syzbot


INFO: task hung in do_truncate (2)
Status: upstream: reported C repro on 2020/06/11 04:48
Reported-by: syzbot+18b2ab4c697021ee8369@syzkaller.appspotmail.com
First crash: 470d, last: 24d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit dfefd226b0bf7c435a58d75a0ce2f9273b9825f6
Author: Alexey Dobriyan <adobriyan@gmail.com>
Date: Tue Dec 15 03:15:03 2020 +0000

  mm: cleanup kstrto*() usage

similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in do_truncate C 7 1039d 1202d 0/22 closed as dup on 2018/09/08 15:38

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/06/07 04:44 upstream 7ae77150d94d e6b89e4e .config log report syz C
ci-upstream-kasan-gce-selinux-root 2021/08/26 10:47 upstream 73f3af7b4611 b599f2fc .config log report info INFO: task hung in do_truncate
ci-upstream-kasan-gce-smack-root 2021/07/30 02:35 upstream 7e96bf476270 c585c7b0 .config log report info INFO: task hung in do_truncate
ci-upstream-kasan-gce-selinux-root 2021/07/19 23:00 upstream 2734d6c1b1a0 bc48c9ab .config log report info INFO: task hung in do_truncate
ci-upstream-kasan-gce-selinux-root 2021/07/01 23:36 upstream e04360a2ea01 658ebc66 .config log report info INFO: task hung in do_truncate