linux-kernel - [PATCH -next] ASoC: SOF: topology: Fix memory leak in sof_control

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Date:   Fri, 18 Mar 2022 10:16:16 +0800
From:   Yu Liao <liaoyu15@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <ranjani.sridharan@...ux.intel.com>
CC:     <broonie@...nel.org>, <liaoyu15@...wei.com>, <liwei391@...wei.com>
Subject: [PATCH -next] ASoC: SOF: topology: Fix memory leak in sof_control_load()

scontrol doesn't get freed when kstrdup returns NULL.
Fix by free iscontrol in that case.

     scontrol = kzalloc(sizeof(*scontrol), GFP_KERNEL);
     if (!scontrol)
         return -ENOMEM;

     scontrol->name = kstrdup(hdr->name, GFP_KERNEL);
     if (!scontrol->name)
         return -ENOMEM;

Signed-off-by: Yu Liao <liaoyu15@...wei.com>
---
 sound/soc/sof/topology.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index 367fbe2d5b31..88f34f43d693 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -905,8 +905,10 @@ static int sof_control_load(struct snd_soc_component *scomp, int index,
 		return -ENOMEM;
 
 	scontrol->name = kstrdup(hdr->name, GFP_KERNEL);
-	if (!scontrol->name)
+	if (!scontrol->name) {
+		kfree(scontrol);
 		return -ENOMEM;
+	}
 
 	scontrol->scomp = scomp;
 	scontrol->access = kc->access;
-- 
2.25.1