INFO: task kworker/0:13:23058 blocked for more than 143 seconds.
Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:13 state:D
stack:24080 pid:23058 tgid:23058 ppid:2 flags:0x00004000
Workqueue: events console_callback
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x1042/0x34b0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
___down_common+0x2d7/0x460 kernel/locking/semaphore.c:225
__down_common kernel/locking/semaphore.c:246 [inline]
__down+0x20/0x30 kernel/locking/semaphore.c:254
down+0x74/0xa0 kernel/locking/semaphore.c:63
console_lock+0x5b/0xa0 kernel/printk/printk.c:2808
console_callback+0x63/0x4c0 drivers/tty/vt/vt.c:3120
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
4 locks held by kworker/0:0/8:
5 locks held by kworker/1:0/24:
#0:
ffff888106ab4148
(
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000019fd80
((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff88810abe8190
(&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
(&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
#3:
ffff88813eafc190
(
&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff888125e93160 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
1 lock held by khungtaskd/30:
#0: ffffffff88ebb140
(rcu_read_lock){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
2 locks held by getty/2921:
#0: ffff888108ee40a0 (&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+0xfba/0x1480 drivers/tty/n_tty.c:2211
4 locks held by udevd/14291:
#0: ffff8881370a0b08 (&p->lock){+.+.}-{3:3}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1:
ffff888135950088 (&of->mutex
#2){+.+.}-{3:3}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2:
ffff88810df0f698 (kn->active#5){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff88813eafc190 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2736
3 locks held by kworker/0:8/15526:
#0: ffff888106ab4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}
, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90001cffd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff88810ab78190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff88810ab78190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
4 locks held by kworker/0:12/21694:
2 locks held by kworker/0:13/23058:
#0: ffff888100080948 ((wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90007dc7d80 (console_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
3 locks held by kworker/1:5/23930:
2 locks held by kworker/u8:3/27023:
#0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90002ca7d80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
4 locks held by kworker/0:14/29098:
1 lock held by modprobe/31454:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline]
RIP: 0010:raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline]
RIP: 0010:raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline]
RIP: 0010:desc_read+0xef/0x350 kernel/printk/printk_ringbuffer.c:447
Code: 4b 8d 14 7f be 08 00 00 00 48 8d 1c d0 48 89 df e8 26 7e 77 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 23 02 00 00 48 b8 ff ff ff ff ff ff ff 3f 4c 8b 3b 48 89 ef
RSP: 0018:ffffc9000008f050 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffffff88e80a70 RCX: ffffffff8137060a
RDX: 1ffffffff11d014e RSI: 0000000000000008 RDI: ffffffff88e80a70
RBP: 000000010007658a R08: 0000000000000000 R09: fffffbfff11d014e
R10: ffffffff88e80a77 R11: 39312d203a726f72 R12: ffffc9000008f200
R13: ffffc9000008f0b8 R14: ffffffff88de6cd0 R15: 000000000000058a
FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9889ddef98 CR3: 0000000117240000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
desc_read_finalized_seq+0x8a/0x1d0 kernel/printk/printk_ringbuffer.c:1874
prb_read kernel/printk/printk_ringbuffer.c:1942 [inline]
_prb_read_valid+0x49f/0x7e0 kernel/printk/printk_ringbuffer.c:2113
prb_read_valid+0x79/0xb0 kernel/printk/printk_ringbuffer.c:2182
printk_get_next_message+0x158/0x670 kernel/printk/printk.c:2963
console_emit_next_record kernel/printk/printk.c:3046 [inline]
console_flush_all+0x6ec/0xc60 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3279
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407
dev_vprintk_emit drivers/base/core.c:4942 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4953
__dev_printk+0xf5/0x270 drivers/base/core.c:4965
_dev_err+0xe5/0x120 drivers/base/core.c:5008
hub_port_init+0x7eb/0x3ab0 drivers/usb/core/hub.c:5021
hub_port_connect drivers/usb/core/hub.c:5450 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x2c16/0x4f40 drivers/usb/core/hub.c:5903
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244