================================
WARNING: inconsistent lock state
5.10.60 #1 Not tainted
--------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
syz-executor.3/21463 [HC0[0]:SC0[0]:HE1:SE1] takes:
ffff88800f33f0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff88800f33f0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
{IN-SOFTIRQ-W} state was registered at:
  lock_acquire kernel/locking/lockdep.c:5560 [inline]
  lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:151
  spin_lock include/linux/spinlock.h:354 [inline]
  sco_sock_timeout+0x24/0x150 net/bluetooth/sco.c:83
  call_timer_fn+0x182/0x580 kernel/time/timer.c:1414
  expire_timers kernel/time/timer.c:1459 [inline]
  __run_timers.part.0+0x666/0x9d0 kernel/time/timer.c:1750
  __run_timers kernel/time/timer.c:1731 [inline]
  run_timer_softirq+0x80/0x120 kernel/time/timer.c:1763
  __do_softirq+0x1b6/0x86a kernel/softirq.c:298
  asm_call_irq_on_stack+0x12/0x20
  __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
  run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
  do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77
  invoke_softirq kernel/softirq.c:393 [inline]
  __irq_exit_rcu kernel/softirq.c:423 [inline]
  irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:435
  sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095
  asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
  native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
  arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
  __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
  _raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191
  scan_object mm/kmemleak.c:1359 [inline]
  scan_gray_list+0x236/0x370 mm/kmemleak.c:1381
  kmemleak_scan+0x4fe/0x1140 mm/kmemleak.c:1489
  kmemleak_write+0x55a/0x660 mm/kmemleak.c:1820
  full_proxy_write+0x11d/0x190 fs/debugfs/file.c:234
  vfs_write+0x295/0xa50 fs/read_write.c:603
  ksys_write+0x12d/0x250 fs/read_write.c:658
  do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
irq event stamp: 7479
hardirqs last  enabled at (7479): [<ffffffff83d9d3bf>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last  enabled at (7479): [<ffffffff83d9d3bf>] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199
hardirqs last disabled at (7478): [<ffffffff83d9d1ce>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (7478): [<ffffffff83d9d1ce>] _raw_spin_lock_irq+0x3e/0x40 kernel/locking/spinlock.c:167
softirqs last  enabled at (7156): [<ffffffff83e00f92>] asm_call_irq_on_stack+0x12/0x20
softirqs last disabled at (7053): [<ffffffff83e00f92>] asm_call_irq_on_stack+0x12/0x20

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(slock-AF_BLUETOOTH-BTPROTO_SCO);
  <Interrupt>
    lock(slock-AF_BLUETOOTH-BTPROTO_SCO);

 *** DEADLOCK ***

4 locks held by syz-executor.3/21463:
 #0: ffffffff85418888 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xfe/0x4b0 net/rfkill/core.c:1232
 #1: ffff88800ddc4f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xee/0x1240 net/bluetooth/hci_core.c:1727
 #2: ffff88800ddc4078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x23f/0x1240 net/bluetooth/hci_core.c:1764
 #3: ffffffff85366d28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1440 [inline]
 #3: ffffffff85366d28 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xc7/0x230 net/bluetooth/hci_conn.c:1557

stack backtrace:
CPU: 0 PID: 21463 Comm: syz-executor.3 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_usage_bug kernel/locking/lockdep.c:3857 [inline]
 valid_state kernel/locking/lockdep.c:3869 [inline]
 mark_lock_irq kernel/locking/lockdep.c:4072 [inline]
 mark_lock.cold+0x19/0x159 kernel/locking/lockdep.c:4529
 mark_usage kernel/locking/lockdep.c:4442 [inline]
 __lock_acquire+0x8cf/0x5b60 kernel/locking/lockdep.c:4904
 lock_acquire kernel/locking/lockdep.c:5560 [inline]
 lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x27/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 sco_conn_del+0x128/0x270 net/bluetooth/sco.c:176
 sco_disconn_cfm net/bluetooth/sco.c:1189 [inline]
 sco_disconn_cfm+0x62/0x80 net/bluetooth/sco.c:1182
 hci_disconn_cfm include/net/bluetooth/hci_core.h:1443 [inline]
 hci_conn_hash_flush+0x119/0x230 net/bluetooth/hci_conn.c:1557
 hci_dev_do_close+0x717/0x1240 net/bluetooth/hci_core.c:1777
 hci_rfkill_set_block+0x154/0x190 net/bluetooth/hci_core.c:2216
 rfkill_set_block+0x20f/0x560 net/rfkill/core.c:341
 rfkill_fop_write+0x252/0x4b0 net/rfkill/core.c:1240
 vfs_write+0x295/0xa50 fs/read_write.c:603
 ksys_write+0x1ee/0x250 fs/read_write.c:658
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f01af7a2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000000000008 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffde93724ef R14: 00007f01af7a2300 R15: 0000000000022000
cgroup: fork rejected by pids controller in /syz5
audit: type=1400 audit(1632518220.087:69): avc:  denied  { create } for  pid=21776 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:auditctl_exec_t:s0 tclass=tcp_socket permissive=1