ASoC: wm_adsp: fix memleak in wm_adsp_buffer_populate

[ Upstream commit 29046a78a3c0a1f8fa0427f164caa222f003cf5b ]

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@zju.edu.cn>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231204074158.12026-1-dinghao.liu@zju.edu.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index d1b9238..cb654f1 100644 (file)
--- 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)