linux-kernel - Re: KASAN: slab-out-of-bounds Read in vcs_scr

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Date:   Fri, 03 Jan 2020 01:48:01 -0800
From:   syzbot <syzbot+7d027845265d531ba506@...kaller.appspotmail.com>
To:     daniel.vetter@...ll.ch, dave@...lke.cc, ghalat@...hat.com,
        gregkh@...uxfoundation.org, jslaby@...e.com, kilobyte@...band.pl,
        linux-kernel@...r.kernel.org, nico@...xnic.net, nico@...aro.org,
        nicolas.pitre@...aro.org, npitre@...libre.com, sam@...nborg.org,
        syzkaller-bugs@...glegroups.com, textshell@...uujin.de,
        tomli@...li.me
Subject: Re: KASAN: slab-out-of-bounds Read in vcs_scr_readw

syzbot suspects this bug was fixed by commit:

commit 0c9acb1af77a3cb8707e43f45b72c95266903cee
Author: Nicolas Pitre <nico@...xnic.net>
Date:   Tue Nov 5 09:33:16 2019 +0000

     vcs: prevent write access to vcsu devices

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11602fb6e00000
start commit:   76bb8b05 Merge tag 'kbuild-v5.5' of git://git.kernel.org/p..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=dd226651cb0f364b
dashboard link: https://syzkaller.appspot.com/bug?extid=7d027845265d531ba506
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17c0459ce00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11d4477ae00000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: vcs: prevent write access to vcsu devices

For information about bisection process see: https://goo.gl/tpsmEJ#bisection