linux-kernel - Re: [alsa-devel] usb/sound: use-after-free in __uac_clock_find

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Date:   Tue, 21 Nov 2017 17:27:29 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
        LKML <linux-kernel@...r.kernel.org>,
        Kostya Serebryany <kcc@...gle.com>,
        syzkaller <syzkaller@...glegroups.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [alsa-devel] usb/sound: use-after-free in __uac_clock_find_source

On Tue, 21 Nov 2017 14:52:00 +0100,
Andrey Konovalov wrote:
> 
> Hi!
> 
> I've got the following report while fuzzing the kernel with syzkaller.
> 
> On commit e1d1ea549b57790a3d8cf6300e6ef86118d692a3 (4.15-rc1).
> 
> This actually looks more like an out-of-bounds with large offset than
> a use-after-free due to unrelated alloc and free stack traces.

Yes, similar as the previous report, but at this time, it's about the
clock selector stuff.  Will provide the fix patch, too.


thanks,

Takashi