INFO: task hung in hci_remote_features

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: task hung in hci_remote_features_evt	1				3	296d	302d	0/3	auto-obsoleted due to no activity on 2025/02/14 05:43
upstream	INFO: task hung in hci_remote_features_evt (2) bluetooth	1	syz	error	inconclusive	8	63d	114d	0/29	upstream: reported syz repro on 2025/05/07 00:51
upstream	INFO: task hung in hci_remote_features_evt bluetooth	1				9	324d	420d	0/29	auto-obsoleted due to no activity on 2025/01/07 02:12

INFO: task kworker/u5:6:4265 blocked for more than 142 seconds. Not tainted 6.1.119-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:6 state:D stack:25952 pid:4265 ppid:2 flags:0x00004000 Workqueue: hci14 hci_rx_work Call Trace: <TASK> context_switch kernel/sched/core.c:5241 [inline] __schedule+0x143f/0x4570 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747 hci_connect_cfm include/net/bluetooth/hci_core.h:1784 [inline] hci_remote_features_evt+0x615/0xa60 net/bluetooth/hci_event.c:3803 hci_event_func net/bluetooth/hci_event.c:7373 [inline] hci_event_packet+0xa9d/0x1510 net/bluetooth/hci_event.c:7425 hci_rx_work+0x3cd/0xce0 net/bluetooth/hci_core.c:4085 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> INFO: task kworker/u5:8:4267 blocked for more than 142 seconds. Not tainted 6.1.119-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:8 state:D stack:26624 pid:4267 ppid:2 flags:0x00004000 Workqueue: hci13 hci_rx_work Call Trace: <TASK> context_switch kernel/sched/core.c:5241 [inline] __schedule+0x143f/0x4570 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747 hci_connect_cfm include/net/bluetooth/hci_core.h:1784 [inline] hci_remote_features_evt+0x615/0xa60 net/bluetooth/hci_event.c:3803 hci_event_func net/bluetooth/hci_event.c:7373 [inline] hci_event_packet+0xa9d/0x1510 net/bluetooth/hci_event.c:7425 hci_rx_work+0x3cd/0xce0 net/bluetooth/hci_core.c:4085 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> INFO: task kworker/0:9:4789 blocked for more than 147 seconds. Not tainted 6.1.119-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:9 state:D stack:25256 pid:4789 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: <TASK> context_switch kernel/sched/core.c:5241 [inline] __schedule+0x143f/0x4570 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747 addrconf_verify_work+0x15/0x30 net/ipv6/addrconf.c:4656 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> Showing all locks held in the system:

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/11/29 20:57	linux-6.1.y	e4d90d63d385	5df23865	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	INFO: task hung in hci_remote_features_evt

Crashes (1):

Assets (help?)