Bluetooth: hci1: Opcode 0x c03 failed: -110
Bluetooth: hci2: command 0x0409 tx timeout
Bluetooth: hci0: command 0x0409 tx timeout
======================================================
WARNING: possible circular locking dependency detected
6.2.0-next-20230224 #1 Not tainted
------------------------------------------------------
syz-executor.7/269 is trying to acquire lock:
ffff888016794880 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: __flush_work+0xdd/0xd80
but task is already holding lock:
ffff888016794920 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}, at: hci_cmd_sync_clear+0x45/0x250
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}:
__mutex_lock+0x133/0x14a0
hci_cmd_sync_work+0x1e6/0x320
process_one_work+0xa0f/0x1790
worker_thread+0x63b/0x1260
kthread+0x2e9/0x3a0
ret_from_fork+0x2c/0x50
-> #0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}:
__lock_acquire+0x2d56/0x6380
lock_acquire.part.0+0xea/0x320
__flush_work+0x109/0xd80
__cancel_work_timer+0x39c/0x4e0
hci_cmd_sync_clear+0x52/0x250
hci_unregister_dev+0xf9/0x410
vhci_release+0x80/0x100
__fput+0x263/0xa40
task_work_run+0x174/0x280
do_exit+0xad8/0x2800
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&hdev->cmd_sync_work_lock);
lock((work_completion)(&hdev->cmd_sync_work));
lock(&hdev->cmd_sync_work_lock);
lock((work_completion)(&hdev->cmd_sync_work));
*** DEADLOCK ***
1 lock held by syz-executor.7/269:
#0: ffff888016794920 (&hdev->cmd_sync_work_lock){+.+.}-{3:3}, at: hci_cmd_sync_clear+0x45/0x250
stack backtrace:
CPU: 0 PID: 269 Comm: syz-executor.7 Not tainted 6.2.0-next-20230224 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x91/0xf0
check_noncircular+0x263/0x2e0
__lock_acquire+0x2d56/0x6380
lock_acquire.part.0+0xea/0x320
__flush_work+0x109/0xd80
__cancel_work_timer+0x39c/0x4e0
hci_cmd_sync_clear+0x52/0x250
hci_unregister_dev+0xf9/0x410
vhci_release+0x80/0x100
__fput+0x263/0xa40
task_work_run+0x174/0x280
do_exit+0xad8/0x2800
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fd516c32b19
Code: Unable to access opcode bytes at 0x7fd516c32aef.
RSP: 002b:00007ffd418576f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ffd41857ed8 RCX: 00007fd516c32b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000026 R09: 00007ffd41857ed8
R10: 0000000000000020 R11: 0000000000000246 R12: 00007fd516c8c233
R13: 0000000000000002 R14: 0000000000000000 R15: 00000000000000f8
</TASK>
Bluetooth: hci3: command 0x0409 tx timeout
Bluetooth: hci6: command 0x0409 tx timeout
Bluetooth: hci4: command 0x0409 tx timeout
Bluetooth: hci7: command 0x0409 tx timeout
Bluetooth: hci5: command 0x0409 tx timeout
Bluetooth: hci0: command 0x041b tx timeout
Bluetooth: hci2: command 0x041b tx timeout
Bluetooth: hci3: command 0x041b tx timeout
Bluetooth: hci4: command 0x041b tx timeout
Bluetooth: hci6: command 0x041b tx timeout
Bluetooth: hci7: command 0x041b tx timeout
Bluetooth: hci5: command 0x041b tx timeout
Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci1: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci2: command 0x040f tx timeout
Bluetooth: hci0: command 0x040f tx timeout
Bluetooth: hci3: command 0x040f tx timeout
Bluetooth: hci6: command 0x040f tx timeout
Bluetooth: hci4: command 0x040f tx timeout
Bluetooth: hci7: command 0x040f tx timeout
Bluetooth: hci5: command 0x040f tx timeout
Bluetooth: hci1: command 0x0409 tx timeout
Bluetooth: hci0: command 0x0419 tx timeout
Bluetooth: hci2: command 0x0419 tx timeout
Bluetooth: hci3: command 0x0419 tx timeout
Bluetooth: hci7: command 0x0419 tx timeout
Bluetooth: hci4: command 0x0419 tx timeout
Bluetooth: hci6: command 0x0419 tx timeout
Bluetooth: hci5: command 0x0419 tx timeout
Bluetooth: hci1: command 0x041b tx timeout
Bluetooth: hci1: command 0x040f tx timeout