INFO: task kworker/0:0:15620 blocked for more than 143 seconds.
Not tainted 6.6.0-rc1-syzkaller-00240-gf0b0d403eabb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D
stack:23040 pid:15620 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+0x27a/0x2c0 kernel/time/timer.c:2143
___down_common kernel/locking/semaphore.c:225 [inline]
__down_common+0x328/0x6c0 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+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 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:
5 locks held by kworker/0:1/9:
#0:
ffff88810a279538 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
#1:
ffffc9000009fd88
(
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
#2: ffff888106386190 (&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:
ffff888106399500 (&port_dev->status_lock
){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [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+0x28b4/0x4f30 drivers/usb/core/hub.c:5822
#4: ffff888103f96768 (hcd->address0_mutex){+.+.}-{3:3}
, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
, at: port_event drivers/usb/core/hub.c:5740 [inline]
, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822
1 lock held by khungtaskd/29:
#0: ffffffff87eac820
(
rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6607
2 locks held by getty/2441:
#0:
ffff888112d720a0
(&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
6 locks held by kworker/1:3/5259:
#0:
ffff888100070d38 (
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
#1: ffffc90001fcfd88 ((work_completion)(&intf->reset_ws)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
#2: ffff88811a68c190
(&dev->mutex
){....}-{3:3}
, at: device_trylock include/linux/device.h:1002 [inline]
, at: usb_lock_device_for_reset+0x184/0x330 drivers/usb/core/usb.c:898
#3: ffff8881063f1500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff8881063f1500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_reset_device+0x55a/0xad0 drivers/usb/core/hub.c:6218
#4: ffff88810475cf68
(hcd->address0_mutex){+.+.}-{3:3}, at: usb_reset_and_verify_device+0x2e3/0x10a0 drivers/usb/core/hub.c:6024
#5: ffffffff888e06b0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}
, at: hub_port_reset+0x1a4/0x1dc0 drivers/usb/core/hub.c:2953
7 locks held by kworker/1:8/12886:
2 locks held by kworker/0:0/15620:
#0:
ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
#1: ffffc900103f7d88 (console_work){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
7 locks held by kworker/1:9/21382:
4 locks held by kworker/1:11/21900:
#0: ffff88810a279538
(
(wq_completion)usb_hub_wq
){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
#1: ffffc9000eed7d88 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
#2:
ffff88810639e190 (&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: ffff8881063f1500
(&port_dev->status_lock
){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
){+.+.}-{3:3}, at: hub_event+0x5c4/0x4f30 drivers/usb/core/hub.c:5821
3 locks held by kworker/1:12/22604:
4 locks held by udevd/22948:
6 locks held by kworker/1:14/25245:
#0: ffff88810a279538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
#1: ffffc90001c1fd88
((work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
#2: ffff888105f4f190
(&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
(&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff888106302500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff888106302500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff888106302500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff888106302500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff888106302500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822
#4:
ffff8881043ec568 (hcd->address0_mutex){+.+.}-{3:3}
, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
, at: port_event drivers/usb/core/hub.c:5740 [inline]
, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822
#5: ffffffff888e06b0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}
, at: hub_port_reset+0x1a4/0x1dc0 drivers/usb/core/hub.c:2953
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-syzkaller-00240-gf0b0d403eabb #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+0xfac/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11086 Comm: kworker/1:7 Not tainted 6.6.0-rc1-syzkaller-00240-gf0b0d403eabb #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:task_h_load+0x3ed/0x650 kernel/sched/fair.c:9122
Code: 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 0f 85 8a 01 00 00 49 0f af 86 58 01 00 00 31 d2 48 83 c4 10 48 f7 f3 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 49 8d 86 68 01 00 00 4c 89 f3 49
RSP: 0018:ffffc90000198be0 EFLAGS: 00000082
RAX: 0000000000000186 RBX: 00000000000007f6 RCX: 1ffff110237a52ab
RDX: 000000000000074c RSI: ffffffff8687cba0 RDI: ffff88811bd29558
RBP: 0000000000000000 R08: ffffc90000198d24 R09: ffffed1020ce87bc
R10: ffff888106743de7 R11: fffffffffd87ddac R12: dffffc0000000000
R13: 00000001000328f9 R14: ffff88811bd29400 R15: ffff888106743a00
FS: 0000000000000000(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2568dff490 CR3: 000000011b7cc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
detach_tasks kernel/sched/fair.c:8832 [inline]
load_balance+0x1112/0x2ca0 kernel/sched/fair.c:11045
rebalance_domains+0x702/0xec0 kernel/sched/fair.c:11444
__do_softirq+0x20b/0x94e kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x8e/0xb0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1972 [inline]
RIP: 0010:vprintk_emit+0x3d1/0x630 kernel/printk/printk.c:2306
Code: 00 00 e8 c2 1b 1c 00 9c 8f 45 d0 48 8b 45 d0 31 ff 25 00 02 00 00 49 89 c7 48 89 c6 e8 38 17 1c 00 4d 85 ff 0f 85 09 02 00 00 0f 1e fa e8 96 1b 1c 00 45 31 c9 41 b8 01 00 00 00 31 c9 68 d1
RSP: 0018:ffffc9000210fac0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000017 RCX: 0000000000000000
RDX: ffff8881178bba00 RSI: ffffffff813156d4 RDI: 0000000000000007
RBP: ffffc9000210faf8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 65725f783032396d R12: 0000000000000200
R13: ffff888103665700 R14: 0000000000000000 R15: 0000000000000000
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2332
m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
m920x_rc_query+0x496/0x760 drivers/media/usb/dvb-usb/m920x.c:193
legacy_dvb_usb_read_remote_control+0x107/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 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