syzbot


WARNING in kernfs_new_node
Status: fixed on 2020/05/10 10:41
Reported-by: syzbot+499aea72daa2cea73cb7@syzkaller.appspotmail.com
Fix commit: 810507fe6fd5 locking/lockdep: Reuse freed chain_hlocks entries
First crash: 860d, last: 631d

Cause bisection: introduced by (bisect log) :
commit 726e41097920a73e4c7c33385dcc0debb1281e18
Author: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue Jul 10 00:29:10 2018 +0000

  drivers: core: Remove glue dirs from sysfs earlier

Crash: general protection fault in kernfs_add_one (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit 810507fe6fd5ff3de429121adff49523fabb643a
Author: Waiman Long <longman@redhat.com>
Date: Thu Feb 6 15:24:08 2020 +0000

  locking/lockdep: Reuse freed chain_hlocks entries


Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2019/08/01 20:19 upstream 1e78030e5e5b 835dffe7 .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/08/01 19:43 upstream 1e78030e5e5b 835dffe7 .config log report