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

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Message-ID: <CAJZ5v0jVquKnFHrQ+=AyZM2rwOx3CkdGng1z2g2UX30+PJaKDQ@mail.gmail.com>
Date:   Fri, 22 Mar 2019 00:21:51 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     syzbot <syzbot+240f9766d6be3d69431e@...kaller.appspotmail.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>, daniel@...earbox.net,
        David Miller <davem@...emloft.net>, devel@...ica.org,
        Herbert Xu <herbert@...dor.apana.org.au>, kuznet@....inr.ac.ru,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        linux-can@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>, Lv <lv.zheng@...el.com>,
        mkl@...gutronix.de, netdev <netdev@...r.kernel.org>,
        Rafael Wysocki <rafael.j.wysocki@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Robert Moore <robert.moore@...el.com>, socketcan@...tkopp.net,
        steffen.klassert@...unet.com, syzkaller-bugs@...glegroups.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: KASAN: slab-out-of-bounds Read in _decode_session6 (2)

On Fri, Mar 22, 2019 at 12:08 AM syzbot
<syzbot+240f9766d6be3d69431e@...kaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
>
> commit 64fd1c7040880292710e6592ddc88d0d73cfb6fb
> Author: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Date:   Mon Jun 12 20:48:41 2017 +0000
>
>      ACPI / PM: Run wakeup notify handlers synchronously
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1555b12b200000
> start commit:   64fd1c70 ACPI / PM: Run wakeup notify handlers synchronously
> git tree:       upstream
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=1755b12b200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1355b12b200000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=93932074d01b4a5
> dashboard link: https://syzkaller.appspot.com/bug?extid=240f9766d6be3d69431e
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13f35e4d400000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1280edbd400000
>
> Reported-by: syzbot+240f9766d6be3d69431e@...kaller.appspotmail.com
> Fixes: 64fd1c704088 ("ACPI / PM: Run wakeup notify handlers synchronously")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

I don't see how the commit turned up by the bisection can be related
to the reported crash.