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From: Takashi Iwai <tiwai@suse.de>
To: "Cássio Gabriel" <cassiogabrielcontato@gmail.com>
Cc: Takashi Iwai <tiwai@suse.com>, Jaroslav Kysela <perex@perex.cz>,
	Xi Wang <xi.wang@gmail.com>,
	linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org,
	Takashi Iwai <tiwai@suse.de>,
	stable@vger.kernel.org,
	syzbot+d56178c27a4710960820@syzkaller.appspotmail.com
Subject: Re: [PATCH] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES
Date: Thu, 16 Apr 2026 10:57:31 +0200	[thread overview]
Message-ID: <87340vffk4.wl-tiwai@suse.de> (raw)
In-Reply-To: <20260415-usb-audio-uac2-rate-cap-v1-1-5ecbafc120d8@gmail.com>

On Wed, 15 Apr 2026 17:04:53 +0200,
Cássio Gabriel wrote:
> 
> parse_uac2_sample_rate_range() caps the number of enumerated
> rates at MAX_NR_RATES, but it only breaks out of the current
> rate loop. A malformed UAC2 RANGE response with additional
> triplets continues parsing the remaining triplets and repeatedly
> prints "invalid uac2 rates" while probe still holds
> register_mutex.
> 
> Stop the whole parse once the cap is reached and return the
> number of rates collected so far.
> 
> Fixes: 4fa0e81b8350 ("ALSA: usb-audio: fix possible hang and overflow in parse_uac2_sample_rate_range()")
> Cc: stable@vger.kernel.org
> Reported-by: syzbot+d56178c27a4710960820@syzkaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=d56178c27a4710960820
> Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>

Thanks, applied now.


Takashi

      reply	other threads:[~2026-04-16  8:57 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-15 15:04 [PATCH] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES Cássio Gabriel
2026-04-16  8:57 ` Takashi Iwai [this message]

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