syzbot


WARNING: lock held when returning to user space in ovl_write_iter
Status: fixed on 2020/04/15 17:19
Reported-by: syzbot+9331a354f4f624a52a55@syzkaller.appspotmail.com
Fix commit: c853680453ac ovl: fix lockdep warning for async write
First crash: 649d, last: 632d

Cause bisection: introduced by (bisect log) :
commit 2406a307ac7ddfd7effeeaff6947149ec6a95b4e
Author: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Date: Wed Nov 20 09:45:26 2019 +0000

  ovl: implement async IO routines

Crash: WARNING: lock held when returning to user space in ovl_write_iter (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/03/13 08:53 18m miklos@szeredi.hu patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd4 OK
2020/03/12 15:30 19m miklos@szeredi.hu patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd4 OK

Sample crash report:

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/03/05 06:14 upstream 63623fd44972 c88c7b75 .config log report syz C
ci-upstream-kasan-gce-root 2020/03/03 18:19 upstream 63623fd44972 c88c7b75 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/03/01 09:35 upstream 63623fd44972 c88c7b75 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/03/16 18:14 linux-next 770fbb32d34e 749688d2 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/02/28 07:17 linux-next bdc5461b23ca 59b57593 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/02/28 06:30 linux-next bdc5461b23ca 59b57593 .config log report