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

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Message-ID: <CACT4Y+bCHOCLYF+TW062n8+tqfK9vizaRvyjUXNPdneciq0Ahg@mail.gmail.com>
Date:   Thu, 5 Dec 2019 11:16:08 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     syzbot <syzbot+4455ca3b3291de891abc@...kaller.appspotmail.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        DRI <dri-devel@...ts.freedesktop.org>, ghalat@...hat.com,
        Gleb Natapov <gleb@...nel.org>, gwshan@...ux.vnet.ibm.com,
        "H. Peter Anvin" <hpa@...or.com>, James Morris <jmorris@...ei.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        KVM list <kvm@...r.kernel.org>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-security-module <linux-security-module@...r.kernel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Russell Currey <ruscur@...sell.cc>,
        Sam Ravnborg <sam@...nborg.org>,
        "Serge E. Hallyn" <serge@...lyn.com>, stewart@...ux.vnet.ibm.com,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Kentaro Takeda <takedakn@...data.co.jp>,
        Thomas Gleixner <tglx@...utronix.de>,
        "the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: KASAN: slab-out-of-bounds Read in fbcon_get_font

On Thu, Dec 5, 2019 at 11:13 AM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> On 04/12/19 22:41, syzbot wrote:
> > syzbot has bisected this bug to:
> >
> > commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
> > Author: Russell Currey <ruscur@...sell.cc>
> > Date:   Mon Feb 8 04:08:20 2016 +0000
> >
> >     powerpc/powernv: Remove support for p5ioc2
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=127a042ae00000
> > start commit:   76bb8b05 Merge tag 'kbuild-v5.5' of
> > git://git.kernel.org/p..
> > git tree:       upstream
> > final crash:    https://syzkaller.appspot.com/x/report.txt?x=117a042ae00000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=167a042ae00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=dd226651cb0f364b
> > dashboard link:
> > https://syzkaller.appspot.com/bug?extid=4455ca3b3291de891abc
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11181edae00000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=105cbb7ae00000
> >
> > Reported-by: syzbot+4455ca3b3291de891abc@...kaller.appspotmail.com
> > 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?

The To list should be intersection of 2 groups of emails: result of
get_maintainers.pl on the file identified as culprit in the crash
message + emails extracted from the bisected to commit.