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
Date: Wed, 03 Feb 2016 10:35:14 +0100 [thread overview]
Message-ID: <s5hpowe2l2l.wl-tiwai@suse.de> (raw)
In-Reply-To: <CACT4Y+b-dCmNf1GpgPKfDO0ih+uZCL2JV4__j-r1kdhPLSgQCQ@mail.gmail.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Takashi Iwai <tiwai@suse.de>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: alsa-devel@alsa-project.org, LKML <linux-kernel@vger.kernel.org>,
Kostya Serebryany <kcc@google.com>,
syzkaller <syzkaller@googlegroups.com>,
Alexander Potapenko <glider@google.com>,
Sasha Levin <sasha.levin@oracle.com>
Subject: Re: sound: out-of-bounds write in snd_rawmidi_kernel_write1
Date: Wed, 03 Feb 2016 10:35:14 +0100 [thread overview]
Message-ID: <s5hpowe2l2l.wl-tiwai@suse.de> (raw)
In-Reply-To: <CACT4Y+b-dCmNf1GpgPKfDO0ih+uZCL2JV4__j-r1kdhPLSgQCQ@mail.gmail.com>
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
next prev parent reply other threads:[~2016-02-03 9:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 8:57 sound: out-of-bounds write in snd_rawmidi_kernel_write1 Dmitry Vyukov
2016-02-03 8:57 ` Dmitry Vyukov
2016-02-03 9:35 ` Takashi Iwai [this message]
2016-02-03 9:35 ` Takashi Iwai
2016-02-03 9:41 ` Takashi Iwai
2016-02-03 9:41 ` Takashi Iwai
2016-02-03 11:39 ` Takashi Iwai
2016-02-03 11:39 ` Takashi Iwai
2016-02-03 12:02 ` Takashi Iwai
2016-02-03 12:02 ` Takashi Iwai
2016-02-03 13:37 ` Dmitry Vyukov
2016-02-03 14:26 ` Takashi Iwai
2016-02-03 13:25 ` Dmitry Vyukov
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