syzbot


KASAN: slab-out-of-bounds Read in ovl_check_fb_len
Status: fixed on 2020/07/17 17:58
Reported-by: syzbot+61958888b1c60361a791@syzkaller.appspotmail.com
Fix commit: 522f6e6c ovl: fix out of bounds access warning in ovl_check_fb_len()
First crash: 82d, last: 82d

Cause bisection: introduced by (bisect log):

commit cbe7fba8edfc8cb8e621599e376f8ac5c224fa72
Author: Amir Goldstein <amir73il@gmail.com>
Date: Fri Nov 15 11:33:03 2019 +0000

  ovl: make sure that real fid is 32bit aligned in memory

Crash: KASAN: slab-out-of-bounds Read in ovl_check_fb_len (log)
Repro: syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/05/23 09:17 17m amir73il@gmail.com https://github.com/amir73il/linux.git ovl-fixes OK

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-root 2020/05/21 20:48 upstream b85051e7 1f30020f .config log report syz linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root 2020/05/21 21:43 linux-next ac935d22 1f30020f .config log report syz linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root 2020/05/21 20:21 upstream b85051e7 1f30020f .config log report linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu