BUG: sleeping function called from invalid context at net/core/sock.c:3487
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3562, name: kworker/u5:8
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
6 locks held by kworker/u5:8/3562:
 #0: ffff88805ed3c938 ((wq_completion)hci3#2){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc90003c8fd20 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #2: ffff88807996c078 (&hdev->lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0xaa/0xac0 net/bluetooth/hci_event.c:5021
 #3: ffffffff8e3f0f48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1790 [inline]
 #3: ffffffff8e3f0f48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x4d5/0xac0 net/bluetooth/hci_event.c:5107
 #4: ffff888019f3ec20 (&conn->lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffff888019f3ec20 (&conn->lock#2){+.+.}-{2:2}, at: sco_conn_ready net/bluetooth/sco.c:1278 [inline]
 #4: ffff888019f3ec20 (&conn->lock#2){+.+.}-{2:2}, at: sco_connect_cfm+0x279/0xb10 net/bluetooth/sco.c:1363
 #5: ffff8880739fa130 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline]
 #5: ffff8880739fa130 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1291 [inline]
 #5: ffff8880739fa130 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x450/0xb10 net/bluetooth/sco.c:1363
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 3562 Comm: kworker/u5:8 Not tainted 6.1.100-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci3 hci_rx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 __might_resched+0x5cb/0x780 kernel/sched/core.c:9945
 lock_sock_nested+0x59/0x100 net/core/sock.c:3487
 lock_sock include/net/sock.h:1748 [inline]
 sco_conn_ready net/bluetooth/sco.c:1291 [inline]
 sco_connect_cfm+0x450/0xb10 net/bluetooth/sco.c:1363
 hci_connect_cfm include/net/bluetooth/hci_core.h:1793 [inline]
 hci_sync_conn_complete_evt+0x54b/0xac0 net/bluetooth/hci_event.c:5107
 hci_event_func net/bluetooth/hci_event.c:7539 [inline]
 hci_event_packet+0xa9d/0x1510 net/bluetooth/hci_event.c:7591
 hci_rx_work+0x3cd/0xce0 net/bluetooth/hci_core.c:4129
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Bluetooth: hci3: link tx timeout
Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa

=============================
[ BUG: Invalid wait context ]
6.1.100-syzkaller #0 Tainted: G        W         
-----------------------------
kworker/u5:8/3562 is trying to lock:
ffff88807996c9b0 (&hdev->unregister_lock){+.+.}-{3:3}, at: hci_cmd_sync_submit+0x3b/0x2e0 net/bluetooth/hci_sync.c:702
other info that might help us debug this:
context-{4:4}
3 locks held by kworker/u5:8/3562:
 #0: ffff88805ed3c938 ((wq_completion)hci3#2){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc90003c8fd20 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #2: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #2: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #2: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: hci_link_tx_to net/bluetooth/hci_core.c:3447 [inline]
 #2: ffffffff8d12ad40 (rcu_read_lock){....}-{1:2}, at: __check_timeout+0x181/0x460 net/bluetooth/hci_core.c:3600
stack backtrace:
CPU: 0 PID: 3562 Comm: kworker/u5:8 Tainted: G        W          6.1.100-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci3 hci_tx_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4701 [inline]
 check_wait_context kernel/locking/lockdep.c:4762 [inline]
 __lock_acquire+0x14b1/0x1f80 kernel/locking/lockdep.c:4999
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x132/0xd80 kernel/locking/mutex.c:747
 hci_cmd_sync_submit+0x3b/0x2e0 net/bluetooth/hci_sync.c:702
 hci_disconnect+0xe6/0x2c0 net/bluetooth/hci_conn.c:255
 hci_link_tx_to net/bluetooth/hci_core.c:3454 [inline]
 __check_timeout+0x333/0x460 net/bluetooth/hci_core.c:3600
 hci_sched_le net/bluetooth/hci_core.c:3783 [inline]
 hci_tx_work+0x138b/0x1ec0 net/bluetooth/hci_core.c:3861
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Bluetooth: hci3: command tx timeout
Bluetooth: hci3: command 0x0406 tx timeout