linux-kernel - Re: [syzbot] BUG: unable to handle kernel paging request in vga16fb

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Date:   Sat, 01 May 2021 18:53:10 -0700
From:   syzbot <syzbot+1f29e126cf461c4de3b3@...kaller.appspotmail.com>
To:     b.zolnierkie@...sung.com, colin.king@...onical.com,
        daniel.vetter@...ll.ch, dri-devel@...ts.freedesktop.org,
        gregkh@...uxfoundation.org, jani.nikula@...el.com,
        jirislaby@...nel.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, penguin-kernel@...ove.sakura.ne.jp,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] BUG: unable to handle kernel paging request in
 vga16fb_imageblit (2)

syzbot has bisected this issue to:

commit 988d0763361bb65690d60e2bc53a6b72777040c3
Author: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Date:   Sun Sep 27 11:46:30 2020 +0000

    vt_ioctl: make VT_RESIZEX behave like VT_RESIZE

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15633759d00000
start commit:   d2b6f8a1 Merge tag 'xfs-5.13-merge-3' of git://git.kernel...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=17633759d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13633759d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=53fdf14defd48c56
dashboard link: https://syzkaller.appspot.com/bug?extid=1f29e126cf461c4de3b3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16d9ff43d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10981693d00000

Reported-by: syzbot+1f29e126cf461c4de3b3@...kaller.appspotmail.com
Fixes: 988d0763361b ("vt_ioctl: make VT_RESIZEX behave like VT_RESIZE")

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