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 0D6391CAA6C; Sat, 30 May 2026 16:52:08 +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=1780159930; cv=none; b=grwR0aYgHmMF28RJtsMl4Us/YVRqq2WnlAytih5/mPBX3wJZOMvB6ftdtwuZghIadEjZRnbQPi3sWqVE71tmEMjOc9fYrKafqVgGByV83GjZo+r7XVXkug+4Ajd1KDgTtH9NZmd0rIUt5WpUNSqLRUpxp5Fdpsus1T/Kjd4Y4Io= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780159930; c=relaxed/simple; bh=2LRlCed4DZegtsZ3J0k8byvbCsBmGIA8M6meGBXoYpA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=QyfT6kMOOcFANQ733Jw+NopOsnrA4qT7cdWB1ERZmqln+qstu6yX311zsHJk+HyPCTZyUFrAQQyacyfrt7cFjTJTHJUD9b1AASceaYuJUJ1Txos8MVnjh0czMbEqPPVJhAHYhrxh6gnaUAtJYKrgcyAiafdyQz6Y8P+81XyrO/M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hs0RpH8g; 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="hs0RpH8g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1AA81F00893; Sat, 30 May 2026 16:52:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780159928; bh=W0i6uj+qWDd8c1pPJiwehCeTda+C+gkR4632DlIEq/Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hs0RpH8gOnZourPFEuIQZy2dufPJECAZTLTJHNRXfIuxpZisxBFQPhBDpxAoHtvTS URLH5MT5aJhrEov1h3CjwNxknGB889Meq/zuFUKnIR779AqumpklhbIIoJ3kQ4nkD5 5iRAVqSS+RJzq8+/Wd7tju08hbFo+yh6E7odmxR8= 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 6.1 159/969] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES Date: Sat, 30 May 2026 17:54:43 +0200 Message-ID: <20260530160304.922953470@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160300.485627683@linuxfoundation.org> References: <20260530160300.485627683@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 6.1-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: