Re: KASAN: slab-out-of-bounds Read in fbcon_get_font

From: Paolo Bonzini
Date: Thu Dec 05 2019 - 05:13:29 EST


On 04/12/19 22:41, syzbot wrote:
> syzbot has bisected this bug to:
>
> commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
> Author: Russell Currey <ruscur@xxxxxxxxxx>
> Date:ÂÂ Mon Feb 8 04:08:20 2016 +0000
>
> ÂÂÂ powerpc/powernv: Remove support for p5ioc2
>
> bisection log:Â https://syzkaller.appspot.com/x/bisect.txt?x=127a042ae00000
> start commit:ÂÂ 76bb8b05 Merge tag 'kbuild-v5.5' of
> git://git.kernel.org/p..
> git tree:ÂÂÂÂÂÂ upstream
> final crash:ÂÂÂ https://syzkaller.appspot.com/x/report.txt?x=117a042ae00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=167a042ae00000
> kernel config:Â https://syzkaller.appspot.com/x/.config?x=dd226651cb0f364b
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=4455ca3b3291de891abc
> syz repro:ÂÂÂÂÂ https://syzkaller.appspot.com/x/repro.syz?x=11181edae00000
> C reproducer:ÂÂ https://syzkaller.appspot.com/x/repro.c?x=105cbb7ae00000
>
> Reported-by: syzbot+4455ca3b3291de891abc@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 2de50e9674fc ("powerpc/powernv: Remove support for p5ioc2")
>
> For information about bisection process see:
> https://goo.gl/tpsmEJ#bisection
>

Why is everybody being CC'd, even if the bug has nothing to do with the
person's subsystem?

Thanks,

Paolo