INFO: task kworker/0:7:22236 blocked for more than 143 seconds.
Not tainted 6.6.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7 state:D
stack:23184 pid:22236 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
2 locks held by getty/2443:
#0: ffff8881037870a0 (&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
3 locks held by kworker/0:4/5319:
#0:
ffff888109e46d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90002237d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888106390190 (
&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
4 locks held by kworker/0:8/5589:
5 locks held by kworker/1:9/5690:
3 locks held by kworker/0:10/6631:
#0: ffff888109e46d38 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000ffdfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff8881063a8190
(
&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 locks held by kworker/1:3/8803:
2 locks held by kworker/0:7/22236:
#0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90007547d80
(
console_work){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
4 locks held by udevd/23845:
#0: ffff888119690b08
(&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
#1: ffff8881149dec88
(&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
#2:
ffff888114a54e88
(
kn->active#25
){++++}-{0:0}
, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
#3: ffff88811c970190
(&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
(&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
5 locks held by kworker/0:9/25985:
3 locks held by kworker/1:12/29583:
4 locks held by kworker/0:13/30172:
3 locks held by kworker/0:16/578:
#0: ffff888100070d38 (
(wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90002277d80
((work_completion)(&fw_work->work)
){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888105f98190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105f98190 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1163 [inline]
#2: ffff888105f98190 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_cb+0x3b1/0x620 drivers/net/wireless/ath/ath9k/hif_usb.c:1296
1 lock held by syz-executor.5/1307:
#0: ffff8881f663b558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline]
#0: ffff8881f663b558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
#0: ffff8881f663b558 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1681 [inline]
#0: ffff8881f663b558 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x290/0x30a0 kernel/sched/core.c:6612
3 locks held by dhcpcd-run-hook/1337:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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: 530 Comm: kworker/0:1 Not tainted 6.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:418
Code: dc c8 fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 3c 52 15 ff eb a6 e8 95 52 15 ff eb e3
RSP: 0018:ffffc9000278f748 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82849500 RDI: ffffffff8c156ee0
RBP: ffffffff8c156ea0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d393133355420 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff182ae2e R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f210fa77dc0 CR3: 000000010c31a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:117 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
wait_for_lsr+0xd7/0x180 drivers/tty/serial/8250/8250_port.c:2086
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3371 [inline]
serial8250_console_write+0xce5/0x1060 drivers/tty/serial/8250/8250_port.c:3449
console_emit_next_record kernel/printk/printk.c:2910 [inline]
console_flush_all+0x4eb/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
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+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