syzbot suspects this issue was fixed by commit:
commit 033724d6864245a11f8e04c066002e6ad22b3fd0
Author: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Date: Wed Jul 15 01:51:02 2020 +0000
fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13f979f6900000
start commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f
dashboard link: https://syzkaller.appspot.com/bug?extid=cd66e43794b178bb5cd6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a42329e00000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
