INFO: task syz-executor.1:17760 blocked for more than 143 seconds.
Not tainted 6.2.0-rc7-syzkaller-00232-gf87b564686ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29184 pid:17760 ppid:2471 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xa20/0x27c0 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6741
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
sisusb_open+0xb6/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213
usb_open+0x208/0x2e0 drivers/usb/core/file.c:48
chrdev_open+0x26a/0x770 fs/char_dev.c:414
do_dentry_open+0x6c7/0x12a0 fs/open.c:882
do_open fs/namei.c:3557 [inline]
path_openat+0x1bbc/0x2a50 fs/namei.c:3714
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc2e0886284
RSP: 002b:00007fc2dfc25ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc2e09f4050 RCX: 00007fc2e0886284
RDX: 0000000000000002 RSI: 00007fc2dfc25d40 RDI: 00000000ffffff9c
RBP: 00007fc2dfc25d40 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffecb05241f R14: 00007fc2dfc26300 R15: 0000000000022000
</TASK>
INFO: task syz-executor.1:17761 blocked for more than 143 seconds.
Not tainted 6.2.0-rc7-syzkaller-00232-gf87b564686ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29008 pid:17761 ppid:2471 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xa20/0x27c0 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6741
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
sisusb_open+0xb6/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213
usb_open+0x208/0x2e0 drivers/usb/core/file.c:48
chrdev_open+0x26a/0x770 fs/char_dev.c:414
do_dentry_open+0x6c7/0x12a0 fs/open.c:882
do_open fs/namei.c:3557 [inline]
path_openat+0x1bbc/0x2a50 fs/namei.c:3714
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc2e0886284
RSP: 002b:00007fc2dfc04ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc2e09f4120 RCX: 00007fc2e0886284
RDX: 0000000000000002 RSI: 00007fc2dfc04d40 RDI: 00000000ffffff9c
RBP: 00007fc2dfc04d40 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffecb05241f R14: 00007fc2dfc05300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/11:
#0: ffffffff87a97310 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/25:
#0: ffffffff87a97e60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
6 locks held by kworker/0:2/701:
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc900023afda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffff88810eb82190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#2: ffff88810eb82190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4810 drivers/usb/core/hub.c:5739
#3: ffff88810eb854f0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3147 [inline]
#3: ffff88810eb854f0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5303 [inline]
#3: ffff88810eb854f0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
#3: ffff88810eb854f0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5711 [inline]
#3: ffff88810eb854f0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x277c/0x4810 drivers/usb/core/hub.c:5793
#4: ffff88810e363f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5304 [inline]
#4: ffff88810e363f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
#4: ffff88810e363f68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5711 [inline]
#4: ffff88810e363f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x27b1/0x4810 drivers/usb/core/hub.c:5793
#5: ffffffff87a97e60 (rcu_read_lock){....}-{1:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:537 [inline]
#5: ffffffff87a97e60 (rcu_read_lock){....}-{1:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1358 [inline]
#5: ffffffff87a97e60 (rcu_read_lock){....}-{1:2}, at: rq_lock kernel/sched/sched.h:1648 [inline]
#5: ffffffff87a97e60 (rcu_read_lock){....}-{1:2}, at: __schedule+0x24a/0x27c0 kernel/sched/core.c:6523
2 locks held by getty/2407:
#0: ffff888100223098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
6 locks held by kworker/0:3/5276:
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90001fafda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffff88810ec1a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#2: ffff88810ec1a190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4810 drivers/usb/core/hub.c:5739
#3: ffff88813c561190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#3: ffff88813c561190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff88813c566118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#4: ffff88813c566118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19c/0x7e0 drivers/usb/core/file.c:156
8 locks held by kworker/0:4/5283:
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109017d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90001fefda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffff88810ec92190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#2: ffff88810ec92190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4810 drivers/usb/core/hub.c:5739
#3: ffff888109310190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#3: ffff888109310190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2229
#4: ffff88811b30f118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#4: ffff88811b30f118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline]
#4: ffff88811b30f118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x700 drivers/base/dd.c:1276
#5: ffff88813c4d5a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
#5: ffff88813c4d5a20 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline]
#5: ffff88813c4d5a20 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x700 drivers/base/dd.c:1276
#6: ffffffff885dd168 (input_mutex){+.+.}-{3:3}, at: __input_unregister_device+0x136/0x450 drivers/input/input.c:2220
#7: ffffffff87aa1ff8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#7: ffffffff87aa1ff8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x5df/0x780 kernel/rcu/tree_exp.h:946
2 locks held by kworker/0:7/5420:
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc900023efda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
2 locks held by syz-executor.1/17751:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
#1: ffff88811618b0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb6/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213
2 locks held by syz-executor.1/17760:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
#1: ffff88811618b0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb6/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213
2 locks held by syz-executor.1/17761:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
#1: ffff88811618b0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb6/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213
1 lock held by syz-executor.3/18266:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.3/18270:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.1/19220:
#0: ffffffff88427e90 (minor_rwsem){++++}-{3:3}, at: usb_open+0x28/0x2e0 drivers/usb/core/file.c:39
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 25 Comm: khungtaskd Not tainted 6.2.0-rc7-syzkaller-00232-gf87b564686ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
<TASK>
__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+0x2ee/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570