linux-kernel - Re: divide error in fbcon

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Date:   Mon, 27 Jul 2020 09:45:08 -0700
From:   syzbot <syzbot+13013adc4a234406c29e@...kaller.appspotmail.com>
To:     b.zolnierkie@...sung.com, daniel.thompson@...aro.org,
        daniel.vetter@...ll.ch, dri-devel@...ts.freedesktop.org,
        ghalat@...hat.com, gregkh@...uxfoundation.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        maarten.lankhorst@...ux.intel.com,
        penguin-kernel@...ove.SAKURA.ne.jp,
        penguin-kernel@...ove.sakura.ne.jp, sam@...nborg.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: divide error in fbcon_switch

syzbot suspects this issue was fixed by commit:

commit ce684552a266cb1c7cc2f7e623f38567adec6653
Author: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Date:   Sun Jul 12 11:10:12 2020 +0000

    vt: Reject zero-sized screen buffer size.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=155549c4900000
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=13013adc4a234406c29e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17d69aeae00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13fdcc2ae00000

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

#syz fix: vt: Reject zero-sized screen buffer size.

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