From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 130BD3D6481; Mon, 4 May 2026 13:54:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777902855; cv=none; b=S3UZa39OsgS/q7sD5wzmeePYLuDTcQpY1ElVqsdpxf20E7wRB/ic4lo97AdC1RXRo8NdJBFr+9Isv0lM8e10AAk1pnJ6HvfKb2+lF5PzHzd5E0ufufa9oZcNhAktMsdGPMWU7svXBnFf5wKT4J551DbZ4uQo7EA0FYfXaSsCmGI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777902855; c=relaxed/simple; bh=8/d21Op502/bWFcuQefUGYb7GLiyvwLPlC3LHO2t/ag=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=B6yDXnez5hBbzMnvvg2vWYwuLDEmnBbRy9uk6Dlkk+ASHlTXrYNBPpy+n0Us4wkl0/URprcBunfFlcxquCSldLIRHSTm1KlLiBfeYMz8DL4qBs8NjXSBysgfPibhCCMjPljTB/gJgkZ2WlgCFAQdrcrudo9AdLJpwW2GnMHBY60= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=F7LK1lyz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="F7LK1lyz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 626FFC2BCB8; Mon, 4 May 2026 13:54:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1777902854; bh=8/d21Op502/bWFcuQefUGYb7GLiyvwLPlC3LHO2t/ag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F7LK1lyzRDmuBQ8ab8ZHpvNy24fmk1WDN3pyExuj2H4oeESNWoLa93JLQk5gjU6aO glT++tuBuAMkRjH4gJLShqa+8NIpwpmLWPhGhajg6RESKmDoEo8LQlIZ3fNry5LwYb xSpsXrCcu6w6ijxcTbqo33kT+/qMN9bzzE/zqRsQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+d56178c27a4710960820@syzkaller.appspotmail.com, =?UTF-8?q?C=C3=A1ssio=20Gabriel?= , Takashi Iwai Subject: [PATCH 7.0 001/307] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES Date: Mon, 4 May 2026 15:48:06 +0200 Message-ID: <20260504135142.874287887@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260504135142.814938198@linuxfoundation.org> References: <20260504135142.814938198@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 7.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cássio Gabriel commit 3c318f97dcc50b2e0556a1813bd6958678e881fd upstream. 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 Link: https://patch.msgid.link/20260415-usb-audio-uac2-rate-cap-v1-1-5ecbafc120d8@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/format.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -466,7 +466,7 @@ static int parse_uac2_sample_rate_range( nr_rates++; if (nr_rates >= MAX_NR_RATES) { usb_audio_err(chip, "invalid uac2 rates\n"); - break; + return nr_rates; } skip_rate: