syzbot


KASAN: slab-out-of-bounds Read in vcs_scr_readw
Status: fixed on 2020/01/08 01:06
Reported-by: syzbot+7d027845265d531ba506@syzkaller.appspotmail.com
Fix commit: 0c9acb1af77a vcs: prevent write access to vcsu devices
First crash: 727d, last: 726d

Cause bisection: introduced by (bisect log) :
commit d21b0be246bf3bbf569e6e239f56abb529c7154e
Author: Nicolas Pitre <nicolas.pitre@linaro.org>
Date: Wed Jun 27 03:56:41 2018 +0000

  vt: introduce unicode mode for /dev/vcs

Crash: KASAN: slab-out-of-bounds Read in vcs_scr_readw (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit 0c9acb1af77a3cb8707e43f45b72c95266903cee
Author: Nicolas Pitre <nico@fluxnic.net>
Date: Tue Nov 5 09:33:16 2019 +0000

  vcs: prevent write access to vcsu devices

similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: slab-out-of-bounds Read in vcs_scr_readw C inconclusive 80 717d 727d 1/1 fixed on 2020/09/18 07:23

Sample crash report:

Crashes (16):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/12/04 06:37 upstream 76bb8b05960c ae13a849 .config log report syz C
ci-upstream-kasan-gce-root 2019/12/04 06:03 upstream 76bb8b05960c ae13a849 .config log report syz C
ci-upstream-kasan-gce-root 2019/12/04 04:55 upstream 76bb8b05960c ae13a849 .config log report syz C
ci-upstream-kasan-gce 2019/12/03 09:08 upstream 596cf45cbf6e ab342da3 .config log report syz C
ci-upstream-kasan-gce 2019/12/03 08:02 upstream 596cf45cbf6e ab342da3 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/12/03 01:09 upstream 596cf45cbf6e ab342da3 .config log report syz C
ci-upstream-kasan-gce-386 2019/12/03 10:23 upstream 596cf45cbf6e ab342da3 .config log report syz C
ci-upstream-kasan-gce-386 2019/12/03 09:16 upstream 596cf45cbf6e ab342da3 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/12/04 04:47 upstream 76bb8b05960c ae13a849 .config log report
ci-upstream-kasan-gce-root 2019/12/04 04:23 upstream 76bb8b05960c ae13a849 .config log report
ci-upstream-kasan-gce-root 2019/12/04 00:59 upstream 76bb8b05960c ae13a849 .config log report
ci-upstream-kasan-gce 2019/12/04 00:47 upstream 76bb8b05960c ae13a849 .config log report
ci-upstream-kasan-gce-selinux-root 2019/12/03 23:29 upstream 76bb8b05960c ae13a849 .config log report
ci-upstream-kasan-gce-selinux-root 2019/12/03 14:33 upstream 76bb8b05960c ab342da3 .config log report
ci-upstream-kasan-gce-root 2019/12/03 07:19 upstream 596cf45cbf6e ab342da3 .config log report
ci-upstream-kasan-gce-selinux-root 2019/12/03 00:20 upstream 596cf45cbf6e ab342da3 .config log report