Bluetooth: hci1: link tx timeout
Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 3650, name: kworker/u5:4
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
3 locks held by kworker/u5:4/3650:
 #0: ffff8880631bb938 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc9000404fd20 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: hci_link_tx_to net/bluetooth/hci_core.c:3415 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: __check_timeout+0x181/0x460 net/bluetooth/hci_core.c:3568
CPU: 0 PID: 3650 Comm: kworker/u5:4 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: hci1 hci_tx_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:9955
 __mutex_lock_common kernel/locking/mutex.c:580 [inline]
 __mutex_lock+0xbd/0xd80 kernel/locking/mutex.c:747
 hci_cmd_sync_submit+0x3b/0x2e0 net/bluetooth/hci_sync.c:715
 hci_disconnect+0xe6/0x2c0 net/bluetooth/hci_conn.c:255
 hci_link_tx_to net/bluetooth/hci_core.c:3422 [inline]
 __check_timeout+0x333/0x460 net/bluetooth/hci_core.c:3568
 hci_sched_le net/bluetooth/hci_core.c:3751 [inline]
 hci_tx_work+0x138b/0x1ec0 net/bluetooth/hci_core.c:3829
 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>

=============================
[ BUG: Invalid wait context ]
6.1.106-syzkaller #0 Tainted: G        W         
-----------------------------
kworker/u5:4/3650 is trying to lock:
ffff888061aac9b0 (&hdev->unregister_lock){+.+.}-{3:3}, at: hci_cmd_sync_submit+0x3b/0x2e0 net/bluetooth/hci_sync.c:715
other info that might help us debug this:
context-{4:4}
3 locks held by kworker/u5:4/3650:
 #0: ffff8880631bb938 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc9000404fd20 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: hci_link_tx_to net/bluetooth/hci_core.c:3415 [inline]
 #2: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: __check_timeout+0x181/0x460 net/bluetooth/hci_core.c:3568
stack backtrace:
CPU: 0 PID: 3650 Comm: kworker/u5:4 Tainted: G        W          6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: hci1 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:715
 hci_disconnect+0xe6/0x2c0 net/bluetooth/hci_conn.c:255
 hci_link_tx_to net/bluetooth/hci_core.c:3422 [inline]
 __check_timeout+0x333/0x460 net/bluetooth/hci_core.c:3568
 hci_sched_le net/bluetooth/hci_core.c:3751 [inline]
 hci_tx_work+0x138b/0x1ec0 net/bluetooth/hci_core.c:3829
 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>