syzbot


INFO: task hung in __blkdev_get (3)

Status: closed as invalid on 2019/05/08 13:05
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 1256d, last: 1256d
similar bugs (9):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in __blkdev_get C 1504 1030d 1263d 0/3 public: reported C repro on 2019/04/12 00:00
android-44 INFO: task hung in __blkdev_get syz 521 1033d 1261d 0/2 public: reported syz repro on 2019/04/14 00:02
android-414 INFO: task hung in __blkdev_get 1859 1030d 1262d 0/1 auto-closed as invalid on 2020/02/28 16:13
upstream INFO: task hung in __blkdev_get (2) 11 1354d 1478d 0/24 closed as dup on 2018/09/08 15:48
linux-4.14 INFO: task hung in __blkdev_get C 729 5d13h 1263d 0/1 upstream: reported C repro on 2019/04/11 13:17
upstream INFO: task hung in __blkdev_get C 662 1626d 1751d 6/24 fixed on 2018/05/08 18:30
linux-4.19 INFO: task hung in __blkdev_get C error 117 4d21h 1140d 0/1 upstream: reported C repro on 2019/08/13 00:10
upstream INFO: task hung in __blkdev_get (4) 1 1075d 1075d 0/24 auto-closed as invalid on 2020/01/15 05:33
upstream INFO: task hung in __blkdev_get (5) 8 653d 868d 0/24 auto-closed as invalid on 2021/03/11 14:46

Sample crash report:
INFO: task blkid:10403 blocked for more than 143 seconds.
      Not tainted 5.1.0-rc5+ #73
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28912 10403   8323 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x813/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 __blkdev_get+0x19b/0x1660 fs/block_dev.c:1513
 blkdev_get+0xc4/0x990 fs/block_dev.c:1667
 blkdev_open+0x205/0x290 fs/block_dev.c:1825

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/04/18 20:57 upstream e53f31bffe1d b0e8efcb .config log report
* Struck through repros no longer work on HEAD.