei.c:4650
 __do_sys_unlink fs/namei.c:4696 [inline]
 __se_sys_unlink fs/namei.c:4694 [inline]
 __x64_sys_unlink+0xc5/0x110 fs/namei.c:4694
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f519fb8e197
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffe9e231c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f519fb8e197
RDX: 00007fffe9e231f0 RSI: 00007fffe9e23280 RDI: 00007fffe9e23280
RBP: 00007fffe9e23280 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffe9e24310
R13: 00007f519fc11c05 R14: 000000000006299e R15: 00007fffe9e24350
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 ef                	mov    %ebp,%edi
   2:	e8 23 18 97 f6       	call   0xf697182a
   7:	e9 3a fc ff ff       	jmp    0xfffffc46
   c:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  13:	00 00 00 00
  17:	0f 1f 00             	nopl   (%rax)
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
* 2a:	41 56                	push   %r14 <-- trapping instruction
  2c:	41 55                	push   %r13
  2e:	41 89 d5             	mov    %edx,%r13d
  31:	41 54                	push   %r12
  33:	49 89 fc             	mov    %rdi,%r12
  36:	55                   	push   %rbp
  37:	48 63 ee             	movslq %esi,%rbp
  3a:	53                   	push   %rbx
  3b:	e8 8a b6 30 f6       	call   0xf630b6ca