Warning: Permanently added '10.128.0.219' (ECDSA) to the list of known hosts. [ 31.442926][ T48] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 31.445746][ T5929] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 31.448074][ T5929] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 31.450694][ T5929] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 31.452796][ T5929] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 31.455503][ T5929] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 executing program [ 31.490055][ T5929] [ 31.490674][ T5929] ===================================== [ 31.491991][ T5929] WARNING: bad unlock balance detected! [ 31.493341][ T5929] 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted [ 31.494846][ T5929] ------------------------------------- [ 31.496164][ T5929] kworker/u5:2/5929 is trying to release lock (&conn->chan_lock) at: [ 31.498131][ T5929] [] l2cap_disconnect_rsp+0x210/0x30c [ 31.499908][ T5929] but there are no more locks to release! [ 31.501316][ T5929] [ 31.501316][ T5929] other info that might help us debug this: [ 31.503234][ T5929] 2 locks held by kworker/u5:2/5929: [ 31.504481][ T5929] #0: ffff0000db5a5938 ((wq_completion)hci0#2){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 [ 31.507005][ T5929] #1: ffff80001e507c20 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 [ 31.509696][ T5929] [ 31.509696][ T5929] stack backtrace: [ 31.511101][ T5929] CPU: 1 PID: 5929 Comm: kworker/u5:2 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 [ 31.513389][ T5929] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 [ 31.515871][ T5929] Workqueue: hci0 hci_rx_work [ 31.517019][ T5929] Call trace: [ 31.517808][ T5929] dump_backtrace+0x1b8/0x1e4 [ 31.519098][ T5929] show_stack+0x2c/0x44 [ 31.520078][ T5929] dump_stack_lvl+0xd0/0x124 [ 31.521180][ T5929] dump_stack+0x1c/0x28 [ 31.522111][ T5929] print_unlock_imbalance_bug+0x250/0x2a4 [ 31.523514][ T5929] lock_release+0x4ac/0x9ac [ 31.524580][ T5929] __mutex_unlock_slowpath+0xe0/0x6b4 [ 31.525841][ T5929] mutex_unlock+0x18/0x24 [ 31.526870][ T5929] l2cap_disconnect_rsp+0x210/0x30c [ 31.528087][ T5929] l2cap_bredr_sig_cmd+0x974/0x7e94 [ 31.529332][ T5929] l2cap_recv_frame+0x83c/0x6a14 [ 31.530618][ T5929] l2cap_recv_acldata+0x4f4/0x163c [ 31.531875][ T5929] hci_rx_work+0x2cc/0x8b8 [ 31.533075][ T5929] process_one_work+0x788/0x12d4 [ 31.534307][ T5929] worker_thread+0x8e0/0xfe8 [ 31.535361][ T5929] kthread+0x250/0x2d8 [ 31.536401][ T5929] ret_from_fork+0x10/0x20