INFO: task hung in dev_ioctl

Status: auto-closed as invalid on 2022/08/17 13:11
Reported-by: syzbot+ed546be1c19859a4ae88@syzkaller.appspotmail.com
First crash: 1578d, last: 1578d
▶ ▼ Similar bugs (17)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 INFO: task hung in dev_ioctl 1 1 119d 119d 0/2 auto-obsoleted due to no activity on 2026/07/26 10:38
upstream INFO: task hung in dev_ioctl (4) net 1 1 1915d 1915d 0/29 auto-closed as invalid on 2021/08/15 15:56
android-49 INFO: task hung in dev_ioctl 1 1 2960d 2960d 0/3 auto-closed as invalid on 2019/02/22 12:59
upstream INFO: task hung in dev_ioctl (2) net 1 1 2674d 2674d 0/29 closed as invalid on 2019/05/08 13:05
android-414 INFO: task hung in dev_ioctl 1 2 2877d 2897d 0/1 auto-closed as invalid on 2019/03/27 22:33
upstream INFO: task hung in dev_ioctl (10) prio:high net 1 1 104d 104d 0/29 auto-obsoleted due to no activity on 2026/07/31 13:55
android-414 INFO: task hung in dev_ioctl (2) 1 1 2450d 2450d 0/1 auto-closed as invalid on 2020/03/28 22:15
linux-6.1 INFO: task hung in dev_ioctl 1 3 789d 805d 0/3 auto-obsoleted due to no activity on 2024/09/25 07:18
upstream INFO: task hung in rtnetlink_rcv_msg net 1 syz, C inconclusive inconclusive 1970 767d 2730d 26/29 fixed on 2024/07/09 19:14
upstream INFO: task hung in dev_ioctl (7) net 1 syz 6 524d 524d 0/29 closed as invalid on 2025/04/08 14:38
upstream INFO: task hung in dev_ioctl (8) net 1 1 335d 335d 0/29 auto-obsoleted due to no activity on 2025/12/12 19:44
upstream INFO: task hung in dev_ioctl net 1 2 2875d 2903d 0/29 auto-closed as invalid on 2019/03/30 00:48
upstream INFO: task hung in dev_ioctl (9) net 1 1 216d 216d 0/29 auto-obsoleted due to no activity on 2026/04/10 18:17
upstream INFO: task hung in dev_ioctl (6) net 1 12 668d 693d 0/29 auto-obsoleted due to no activity on 2024/12/04 23:50
upstream INFO: task hung in dev_ioctl (3) net 1 7 2052d 2180d 0/29 auto-closed as invalid on 2021/04/01 04:28
linux-5.15 INFO: task hung in dev_ioctl 1 2 809d 814d 0/3 auto-obsoleted due to no activity on 2024/09/05 06:34
upstream INFO: task hung in dev_ioctl (5) net 1 20 1759d 1804d 0/29 auto-closed as invalid on 2022/01/19 01:57

Sample crash report:
Bluetooth: hci2 command 0x0406 tx timeout
Bluetooth: hci4 command 0x0406 tx timeout
Bluetooth: hci5 command 0x0406 tx timeout
Bluetooth: hci3 command 0x0406 tx timeout
Bluetooth: hci1 command 0x0406 tx timeout
INFO: task systemd-udevd:10565 blocked for more than 140 seconds.
      Not tainted 4.14.275-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
systemd-udevd   D28512 10565   4626 0x00000300
Call Trace:
 context_switch kernel/sched/core.c:2811 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3387
 schedule+0x8d/0x1b0 kernel/sched/core.c:3431
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893
 dev_ioctl+0x6e5/0xbe0 net/core/dev_ioctl.c:490
 sock_do_ioctl net/socket.c:981 [inline]
 sock_ioctl+0x164/0x4c0 net/socket.c:1071
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/04/19 13:11 linux-4.14.y 74766a973637 c334415e .config console log report info ci2-linux-4-14 INFO: task hung in dev_ioctl
* Struck through repros no longer work on HEAD.