linux-kernel - [PATCH 02/10] ASoC: qcom: q6apm-lpass-dai: Fix multiple graph opens

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260205171411.34908-3-srinivas.kandagatla@oss.qualcomm.com>
Date: Thu,  5 Feb 2026 12:14:03 -0500
From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
To: broonie@...nel.org
Cc: lgirdwood@...il.com, robh@...nel.org, krzk+dt@...nel.org,
        cnor+dt@...nel.org, srini@...nel.org, perex@...ex.cz, tiwai@...e.com,
        alexey.klimov@...aro.org, mohammad.rafi.shaik@....qualcomm.com,
        quic_wcheng@...cinc.com, johan@...nel.org,
        dmitry.baryshkov@....qualcomm.com, konrad.dybcio@....qualcomm.com,
        linux-arm-msm@...r.kernel.org, linux-sound@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>,
        Stable@...r.kernel.org
Subject: [PATCH 02/10] ASoC: qcom: q6apm-lpass-dai: Fix multiple graph opens

As prepare can be called mulitple times, this can result in multiple
graph opens for playback path, fix this by checking if there is already a
graph instance.

This will result in a memory leaks, fix this by adding a check before
opening.

Fixes: be1fae62cf25 ("ASoC: q6apm-lpass-dai: close graph on prepare errors")
Cc: Stable@...r.kernel.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
---
 sound/soc/qcom/qdsp6/q6apm-lpass-dais.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
index 528756f1332b..f68d4b4974f3 100644
--- a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
+++ b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
@@ -181,7 +181,7 @@ static int q6apm_lpass_dai_prepare(struct snd_pcm_substream *substream, struct s
 	 * It is recommend to load DSP with source graph first and then sink
 	 * graph, so sequence for playback and capture will be different
 	 */
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && dai_data->graph[dai->id] == NULL) {
 		graph = q6apm_graph_open(dai->dev, NULL, dai->dev, graph_id);
 		if (IS_ERR(graph)) {
 			dev_err(dai->dev, "Failed to open graph (%d)\n", graph_id);
-- 
2.47.3