------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci4
WARNING: kernel/workqueue.c:2305 at __queue_work+0xd2d/0x12b0 kernel/workqueue.c:2304, CPU#3: syz.5.1609/26742
Modules linked in:
CPU: 3 UID: 0 PID: 26742 Comm: syz.5.1609 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__queue_work+0xd31/0x12b0 kernel/workqueue.c:2304
Code: 00 00 00 fc ff df 49 8d 94 24 70 01 00 00 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 52 05 00 00 48 8d 3d b3 08 30 0f 48 8b 75 18 <67> 48 0f b9 3a 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03
RSP: 0018:ffffc900006f8be0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000100 RCX: 1ffff1100af2914e
RDX: ffff888058b13970 RSI: ffffffff8a905390 RDI: ffffffff90feef40
RBP: ffff888057948a58 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000000 R12: ffff888058b13800
R13: 0000000000000000 R14: ffffffff81ceec20 R15: 0000000000000001
FS:  000055556d196500(0000) GS:ffff8880d63e0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0498745690 CR3: 000000005a59c000 CR4: 0000000000352ef0
DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers+0x570/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 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:__kasan_check_read+0x8/0x20 mm/kasan/shadow.c:31
Code: fe 90 0f 0b 90 48 83 c4 60 5b 5d 41 5c e9 c0 18 26 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f6 31 d2 e9 0f f3 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f
RSP: 0018:ffffc900214ff370 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88802cf26000 RCX: ffffffff82ce3a64
RDX: 1ffff110059e4ccd RSI: 0000000000000008 RDI: ffff88802f60a408
RBP: ffff88802f60a408 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802cf26668
R13: ffff88802f60a000 R14: 0000000000000001 R15: 00000000000019ec
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 ext4_emergency_ro fs/ext4/ext4.h:2409 [inline]
 ext4_emergency_state fs/ext4/ext4.h:2416 [inline]
 ext4_journal_check_start+0xd4/0x340 fs/ext4/ext4_jbd2.c:71
 __ext4_journal_start_sb+0xb0/0x670 fs/ext4/ext4_jbd2.c:107
 __ext4_journal_start fs/ext4/ext4_jbd2.h:242 [inline]
 ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:6636
 __mark_inode_dirty+0x1f3/0x16e0 fs/fs-writeback.c:2709
 generic_update_time fs/inode.c:2257 [inline]
 touch_atime+0x645/0x760 fs/inode.c:2332
 file_accessed include/linux/fs.h:2272 [inline]
 ext4_file_mmap_prepare+0x56d/0x670 fs/ext4/file.c:840
 vfs_mmap_prepare include/linux/fs.h:2071 [inline]
 call_mmap_prepare mm/vma.c:2672 [inline]
 __mmap_region+0xe7e/0x2db0 mm/vma.c:2758
 mmap_region+0x527/0x620 mm/vma.c:2860
 do_mmap+0xc63/0x12f0 mm/mmap.c:560
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f049799cbc2
Code: 4f 01 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6e 5b 5d c3 0f 1f 00 48 c7 c0 e8 ff ff ff 64
RSP: 002b:00007ffdc6052108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b32f64000 RCX: 00007f049799cbc2
RDX: 0000000000000003 RSI: 00000000003c0000 RDI: 0000001b32f64000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000029
R13: 00000000000927c0 R14: 000000000002519a R15: 00007ffdc60523e0
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 fc                	add    %bh,%ah
   4:	ff                   	lcall  (bad)
   5:	df 49 8d             	fisttps -0x73(%rcx)
   8:	94                   	xchg   %eax,%esp
   9:	24 70                	and    $0x70,%al
   b:	01 00                	add    %eax,(%rax)
   d:	00 48 89             	add    %cl,-0x77(%rax)
  10:	f9                   	stc
  11:	48 c1 e9 03          	shr    $0x3,%rcx
  15:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  19:	0f 85 52 05 00 00    	jne    0x571
  1f:	48 8d 3d b3 08 30 0f 	lea    0xf3008b3(%rip),%rdi        # 0xf3008d9
  26:	48 8b 75 18          	mov    0x18(%rbp),%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  36:	fc ff df
  39:	48 89 ea             	mov    %rbp,%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx