===================================== WARNING: bad unlock balance detected! 6.3.0-rc7-syzkaller-g327bf9bb94cf #0 Not tainted ------------------------------------- kworker/u5:2/6025 is trying to release lock (&conn->chan_lock) at: [] l2cap_disconnect_rsp+0x210/0x30c net/bluetooth/l2cap_core.c:4697 but there are no more locks to release! other info that might help us debug this: 2 locks held by kworker/u5:2/6025: #0: ffff0000d2f90938 ((wq_completion)hci2#2){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363 #1: ffff80001e467c20 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365 stack backtrace: CPU: 1 PID: 6025 Comm: kworker/u5:2 Not tainted 6.3.0-rc7-syzkaller-g327bf9bb94cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: hci2 hci_rx_work Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_unlock_imbalance_bug+0x250/0x2a4 kernel/locking/lockdep.c:5109 lock_release+0x4ac/0x9ac kernel/locking/lockdep.c:5689 __mutex_unlock_slowpath+0xe0/0x6b4 kernel/locking/mutex.c:907 mutex_unlock+0x18/0x24 kernel/locking/mutex.c:543 l2cap_disconnect_rsp+0x210/0x30c net/bluetooth/l2cap_core.c:4697 l2cap_bredr_sig_cmd+0x974/0x7e94 net/bluetooth/l2cap_core.c:5748 l2cap_sig_channel net/bluetooth/l2cap_core.c:6507 [inline] l2cap_recv_frame+0x83c/0x6a14 net/bluetooth/l2cap_core.c:7786 l2cap_recv_acldata+0x4f4/0x163c net/bluetooth/l2cap_core.c:8504 hci_acldata_packet net/bluetooth/hci_core.c:3828 [inline] hci_rx_work+0x2cc/0x8b8 net/bluetooth/hci_core.c:4063 process_one_work+0x788/0x12d4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x00 Bluetooth: Wrong link type (-22) Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x00 Bluetooth: Wrong link type (-22) Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0xf1 Bluetooth: Wrong link type (-22) Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0xf1 Bluetooth: Wrong link type (-22) Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: SCO packet for unknown connection handle 0 Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci0: link tx timeout Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: ACL packet for unknown connection handle 402 Bluetooth: hci0: SCO packet for unknown connection handle 0 Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci2: link tx timeout Bluetooth: hci2: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x45 Bluetooth: Wrong link type (-22) Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: Unknown BR/EDR signaling command 0x45 Bluetooth: Wrong link type (-22) Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: command 0x0409 tx timeout Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: SCO packet for unknown connection handle 400 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: SCO packet for unknown connection handle 0 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci5: SCO packet for unknown connection handle 0 Bluetooth: hci5: link tx timeout Bluetooth: hci5: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci3: link tx timeout Bluetooth: hci3: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci4: link tx timeout Bluetooth: hci4: killing stalled connection 11:aa:aa:aa:aa:aa