syzbot


WARNING in ovl_rename
Status: fixed on 2020/02/14 01:19
Reported-by: syzbot+bb1836a212e69f8e201a@syzkaller.appspotmail.com
Fix commit: 6889ee5a ovl: relax WARN_ON() on rename to self
First crash: 431d, last: 431d

Cause bisection: introduced by (bisect log):

commit 6eaf011144af10cad34c0d46f82e50d382c8e926
Author: Amir Goldstein <amir73il@gmail.com>
Date: Thu Oct 12 16:03:04 2017 +0000

  ovl: fix EIO from lookup of non-indexed upper

Crash: WARNING in ovl_rename (log)
Repro: syz .config

Fix bisection: fixed by (bisect log):

commit 146d62e5a5867fbf84490d82455718bfb10fe824
Author: Amir Goldstein <amir73il@gmail.com>
Date: Thu Apr 18 14:42:08 2019 +0000

  ovl: detect overlapping layers

similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.19 WARNING in ovl_rename syz fix 1 431d 431d 1/1 fixed on 2019/12/16 09:09
linux-4.14 WARNING in ovl_rename syz fix 2 199d 431d 1/1 fixed on 2020/01/18 20:51

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-selinux-root 2019/04/28 06:25 upstream 037904a2 b617407b .config log report syz C linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root 2019/04/28 06:15 upstream 037904a2 b617407b .config log report syz C linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root 2019/04/28 05:17 upstream 037904a2 b617407b .config log report syz linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root 2019/04/28 06:10 linux-next 3ddfa8af b617407b .config log report syz linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root 2019/04/28 04:30 upstream 037904a2 b617407b .config log report linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu