syzbot


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: 728d, last: 728d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in dev_ioctl (4) net 1 1065d 1065d 0/26 auto-closed as invalid on 2021/08/15 15:56
android-49 INFO: task hung in dev_ioctl 1 2110d 2110d 0/3 auto-closed as invalid on 2019/02/22 12:59
upstream INFO: task hung in dev_ioctl (2) net 1 1824d 1824d 0/26 closed as invalid on 2019/05/08 13:05
android-414 INFO: task hung in dev_ioctl 2 2027d 2048d 0/1 auto-closed as invalid on 2019/03/27 22:33
android-414 INFO: task hung in dev_ioctl (2) 1 1600d 1600d 0/1 auto-closed as invalid on 2020/03/28 22:15
upstream INFO: task hung in rtnetlink_rcv_msg net C inconclusive inconclusive 913 36d 1880d 0/26 upstream: reported C repro on 2019/02/22 17:00
upstream INFO: task hung in dev_ioctl net 2 2025d 2053d 0/26 auto-closed as invalid on 2019/03/30 00:48
upstream INFO: task hung in dev_ioctl (3) net 7 1202d 1331d 0/26 auto-closed as invalid on 2021/04/01 04:28
upstream INFO: task hung in dev_ioctl (5) net 20 909d 954d 0/26 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.