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Date: Wed, 03 Feb 2016 10:35:14 +0100
Message-ID: <s5hpowe2l2l.wl-tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: "Dmitry Vyukov" <dvyukov@google.com>
Cc: <alsa-devel@alsa-project.org>, "Jaroslav Kysela" <perex@perex.cz>,
        "LKML" <linux-kernel@vger.kernel.org>,
        "Alexander Potapenko" <glider@google.com>,
        "Kostya Serebryany" <kcc@google.com>,
        "syzkaller" <syzkaller@googlegroups.com>,
        "Sasha Levin" <sasha.levin@oracle.com>
Subject: Re: sound: out-of-bounds write in snd_rawmidi_kernel_write1
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On Wed, 03 Feb 2016 09:57:50 +0100,
Dmitry Vyukov wrote:
> 
> Hello,
> 
> The following program triggers an out-of-bounds write in
> snd_rawmidi_kernel_write1 (run in parallel loop). It seems to try to
> copy -1 bytes (aka 4GB) from user space into kernel smashing all on
> its way.

What card is /dev/midi3?  Please check /proc/asound/cards.
Is it MTPAV?


Takashi