INFO: task kworker/0:2:1123 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D
stack:21176 pid:1123 tgid:1123 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
usb_disconnect+0x4a7/0x9e0 drivers/usb/core/hub.c:2354
hub_port_connect drivers/usb/core/hub.c:5407 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x1b50/0x5420 drivers/usb/core/hub.c:5953
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
INFO: task kworker/1:8:9299 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8 state:D stack:22040 pid:9299 tgid:9299 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
kernfs_create_dir_ns+0xfc/0x1a0 fs/kernfs/dir.c:1096
sysfs_create_dir_ns+0x13a/0x2b0 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x2c4/0x9d0 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_add+0x16e/0x240 lib/kobject.c:426
device_add+0x288/0x1980 drivers/base/core.c:3627
usb_set_configuration+0x1187/0x1e50 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x241/0xb20 drivers/base/dd.c:659
__driver_probe_device+0x1de/0x470 drivers/base/dd.c:801
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
__device_attach_driver+0x1df/0x350 drivers/base/dd.c:959
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031
device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086
bus_probe_device+0x64/0x150 drivers/base/bus.c:574
device_add+0x116e/0x1980 drivers/base/core.c:3689
usb_new_device+0xd07/0x1a90 drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x31bf/0x5420 drivers/usb/core/hub.c:5953
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
INFO: task syz.3.2204:13379 blocked for more than 144 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2204 state:D
stack:26696 pid:13379 tgid:13379 ppid:2975 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:642 [inline]
bus_remove_driver+0x24d/0x2e0 drivers/base/bus.c:780
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x80/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4bb/0x570 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1349682005
RSP: 002b:00007ffe72348290 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00007f13498a5fa0 RCX: 00007f1349682005
RDX: 00007ffe723482d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f13498a7da0 R08: 0000000000000000 R09: 00007f13494b8000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000115649
R13: 00007f13498a6090 R14: ffffffffffffffff R15: 00007ffe72348410
INFO: task syz.0.2205:13392 blocked for more than 144 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2205 state:D
stack:27704 pid:13392 tgid:13384 ppid:2970 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:642 [inline]
bus_remove_driver+0x24d/0x2e0 drivers/base/bus.c:780
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x80/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4bb/0x570 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd23c922005
RSP: 002b:00007fd23b32dfa0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00000000ffffffff RCX: 00007fd23c922005
RDX: 00007fd23b32dfe0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fd23c973f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fd23cb46128 R14: 00007fd23cb46090 R15: 00007ffcbfd38c68
INFO: task syz.2.2207:13387 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2207 state:D
stack:29248 pid:13387 tgid:13386 ppid:2971 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
kernfs_create_dir_ns+0xfc/0x1a0 fs/kernfs/dir.c:1096
sysfs_create_dir_ns+0x13a/0x2b0 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x2c4/0x9d0 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_init_and_add+0x11b/0x190 lib/kobject.c:457
bus_add_driver+0x186/0x6c0 drivers/base/bus.c:708
driver_register+0x15c/0x4b0 drivers/base/driver.c:249
usb_gadget_register_driver_owner+0x132/0x330 drivers/usb/gadget/udc/core.c:1719
raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:596 [inline]
raw_ioctl+0x17ec/0x2e60 drivers/usb/gadget/legacy/raw_gadget.c:1307
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x570 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faefa15f34b
RSP: 002b:00007faef8bc4f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007faefa15f34b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007faef8bc5fe0 R08: 0000000000000000 R09: 00322e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faef8bc4fb0 R14: 0000200000000000 R15: 00007faefa4e0b88
INFO: task syz.1.2206:13389 blocked for more than 145 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2206 state:D
stack:27704 pid:13389 tgid:13388 ppid:2966 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:642 [inline]
bus_remove_driver+0x24d/0x2e0 drivers/base/bus.c:780
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x80/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4bb/0x570 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f676774f34b
RSP: 002b:00007f67661acf10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f676774f34b
RDX: 00007f67661adfe0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007f67661adfe0 R08: 0000000000000000 R09: 00312e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000200000001c80 R15: 00007f67677df52a
INFO: task syz.4.2208:13391 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2208 state:D
stack:29384 pid:13391 tgid:13390 ppid:2967 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
kernfs_create_dir_ns+0xfc/0x1a0 fs/kernfs/dir.c:1096
sysfs_create_dir_ns+0x13a/0x2b0 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x2c4/0x9d0 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_init_and_add+0x11b/0x190 lib/kobject.c:457
bus_add_driver+0x186/0x6c0 drivers/base/bus.c:708
driver_register+0x15c/0x4b0 drivers/base/driver.c:249
usb_gadget_register_driver_owner+0x132/0x330 drivers/usb/gadget/udc/core.c:1719
raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:596 [inline]
raw_ioctl+0x17ec/0x2e60 drivers/usb/gadget/legacy/raw_gadget.c:1307
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x570 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83ad96f34b
RSP: 002b:00007f83ac3d4f10 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f83ad96f34b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003
RBP: 00007f83ac3d5fe0 R08: 0000000000000000 R09: 00342e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83ac3d4fb0 R14: 0000200000000040 R15: 00007f83adcf0320
Showing all locks held in the system:
7 locks held by kworker/0:0/9:
5 locks held by kworker/0:1/10:
2 locks held by kworker/R-mm_pe/13:
1 lock held by khungtaskd/30:
#0: ffffffff892cd6e0 (
rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
5 locks held by kworker/0:2/1123:
2 locks held by getty/2921:
#0: ffff88810773e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x1510 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/2966:
#0:
ffff888100ac5988
(&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
1 lock held by syz-executor/2967:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
1 lock held by syz-executor/2970:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
1 lock held by syz-executor/2971:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
1 lock held by syz-executor/2975:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
4 locks held by kworker/1:2/5223:
#0: ffff888100071948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc9000222fca0 (kernfs_notify_work){+.+.}-{0:0}, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffff888100ac5ab8 (&root->kernfs_supers_rwsem){++++}-{4:4}
, at: kernfs_notify_workfn+0xf7/0xb30 fs/kernfs/file.c:932
#3: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_notify_workfn+0xff/0xb30 fs/kernfs/file.c:933
5 locks held by kworker/1:8/9299:
#0: ffff888105af4548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc900127afca0 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2: ffff88810a369198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#2: ffff88810a369198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1be/0x5420 drivers/usb/core/hub.c:5899
#3: ffff8881404ce198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#3: ffff8881404ce198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4e0 drivers/base/dd.c:1006
#4:
ffff888100ac5988
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
2 locks held by kworker/0:9/11120:
5 locks held by kworker/0:11/12319:
#0: ffff888105af4548 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc9000212fca0
((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2: ffff88810a739198 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:895 [inline]
, at: hub_event+0x1be/0x5420 drivers/usb/core/hub.c:5899
#3: ffff888105ef4278
(&(&priv->bus_notifier)->rwsem){++++}-{4:4}
, at: blocking_notifier_call_chain kernel/notifier.c:379 [inline]
, at: blocking_notifier_call_chain+0x53/0xa0 kernel/notifier.c:368
#4: ffff888100ac5988 (&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_activate fs/kernfs/dir.c:1428 [inline]
, at: kernfs_add_one+0x349/0x840 fs/kernfs/dir.c:837
3 locks held by kworker/0:12/12633:
1 lock held by syz.3.2204/13379:
#0:
ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
1 lock held by syz.0.2205/13392:
#0: ffff888100ac5988
(&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
1 lock held by syz.2.2207/13387:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
1 lock held by syz.1.2206/13389:
#0: ffff888100ac5988
(&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
1 lock held by syz.4.2208/13391:
#0: ffff888100ac5988 (
&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
1 lock held by syz-executor/13393:
#0: ffff888100ac5988 (&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13394:
#0: ffff888100ac5988 (
&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13395:
#0:
ffff888100ac5988
(&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13396:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13397:
#0:
ffff888100ac5988
(&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x133/0x180 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xe66/0x1180 kernel/hung_task.c:515
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events dvb_usb_read_remote_control
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x11/0x90 kernel/kcov.c:246
Code: cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 77 da 22 0b <65> 8b 05 88 da 22 0b a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00
RSP: 0018:ffffc90000007068 EFLAGS: 00000046
RAX: 0000000000000006 RBX: 0000000000000025 RCX: ffffffff87538b7b
RDX: ffff888101ab0000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000007110 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000025 R11: 0000000000763808 R12: ffffffff876999c1
R13: ffffc90000007190 R14: ffffffff876999c0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888268bf4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd23c8d2a60 CR3: 00000000090a6000 CR4: 00000000003506f0
Call Trace:
format_decode+0x16b/0xd00 lib/vsprintf.c:2691
vsnprintf+0x156/0x11e0 lib/vsprintf.c:2889
sprintf+0xcc/0x100 lib/vsprintf.c:3110
print_caller kernel/printk/printk.c:1368 [inline]
info_print_prefix+0x146/0x350 kernel/printk/printk.c:1385
record_print_text+0x140/0x400 kernel/printk/printk.c:1432
printk_get_next_message+0x2d1/0x6d0 kernel/printk/printk.c:3018
console_emit_next_record kernel/printk/printk.c:3083 [inline]
console_flush_one_record+0x684/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
dev_vprintk_emit drivers/base/core.c:4914 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
__dev_printk+0xf5/0x270 drivers/base/core.c:4937
_dev_err+0xe4/0x120 drivers/base/core.c:4980
urb_ctl_callback+0x1eb/0x2f0 drivers/input/misc/yealink.c:456
__usb_hcd_giveback_urb+0x38b/0x610 drivers/usb/core/hcd.c:1661
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1745
dummy_timer+0x1809/0x3ad0 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x202/0xc40 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858
handle_softirqs+0x208/0x940 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_one_record+0x995/0xc60 kernel/printk/printk.c:3216
Code: 00 e8 8f 65 29 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 8d 49 21 00 48 85 ed 0f 85 8e 01 00 00 e8 af 4e 21 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 84 b4 fe ff ff 4c 89 ef e8 74 1b 83
RSP: 0018:ffffc9000009f830 EFLAGS: 00000293
RAX: ffffffff89816558 RBX: 0000000000000001 RCX: ffffffff815e9df3
RDX: ffff888101ab0000 RSI: ffffffff815e9e01 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888101ab0aa8 R12: 0000000000000001
R13: ffffffff89816558 R14: ffffffff89816500 R15: dffffc0000000000
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
m920x_rc_core_query+0x2d7/0x500 drivers/media/usb/dvb-usb/m920x.c:229
dvb_usb_read_remote_control+0xdd/0x1c0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
INFO: task kworker/1:8:9299 blocked for more than 174 seconds.
yealink 2-1:36.0: urb_irq_callback - urb status -71
Not tainted syzkaller #0
yealink 2-1:36.0: unexpected response 0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8 state:D
yealink 2-1:36.0: urb_ctl_callback - urb status -71
stack:22040 pid:9299 tgid:9299 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
Call Trace:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
yealink 2-1:36.0: urb_ctl_callback - urb status -71
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
yealink 2-1:36.0: urb_irq_callback - urb status -71
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
yealink 2-1:36.0: unexpected response 0
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
yealink 2-1:36.0: unexpected response 0
kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
yealink 2-1:36.0: urb_ctl_callback - urb status -71
kernfs_create_dir_ns+0xfc/0x1a0 fs/kernfs/dir.c:1096
yealink 2-1:36.0: urb_irq_callback - urb status -71
sysfs_create_dir_ns+0x13a/0x2b0 fs/sysfs/dir.c:59
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x2c4/0x9d0 lib/kobject.c:240
yealink 2-1:36.0: urb_irq_callback - urb status -71
kobject_add_varg lib/kobject.c:374 [inline]
kobject_add+0x16e/0x240 lib/kobject.c:426
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
device_add+0x288/0x1980 drivers/base/core.c:3627
yealink 2-1:36.0: urb_ctl_callback - urb status -71
usb_set_configuration+0x1187/0x1e50 drivers/usb/core/message.c:2210
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x241/0xb20 drivers/base/dd.c:659
yealink 2-1:36.0: unexpected response 0
__driver_probe_device+0x1de/0x470 drivers/base/dd.c:801
yealink 2-1:36.0: urb_ctl_callback - urb status -71
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
__device_attach_driver+0x1df/0x350 drivers/base/dd.c:959
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
__device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086
yealink 2-1:36.0: urb_irq_callback - urb status -71
bus_probe_device+0x64/0x150 drivers/base/bus.c:574
yealink 2-1:36.0: unexpected response 0
device_add+0x116e/0x1980 drivers/base/core.c:3689
yealink 2-1:36.0: urb_ctl_callback - urb status -71
usb_new_device+0xd07/0x1a90 drivers/usb/core/hub.c:2695
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x31bf/0x5420 drivers/usb/core/hub.c:5953
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
yealink 2-1:36.0: unexpected response 0
kthread+0x3c5/0x780 kernel/kthread.c:463
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
yealink 2-1:36.0: urb_ctl_callback - urb status -71
INFO: task syz.3.2204:13379 blocked for more than 174 seconds.
