INFO: task hung in usbdev_open (2)

Status: upstream: reported on 2023/02/13 07:50
Reported-by: syzbot+5741928503aad4795c45@syzkaller.appspotmail.com
First crash: 1275d, last: 1275d
▶ ▼ Similar bugs (15)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in usbdev_open (3) 1 1 1325d 1325d 0/1 upstream: reported on 2022/12/25 16:08
upstream INFO: task hung in usbdev_open (2) usb 1 syz, C error 3291 1d12h 2051d 0/29 upstream: reported C repro on 2020/12/29 11:48
linux-6.1 INFO: task hung in usbdev_open origin:lts-only 1 syz, C done 3 1171d 1228d 3/3 fixed on 2023/06/28 17:15
linux-4.19 INFO: task hung in usbdev_open (2) 1 2 1724d 1731d 0/1 auto-closed as invalid on 2022/03/21 09:54
linux-5.15 INFO: task hung in usbdev_open origin:lts-only 1 syz, C error 19 689d 1228d 0/3 auto-obsoleted due to no activity on 2024/12/30 11:10
android-6-12 INFO: task hung in usbdev_open origin:upstream 1 syz 63 2d09h 413d 0/1 premoderation: reported syz repro on 2025/06/24 04:17
linux-6.1 INFO: task hung in usbdev_open (2) 1 1 974d 974d 0/3 auto-obsoleted due to no activity on 2024/03/20 05:29
linux-4.19 INFO: task hung in usbdev_open 1 6 2024d 2110d 0/1 auto-closed as invalid on 2021/05/25 14:21
linux-4.14 INFO: task hung in usbdev_open 1 7 1983d 2122d 0/1 auto-closed as invalid on 2021/07/05 05:59
upstream INFO: task hung in usbdev_open usb 1 2 2512d 2512d 0/29 auto-closed as invalid on 2019/12/23 20:14
linux-5.15 INFO: task hung in usbdev_open (2) 1 1 4d02h 4d02h 0/3 upstream: reported on 2026/08/07 14:05
linux-6.1 INFO: task hung in usbdev_open (3) 1 1 863d 863d 0/3 auto-obsoleted due to no activity on 2024/07/09 03:03
linux-6.6 INFO: task hung in usbdev_open (2) 1 1 26d 26d 0/2 upstream: reported on 2026/07/15 16:52
linux-6.6 INFO: task hung in usbdev_open 1 4 153d 230d 0/2 auto-obsoleted due to no activity on 2026/06/18 23:09
upstream INFO: task can't die in usbdev_open usb 1 4 2016d 2129d 0/29 auto-closed as invalid on 2021/04/02 18:49

Sample crash report:
Bluetooth: hci5 command 0x0406 tx timeout
Bluetooth: hci0 command 0x0406 tx timeout
Bluetooth: hci1 command 0x0406 tx timeout
Bluetooth: hci2 command 0x0406 tx timeout
Bluetooth: hci3 command 0x0406 tx timeout
INFO: task syz-executor.2:9549 blocked for more than 140 seconds.
      Not tainted 4.14.305-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D29776  9549   8027 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2811 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3386
 schedule+0x8d/0x1b0 kernel/sched/core.c:3430
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
 device_lock include/linux/device.h:1082 [inline]
 usbdev_open+0x142/0x790 drivers/usb/core/devio.c:1023
 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423
 do_dentry_open+0x44b/0xec0 fs/open.c:777

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/13 07:49 linux-4.14.y a8ad60f2af58 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 INFO: task hung in usbdev_open
* Struck through repros no longer work on HEAD.