INFO: task kworker/1:5:5243 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/1:5 state:D stack:22256 pid:5243 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:
5 locks held by kworker/0:1/9:
4 locks held by kworker/1:0/22:
#0: ffff88810a271d38
((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000017fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2:
ffff8881063cf190
(&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff8881405cb190
(&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
(&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x890 drivers/usb/core/hub.c:2243
1 lock held by khungtaskd/29:
#0: ffffffff87eac820
(rcu_read_lock
){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/2442:
#0: ffff8881132d80a0 (&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/1:5/5243:
#0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000208fd80 (console_work
){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
3 locks held by kworker/0:5/9009:
3 locks held by kworker/1:10/12783:
3 locks held by kworker/0:10/13241:
#0: ffff88810a271d38 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000ebafd80
((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888105f76190
(&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
6 locks held by kworker/0:11/13293:
#0: ffff88810a271d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000ef97d80
(
(work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff88810638d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff88810638d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff8881063aa500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff8881063aa500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff8881063aa500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff8881063aa500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff8881063aa500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822
#4: ffff888102bc7a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
#4: ffff888102bc7a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#4: ffff888102bc7a68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#4: ffff888102bc7a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822
#5: ffffffff888e09f0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}
, at: hub_port_reset+0x1a4/0x1dc0 drivers/usb/core/hub.c:2953
5 locks held by kworker/0:14/18122:
4 locks held by udevd/18565:
#0: ffff88810f35a668
(
&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
#1: ffff888111f8c088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
#2: ffff888106f8d578 (kn->active
#29){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
#3: ffff8881405cb190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
#3: ffff8881405cb190 (&dev->mutex){....}-{3:3}, at: serial_show+0x26/0xa0 drivers/usb/core/sysfs.c:143
5 locks held by kworker/0:15/18574:
#0: ffff88810a271d38 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1:
ffffc9000fb07d80
((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff88810632d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff88810632d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
#3: ffff888106388500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff888106388500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff888106388500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff888106388500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff888106388500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822
#4:
ffffffff8c04cfa0 (&obj_hash[i].lock){-.-.}-{2:2}
, at: debug_object_activate+0x1a0/0x490 lib/debugobjects.c:717
2 locks held by syz-executor.2/20990:
1 lock held by syz-executor.3/20989:
#0: ffffffff87eb80f8 (rcu_state.exp_mutex){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992
=============================================
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: 18574 Comm: kworker/0:15 Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:207
Code: 81 e1 00 01 00 00 65 48 8b 14 25 00 ab 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b 82 18 15 00 00 <83> f8 02 75 20 48 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 48
RSP: 0018:ffffc9000fb06c60 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffc9000fb07049 RCX: 0000000000000000
RDX: ffff888133858000 RSI: ffffffff863f3b74 RDI: 0000000000000005
RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000d21fa8 R12: ffffc9000fb07049
R13: 0000000000000000 R14: ffffc9008fb07047 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9012661070 CR3: 0000000102e86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
number+0x594/0xb80 lib/vsprintf.c:522
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
dev_vprintk_emit drivers/base/core.c:4849 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4860
__dev_printk+0xf5/0x270 drivers/base/core.c:4872
_dev_notice+0xe5/0x120 drivers/base/core.c:4917
usb_get_configuration+0x3c8b/0x5640 drivers/usb/core/config.c:937
usb_enumerate_device drivers/usb/core/hub.c:2421 [inline]
usb_new_device+0x1115/0x1960 drivers/usb/core/hub.c:2559
hub_port_connect drivers/usb/core/hub.c:5440 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
port_event drivers/usb/core/hub.c:5740 [inline]
hub_event+0x2e62/0x4f30 drivers/usb/core/hub.c:5822
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