yealink 2-1:36.0: urb_irq_callback - urb status -71
Not tainted syzkaller #0
Blocked by coredump.
yealink 2-1:36.0: unexpected response 0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2204 state:D stack:26696 pid:13379 tgid:13379 ppid:2975 task_flags:0x40044c flags:0x00080003
yealink 2-1:36.0: urb_ctl_callback - urb status -71
Call Trace:
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
yealink 2-1:36.0: urb_ctl_callback - urb status -71
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
yealink 2-1:36.0: unexpected response 0
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
yealink 2-1:36.0: urb_ctl_callback - urb status -71
remove_bind_files drivers/base/bus.c:642 [inline]
bus_remove_driver+0x24d/0x2e0 drivers/base/bus.c:780
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
yealink 2-1:36.0: urb_irq_callback - urb status -71
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
yealink 2-1:36.0: unexpected response 0
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
yealink 2-1:36.0: urb_ctl_callback - urb status -71
get_signal+0x2671/0x26d0 kernel/signal.c:3034
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x80/0x4f0 kernel/entry/common.c:75
yealink 2-1:36.0: urb_ctl_callback - urb status -71
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4bb/0x570 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
yealink 2-1:36.0: urb_irq_callback - urb status -71
RIP: 0033:0x7f1349682005
yealink 2-1:36.0: unexpected response 0
RSP: 002b:00007ffe72348290 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 00007f13498a5fa0 RCX: 00007f1349682005
yealink 2-1:36.0: urb_ctl_callback - urb status -71
RDX: 00007ffe723482d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f13498a7da0 R08: 0000000000000000 R09: 00007f13494b8000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000115649
R13: 00007f13498a6090 R14: ffffffffffffffff R15: 00007ffe72348410
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
INFO: task syz.0.2205:13392 blocked for more than 174 seconds.
yealink 2-1:36.0: urb_ctl_callback - urb status -71
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2205 state:D
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
stack:27704 pid:13392 tgid:13384 ppid:2970 task_flags:0x40044c flags:0x00080003
Call Trace:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x145d/0x4a00 kernel/sched/core.c:6863
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
yealink 2-1:36.0: urb_ctl_callback - urb status -71
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
yealink 2-1:36.0: urb_irq_callback - urb status -71
rwsem_down_write_slowpath+0x521/0x1310 kernel/locking/rwsem.c:1185
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
sysfs_remove_file include/linux/sysfs.h:780 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
yealink 2-1:36.0: urb_irq_callback - urb status -71
remove_bind_files drivers/base/bus.c:642 [inline]
bus_remove_driver+0x24d/0x2e0 drivers/base/bus.c:780
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
yealink 2-1:36.0: urb_irq_callback - urb status -71
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
yealink 2-1:36.0: unexpected response 0
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
yealink 2-1:36.0: urb_ctl_callback - urb status -71
get_signal+0x2671/0x26d0 kernel/signal.c:3034
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x80/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4bb/0x570 arch/x86/entry/syscall_64.c:100
yealink 2-1:36.0: urb_ctl_callback - urb status -71
entry_SYSCALL_64_after_hwframe+0x77/0x7f
yealink 2-1:36.0: urb_irq_callback - urb status -71
RIP: 0033:0x7fd23c922005
yealink 2-1:36.0: unexpected response 0
RSP: 002b:00007fd23b32dfa0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00000000ffffffff RCX: 00007fd23c922005
RDX: 00007fd23b32dfe0 RSI: 0000000000000000 RDI: 0000000000000000
yealink 2-1:36.0: urb_ctl_callback - urb status -71
RBP: 00007fd23c973f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fd23cb46128 R14: 00007fd23cb46090 R15: 00007ffcbfd38c68
yealink 2-1:36.0: urb_irq_callback - urb status -71
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
yealink 2-1:36.0: unexpected response 0
Showing all locks held in the system:
5 locks held by kworker/0:1/10:
2 locks held by kworker/R-mm_pe/13:
1 lock held by khungtaskd/30:
#0: ffffffff892cd6e0 (rcu_read_lock){....}-{1:3}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
5 locks held by kworker/0:2/1123:
2 locks held by getty/2921:
yealink 2-1:36.0: urb_irq_callback - urb status -71
#0: ffff88810773e0a0
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(&tty->ldisc_sem
yealink 2-1:36.0: urb_irq_callback - urb status -71
){++++}-{0:0}
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
yealink 2-1:36.0: urb_irq_callback - urb status -71
#1:
yealink 2-1:36.0: unexpected response 0
ffffc900000452f0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(
yealink 2-1:36.0: urb_irq_callback - urb status -71
&ldata->atomic_read_lock
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
){+.+.}-{4:4}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: n_tty_read+0x41b/0x1510 drivers/tty/n_tty.c:2211
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
1 lock held by syz-executor/2966:
yealink 2-1:36.0: urb_irq_callback - urb status -71
#0:
yealink 2-1:36.0: unexpected response 0
ffff888100ac5988
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(
yealink 2-1:36.0: urb_irq_callback - urb status -71
&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
yealink 2-1:36.0: urb_irq_callback - urb status -71
1 lock held by syz-executor/2967:
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
#0:
yealink 2-1:36.0: urb_irq_callback - urb status -71
ffff888100ac5988 (
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
1 lock held by syz-executor/2970:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
yealink 2-1:36.0: unexpected response 0
1 lock held by syz-executor/2971:
#0: ffff888100ac5988 (&root->kernfs_rwsem
yealink 2-1:36.0: urb_ctl_callback - urb status -71
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
yealink 2-1:36.0: urb_irq_callback - urb status -71
1 lock held by syz-executor/2975:
#0: ffff888100ac5988
yealink 2-1:36.0: unexpected response 0
(&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1165
yealink 2-1:36.0: urb_ctl_callback - urb status -71
4 locks held by kworker/0:3/5217:
yealink 2-1:36.0: urb_irq_callback - urb status -71
4 locks held by kworker/1:2/5223:
yealink 2-1:36.0: unexpected response 0
#0: ffff888100071948 ((wq_completion)events
yealink 2-1:36.0: urb_ctl_callback - urb status -71
){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc9000222fca0
yealink 2-1:36.0: urb_irq_callback - urb status -71
(
yealink 2-1:36.0: unexpected response 0
kernfs_notify_work
){+.+.}-{0:0}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2: ffff888100ac5ab8 (&root->kernfs_supers_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: kernfs_notify_workfn+0xf7/0xb30 fs/kernfs/file.c:932
yealink 2-1:36.0: unexpected response 0
#3:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
ffff888100ac5988 (
&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_notify_workfn+0xff/0xb30 fs/kernfs/file.c:933
yealink 2-1:36.0: urb_irq_callback - urb status -71
1 lock held by udevd/5269:
yealink 2-1:36.0: unexpected response 0
5 locks held by kworker/1:8/9299:
#0: ffff888105af4548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc900127afca0 ((work_completion)(&hub->events)
yealink 2-1:36.0: urb_irq_callback - urb status -71
){+.+.}-{0:0}, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
yealink 2-1:36.0: unexpected response 0
#2: ffff88810a369198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#2: ffff88810a369198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1be/0x5420 drivers/usb/core/hub.c:5899
yealink 2-1:36.0: urb_ctl_callback - urb status -71
#3:
yealink 2-1:36.0: urb_irq_callback - urb status -71
ffff8881404ce198
yealink 2-1:36.0: unexpected response 0
(&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
(&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4e0 drivers/base/dd.c:1006
yealink 2-1:36.0: urb_ctl_callback - urb status -71
#4: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
yealink 2-1:36.0: urb_irq_callback - urb status -71
4 locks held by kworker/0:9/11120:
