From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 65BF83546EA; Sat, 30 May 2026 17:46:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163183; cv=none; b=tdA4maRpPSP/WGl2FvzLlTVWyhQ0oWt7LEaexzd/MgwxccaqeR0Vvs/Mb/++CTmiFHyZUtrUUd4BhEV2cAkEne6ZvLEoO1tuVwpbPW4uNB4kvDJN4wV3aayn8RueosAJGmJE95czW0RcKUGPkp0AfmFGCMmb8QMEeoQYNiW8yJw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163183; c=relaxed/simple; bh=m4yIFz+U6vFoBl3n9F5sAOFLXV2saBgLLPdpzjj0qS0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=VTLsldrJaacCS08JGOMJiny0Xg6EQn8ALNKG0BFyv0FhLawReMOsPQIHpBdb0IAnYxjkcOEtdqRyYCUvR08VtmDZSAXIbBwK+8Yt/lkf53HviUkZiAnYVR/6lqhCYvUXXU/W4BGSrLzPFoih+QfaUgWQ4onipQti3L18BKsekYA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rJFv1GA+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rJFv1GA+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A58721F00898; Sat, 30 May 2026 17:46:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163182; bh=hUT0ocIqx/U2/3v6Xdl+r7Gzh5jWP30mOWbqNKVeQSQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rJFv1GA+CpacOfxm5Dym15UbSJBY1ZnBWne9BTzWtcXaKBb14YKzOO8KAayBFDWoj azpPheQ1z/1GMjx3MGyiJqb29QirUR+Qjc00pffpnw/+c5vANafnu+Hz646zFAsDCO dAyVodFNo9J13AlASOOByCSQ+3UESgdDFW7Sh4Gs= 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 5.15 181/776] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES Date: Sat, 30 May 2026 17:58:15 +0200 Message-ID: <20260530160245.174404965@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@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 5.15-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 @@ -461,7 +461,7 @@ 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: