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 50EB66FA0 for ; Mon, 16 Jan 2023 16:37:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAE9EC433F0; Mon, 16 Jan 2023 16:37:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887077; bh=ZaQD/WVS9g1OcjcjJYZXkfWsF/I/ER9r62lK5f8TOd0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=woMyAGN/tU3LEqpak5tV3thLq4aXk0QBZRm++k/OFHwcC04nbdQ8OjdBGtyWpHr8V de+d9RxUJPC8O493Ag6Vf8rfnWhoqsbvP2ENR73COR74wz4QCOy8moP3+VBhQ+UN80 RrxJYE5Jh6zv6KvJeArsomFyO+iDiW1jTHwuEwXQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mark Brown , Sasha Levin Subject: [PATCH 4.19 005/521] ASoC: ops: Check bounds for second channel in snd_soc_put_volsw_sx() Date: Mon, 16 Jan 2023 16:44:27 +0100 Message-Id: <20230116154847.493765089@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 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 From: Mark Brown [ Upstream commit 97eea946b93961fffd29448dcda7398d0d51c4b2 ] The bounds checks in snd_soc_put_volsw_sx() are only being applied to the first channel, meaning it is possible to write out of bounds values to the second channel in stereo controls. Add appropriate checks. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20220511134137.169575-2-broonie@kernel.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/soc-ops.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index 2faf95d4bb75..fbd46a737652 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -460,6 +460,12 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol, if (snd_soc_volsw_is_stereo(mc)) { val_mask = mask << rshift; val2 = (ucontrol->value.integer.value[1] + min) & mask; + + if (mc->platform_max && val2 > mc->platform_max) + return -EINVAL; + if (val2 > max) + return -EINVAL; + val2 = val2 << rshift; err = snd_soc_component_update_bits(component, reg2, val_mask, -- 2.35.1