yealink 2-1:36.0: unexpected response 0
5 locks held by kworker/0:11/12319:
#0: ffff888105af4548 (
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
yealink 2-1:36.0: urb_irq_callback - urb status -71
ffffc9000212fca0
yealink 2-1:36.0: unexpected response 0
(
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(work_completion)(&hub->events)){+.+.}-{0:0}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
yealink 2-1:36.0: unexpected response 0
#2:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
ffff88810a739198
(&dev->mutex){....}-{4:4}
yealink 2-1:36.0: urb_irq_callback - urb status -71
, at: device_lock include/linux/device.h:895 [inline]
, at: hub_event+0x1be/0x5420 drivers/usb/core/hub.c:5899
#3: ffff888105ef4278
yealink 2-1:36.0: unexpected response 0
(&(&priv->bus_notifier)->rwsem){++++}-{4:4}, at: blocking_notifier_call_chain kernel/notifier.c:379 [inline]
(&(&priv->bus_notifier)->rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x53/0xa0 kernel/notifier.c:368
yealink 2-1:36.0: urb_ctl_callback - urb status -71
#4:
ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_activate fs/kernfs/dir.c:1428 [inline]
ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x349/0x840 fs/kernfs/dir.c:837
yealink 2-1:36.0: urb_irq_callback - urb status -71
3 locks held by kworker/0:12/12633:
yealink 2-1:36.0: unexpected response 0
1 lock held by syz.3.2204/13379:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
yealink 2-1:36.0: urb_irq_callback - urb status -71
1 lock held by syz.0.2205/13392:
yealink 2-1:36.0: unexpected response 0
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
1 lock held by syz.2.2207/13387:
yealink 2-1:36.0: urb_irq_callback - urb status -71
#0: ffff888100ac5988
yealink 2-1:36.0: unexpected response 0
(&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
yealink 2-1:36.0: urb_ctl_callback - urb status -71
1 lock held by syz.1.2206/13389:
#0: ffff888100ac5988 (
yealink 2-1:36.0: urb_irq_callback - urb status -71
&root->kernfs_rwsem
yealink 2-1:36.0: unexpected response 0
){++++}-{4:4}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: kernfs_remove_by_name_ns+0x3d/0x100 fs/kernfs/dir.c:1715
1 lock held by syz.4.2208/13391:
#0: ffff888100ac5988 (
yealink 2-1:36.0: urb_irq_callback - urb status -71
&root->kernfs_rwsem
){++++}-{4:4}
yealink 2-1:36.0: unexpected response 0
, at: kernfs_add_one+0x38/0x840 fs/kernfs/dir.c:794
1 lock held by syz-executor/13393:
#0: ffff888100ac5988
yealink 2-1:36.0: urb_ctl_callback - urb status -71
(&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13394:
yealink 2-1:36.0: urb_irq_callback - urb status -71
#0: ffff888100ac5988 (
yealink 2-1:36.0: unexpected response 0
&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13395:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
#0:
yealink 2-1:36.0: urb_irq_callback - urb status -71
ffff888100ac5988
yealink 2-1:36.0: unexpected response 0
(&root->kernfs_rwsem){++++}-{4:4}
yealink 2-1:36.0: urb_ctl_callback - urb status -71
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13396:
#0: ffff888100ac5988 (&root->kernfs_rwsem
yealink 2-1:36.0: urb_irq_callback - urb status -71
){++++}-{4:4}
yealink 2-1:36.0: unexpected response 0
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
1 lock held by syz-executor/13397:
#0: ffff888100ac5988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1183
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x133/0x180 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xe66/0x1180 kernel/hung_task.c:515
yealink 2-1:36.0: urb_ctl_callback - urb status -71
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x74f/0xa30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
yealink 2-1:36.0: urb_irq_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11120 Comm: kworker/0:9 Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:407
Code: 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 1c 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d e9 06 7a 75 04 e8 a1 4c fd fe eb a0 e8 2a 4d fd
RSP: 0018:ffffc900000074d0 EFLAGS: 00000002
RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff82e46c25 RDI: ffffffff93c8afc0