syzbot

 sign-in | mailing list | source | docs
🐞 Open [717]
🐞 Fixed [181]
🐞 Invalid [640]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

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: 804d, last: 804d
▶ ▼ Similar bugs (11)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in usbdev_open (3) 1 853d 853d 0/1 upstream: reported on 2022/12/25 16:08
upstream INFO: task hung in usbdev_open (2) usb C error 1113 18h39m 1580d 0/28 upstream: reported C repro on 2020/12/29 11:48
linux-6.1 INFO: task hung in usbdev_open origin:lts-only C done 3 700d 757d 3/3 fixed on 2023/06/28 17:15
linux-4.19 INFO: task hung in usbdev_open (2) 2 1253d 1260d 0/1 auto-closed as invalid on 2022/03/21 09:54
linux-5.15 INFO: task hung in usbdev_open origin:lts-only C error 19 218d 757d 0/3 auto-obsoleted due to no activity on 2024/12/30 11:10
linux-6.1 INFO: task hung in usbdev_open (2) 1 503d 503d 0/3 auto-obsoleted due to no activity on 2024/03/20 05:29
linux-4.19 INFO: task hung in usbdev_open 6 1552d 1639d 0/1 auto-closed as invalid on 2021/05/25 14:21
linux-4.14 INFO: task hung in usbdev_open 7 1512d 1650d 0/1 auto-closed as invalid on 2021/07/05 05:59
upstream INFO: task hung in usbdev_open usb 2 2041d 2041d 0/28 auto-closed as invalid on 2019/12/23 20:14
linux-6.1 INFO: task hung in usbdev_open (3) 1 392d 392d 0/3 auto-obsoleted due to no activity on 2024/07/09 03:03
upstream INFO: task can't die in usbdev_open usb 4 1545d 1658d 0/28 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.