INFO: task kworker/1:9:8458 blocked for more than 143 seconds.
Not tainted 6.6.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:9 state:D stack:23184 pid:8458 ppid:2 flags:0x00004000
Workqueue: events console_callback
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xc79/0x30a0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143
___down_common kernel/locking/semaphore.c:225 [inline]
__down_common+0x327/0x6c0 kernel/locking/semaphore.c:246
down+0x74/0xa0 kernel/locking/semaphore.c:63
console_lock+0x96/0x150 kernel/printk/printk.c:2652
console_callback+0x63/0x4c0 drivers/tty/vt/vt.c:2933
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff87eac820
(rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
(rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
(rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
5 locks held by kworker/1:2/1879:
2 locks held by getty/2443:
#0: ffff88810b7470a0 (
&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
2 locks held by kworker/1:9/8458:
#0: ffff888100070d38
((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000d197d80 (console_work
){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
6 locks held by kworker/0:9/8857:
#0: ffff888109a71d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000e077d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888105fff190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:992 [inline]
, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff888109aa6500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff888109aa6500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff888109aa6500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff888109aa6500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff888109aa6500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822
#4: ffff88810373db68 (hcd->address0_mutex
){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
){+.+.}-{3:3}, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822
#5:
ffff8881f663b558
(&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline]
(&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
(&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1681 [inline]
(&rq->__lock){-.-.}-{2:2}, at: __schedule+0x290/0x30a0 kernel/sched/core.c:6612
6 locks held by kworker/0:13/9775:
#0: ffff888109a71d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90010ee7d80
((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2:
ffff888106376190
(&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:992 [inline]
, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff88811dc6a190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:992 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff88811c146160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff88811c146160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5:
ffff888106aca868 (hcd->bandwidth_mutex){+.+.}-{3:3}, at: usb_reset_configuration+0xff/0x710 drivers/usb/core/message.c:1707
4 locks held by kworker/0:14/9786:
8 locks held by kworker/1:10/17012:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x26c/0x2d0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13474 Comm: kworker/0:3 Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:write_comp_data+0x7/0x90 kernel/kcov.c:230
Code: 81 e2 00 01 ff 00 75 10 65 48 8b 04 25 00 ab 03 00 48 8b 80 30 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 b1 3d b6 7e <49> 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25
RSP: 0018:ffffc9000e70f2e0 EFLAGS: 00000293
RAX: 0000000000000001 RBX: 00000000000006ec RCX: ffffffff863f3540
RDX: 00000000000006ec RSI: 0000000005f5e0ff RDI: 0000000000000007
RBP: ffffc9000e70f3a8 R08: 0000000000000001 R09: 000000000000000a
R10: 000000000000000a R11: 0000000000d24e50 R12: 00000000000006ec
R13: 000000000000000a R14: ffffc9008e70f6f7 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff867f1f000 CR3: 000000013faa6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
put_dec+0x20/0xc0 lib/vsprintf.c:291
number+0x9a8/0xb80 lib/vsprintf.c:510
vsnprintf+0x905/0x1870 lib/vsprintf.c:2884
sprintf+0xcd/0x100 lib/vsprintf.c:3022
print_time kernel/printk/printk.c:1327 [inline]
info_print_prefix+0x258/0x350 kernel/printk/printk.c:1353
record_print_text+0x143/0x410 kernel/printk/printk.c:1402
printk_get_next_message+0x2ca/0x7c0 kernel/printk/printk.c:2842
console_emit_next_record kernel/printk/printk.c:2877 [inline]
console_flush_all+0x3c0/0xfb0 kernel/printk/printk.c:2966
console_unlock+0x10c/0x260 kernel/printk/printk.c:3035
vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2332
legacy_dvb_usb_read_remote_control+0x403/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:124
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304