INFO: task syz-executor.2:28734 blocked for more than 143 seconds.
Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27480 pid:28734 ppid:5124 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6555
schedule+0xde/0x1b0 kernel/sched/core.c:6631
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
io_wq_exit_workers io_uring/io-wq.c:1253 [inline]
io_wq_put_and_exit+0x247/0xe30 io_uring/io-wq.c:1288
io_uring_clean_tctx+0x117/0x178 io_uring/tctx.c:193
io_uring_cancel_generic+0x5ae/0x606 io_uring/io_uring.c:3140
io_uring_files_cancel include/linux/io_uring.h:55 [inline]
do_exit+0x522/0x2950 kernel/exit.c:822
do_group_exit+0xd4/0x2a0 kernel/exit.c:1012
get_signal+0x21c3/0x2450 kernel/signal.c:2859
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1090c8c0c9
RSP: 002b:00007f1091a34168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f1090dabf80 RCX: 00007f1090c8c0c9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f1090ce7ae9 R08: 0000000000000000 R09: 000000001e000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1090ecfb1f R14: 00007f1091a34300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c790f30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c790c30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8c791a80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by getty/4749:
#0: ffff888028309098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.0/5108:
3 locks held by kworker/u4:8/27835:
6 locks held by kworker/1:6/1958:
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88814526f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90015427da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffff888146fff190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#2: ffff888146fff190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4810 drivers/usb/core/hub.c:5737
#3: ffff888090df7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#3: ffff888090df7190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff888021daf118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#4: ffff888021daf118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffffffff8e033688 (register_mutex#6){+.+.}-{3:3}, at: usb_audio_probe+0x357/0x2fe0 sound/usb/card.c:800
3 locks held by kworker/u4:16/25543:
1 lock held by iou-wrk-28734/28742:
3 locks held by udevd/28840:
#0: ffff888030d1b888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline]
#0: ffff888030d1b888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18e/0x790 fs/kernfs/file.c:280
#1: ffff88808bd46490 (kn->active#27){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline]
#1: ffff88808bd46490 (kn->active#27){++++}-{0:0}, at: kernfs_fop_read_iter+0x1b1/0x790 fs/kernfs/file.c:280
#2: ffff888090df7190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline]
#2: ffff888090df7190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x40/0x2c0 drivers/usb/core/sysfs.c:874
5 locks held by syz-executor.3/31702:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570