On 07.10.24 13:05, syzbot wrote:
INFO: task kworker/1:0:25 blocked for more than 144 seconds.
Not tainted 6.12.0-rc1-next-20241003-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:20416 pid:25 tgid:25 ppid:2 flags:0x00004000
Workqueue: pm pm_runtime_work
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
usb_poison_urb+0x1bc/0x2e0 drivers/usb/core/urb.c:763
This points to a bug in the HCD.
usb_poison_urb() is guaranteed to make progress.
poison_urbs drivers/usb/class/cdc-wdm.c:342 [inline]
wdm_suspend+0x174/0x380 drivers/usb/class/cdc-wdm.c:1271
usb_suspend_interface drivers/usb/core/driver.c:1328 [inline]
usb_suspend_both+0x2a5/0x1140 drivers/usb/core/driver.c:1433
usb_runtime_suspend+0x59/0x100 drivers/usb/core/driver.c:1968
What HC is used for these tests?
Regards
Oliver
