linux-kernel - [PATCH] ASoC: wm_adsp: fix memleak in wm_adsp_buffer

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Message-Id: <20231204074158.12026-1-dinghao.liu@zju.edu.cn>
Date:   Mon,  4 Dec 2023 15:41:56 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Claudiu Beznea <claudiu.beznea@...on.dev>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        patches@...nsource.cirrus.com, linux-sound@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: wm_adsp: fix memleak in wm_adsp_buffer_populate

When wm_adsp_buffer_read() fails, we should free buf->regions.
Otherwise, the callers of wm_adsp_buffer_populate() will
directly free buf on failure, which makes buf->regions a leaked
memory.

Fixes: a792af69b08f ("ASoC: wm_adsp: Refactor compress stream initialisation")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 sound/soc/codecs/wm_adsp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 236b12b69ae5..c01e31175015 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -1451,12 +1451,12 @@ static int wm_adsp_buffer_populate(struct wm_adsp_compr_buf *buf)
 		ret = wm_adsp_buffer_read(buf, caps->region_defs[i].base_offset,
 					  &region->base_addr);
 		if (ret < 0)
-			return ret;
+			goto err;
 
 		ret = wm_adsp_buffer_read(buf, caps->region_defs[i].size_offset,
 					  &offset);
 		if (ret < 0)
-			return ret;
+			goto err;
 
 		region->cumulative_size = offset;
 
@@ -1467,6 +1467,10 @@ static int wm_adsp_buffer_populate(struct wm_adsp_compr_buf *buf)
 	}
 
 	return 0;
+
+err:
+	kfree(buf->regions);
+	return ret;
 }
 
 static void wm_adsp_buffer_clear(struct wm_adsp_compr_buf *buf)
-- 
2.17.1