INFO: task kworker/u9:2:5868 blocked for more than 143 seconds.
Not tainted 6.15.0-next-20250530-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u9:2 state:D
stack:25560 pid:5868 tgid:5868 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: hci1 hci_rx_work
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
hci_connect_cfm include/net/bluetooth/hci_core.h:2047 [inline]
hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747
hci_event_func net/bluetooth/hci_event.c:7511 [inline]
hci_event_packet+0x7e0/0x1200 net/bluetooth/hci_event.c:7565
hci_rx_work+0x46a/0xe80 net/bluetooth/hci_core.c:4036
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5935 blocked for more than 144 seconds.
Not tainted 6.15.0-next-20250530-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:21960 pid:5935 tgid:5935 ppid:1 task_flags:0x40054c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:148
__flush_work+0x9b9/0xbc0 kernel/workqueue.c:4246
__cancel_work_sync+0xbe/0x110 kernel/workqueue.c:4366
hidp_session_remove+0x62/0x260 net/bluetooth/hidp/core.c:1169
l2cap_unregister_all_users net/bluetooth/l2cap_core.c:1748 [inline]
l2cap_conn_del+0x23a/0x680 net/bluetooth/l2cap_core.c:1777
hci_disconn_cfm include/net/bluetooth/hci_core.h:2065 [inline]
hci_conn_hash_flush+0x10d/0x230 net/bluetooth/hci_conn.c:2543
hci_dev_close_sync+0xaef/0x1330 net/bluetooth/hci_sync.c:5225
hci_dev_do_close net/bluetooth/hci_core.c:483 [inline]
hci_unregister_dev+0x206/0x500 net/bluetooth/hci_core.c:2678
vhci_release+0x80/0xd0 drivers/bluetooth/hci_vhci.c:665
__fput+0x44c/0xa70 fs/file_table.c:467
task_work_run+0x1d1/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x6ad/0x22e0 kernel/exit.c:955
do_group_exit+0x21c/0x2d0 kernel/exit.c:1104
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3148d8d5ca
RSP: 002b:00007fffb03523b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f3148d8d5ca
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fffb035240c R08: 00007fffb0351d0c R09: 00007fffb0352117
R10: 00007fffb0351d90 R11: 0000000000000293 R12: 0000000000000258
R13: 00000000000927c0 R14: 000000000001c678 R15: 00007fffb0352460
INFO: task khidpd_16c05505:5997 blocked for more than 146 seconds.
Not tainted 6.15.0-next-20250530-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khidpd_16c05505 state:D
stack:28224 pid:5997 tgid:5997 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
l2cap_unregister_user+0x6a/0x1b0 net/bluetooth/l2cap_core.c:1728
hidp_session_thread+0x3c9/0x410 net/bluetooth/hidp/core.c:1304
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.0.616:6653 blocked for more than 147 seconds.
Not tainted 6.15.0-next-20250530-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.616 state:D
stack:27240 pid:6653 tgid:6653 ppid:6636 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6956
l2cap_sock_connect+0x5c5/0x7a0 net/bluetooth/l2cap_sock.c:256
__sys_connect_file net/socket.c:2038 [inline]
__sys_connect+0x313/0x440 net/socket.c:2057
__do_sys_connect net/socket.c:2063 [inline]
__se_sys_connect net/socket.c:2060 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2060
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2a9ff8e969
RSP: 002b:00007ffd1e0cb158 EFLAGS: 00000246
ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f2aa01b5fa0 RCX: 00007f2a9ff8e969
RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007f2aa0010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2aa01b5fa0 R14: 00007f2aa01b5fa0 R15: 0000000000000003
Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
3 locks held by kworker/u8:1/13:
#0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3213 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1:
ffffc90000127bc0
(
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3214 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffffffff8f511d88 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:303
6 locks held by kworker/1:0/24:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
4 locks held by kworker/u9:0/51:
#0:
ffff88807aa95148
(
(wq_completion)hci4
#2
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3213 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1:
ffffc90000bc7bc0
(
(work_completion)(&hdev->rx_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3214 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffff88807d084078 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713
#3:
ffffffff8f679f28
(
hci_cb_list_lock
){+.+.}-{4:4}
, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2047 [inline]
, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747
4 locks held by kworker/u9:1/5154:
#0:
ffff888029f8a948
(
(wq_completion)hci3
#2
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3213 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1:
ffffc9000f1e7bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
ffffc9000f1e7bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2:
ffff888034dac078 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713
#3: ffffffff8f679f28 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2047 [inline]
#3: ffffffff8f679f28 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747
2 locks held by getty/5592:
#0: ffff888030fb90a0 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by kworker/u9:2/5868:
#0: ffff88807b123948 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88807b123948 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc9000432fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000432fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2:
ffff88805dbc8078 (&hdev->lock
){+.+.}-{4:4}
, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713
#3:
ffffffff8f679f28
(
hci_cb_list_lock
){+.+.}-{4:4}
, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2047 [inline]
, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747
5 locks held by syz-executor/5935:
#0:
ffff88806dad8d80
(
&hdev->req_lock
){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
){+.+.}-{4:4}, at: hci_unregister_dev+0x1fe/0x500 net/bluetooth/hci_core.c:2678
#1:
ffff88806dad8078
(
&hdev->lock
){+.+.}-{4:4}
, at: hci_dev_close_sync+0x66a/0x1330 net/bluetooth/hci_sync.c:5213
#2:
ffffffff8f679f28
(
hci_cb_list_lock
){+.+.}-{4:4}
, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2062 [inline]
, at: hci_conn_hash_flush+0xa1/0x230 net/bluetooth/hci_conn.c:2543
#3:
ffff8880279c6b38
(
&conn->lock
#2
){+.+.}-{4:4}, at: l2cap_conn_del+0x70/0x680 net/bluetooth/l2cap_core.c:1762
#4: ffffffff8f6a2db0 (
hidp_session_sem
){++++}-{4:4}
, at: hidp_session_remove+0x2c/0x260 net/bluetooth/hidp/core.c:1165
1 lock held by khidpd_16c05505/5997:
#0:
ffff88806dad8078
(
&hdev->lock
){+.+.}-{4:4}
, at: l2cap_unregister_user+0x6a/0x1b0 net/bluetooth/l2cap_core.c:1728
1 lock held by syz.0.616/6653: