ASoC: sma1307: Add NULL check in sma1307_setting_loaded()

Commit Message

Chenyuan Yang March 11, 2025, 1:57 a.m. UTC

All varibale allocated by kzalloc and devm_kzalloc could be NULL.
Multiple pointer checks and their cleanup are added.

This issue is found by our static analysis tool

Signed-off-by: Chenyuan Yang <[e-mail]>
---
 sound/soc/codecs/sma1307.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

Patch

diff --git a/sound/soc/codecs/sma1307.c b/sound/soc/codecs/sma1307.c
index 480bcea48541..b9d8136fe3dc 100644
--- a/sound/soc/codecs/sma1307.c
+++ b/sound/soc/codecs/sma1307.c
@@ -1728,6 +1728,11 @@  static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *fil
 	}
 
 	data = kzalloc(fw->size, GFP_KERNEL);
+	if (!data) {
+		release_firmware(fw);
+		sma1307->set.status = false;
+		return;
+	}
 	size = fw->size >> 2;
 	memcpy(data, fw->data, fw->size);
 
@@ -1741,6 +1746,12 @@  static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *fil
 	sma1307->set.header = devm_kzalloc(sma1307->dev,
 					   sma1307->set.header_size,
 					   GFP_KERNEL);
+	if (!sma1307->set.header) {
+		kfree(data);
+		sma1307->set.status = false;
+		return;
+	}
+
 	memcpy(sma1307->set.header, data,
 	       sma1307->set.header_size * sizeof(int));
 
@@ -1756,6 +1767,13 @@  static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *fil
 	sma1307->set.def
 	    = devm_kzalloc(sma1307->dev,
 			   sma1307->set.def_size * sizeof(int), GFP_KERNEL);
+	if (!sma1307->set.def) {
+		kfree(data);
+		kfree(sma1307->set.header);
+		sma1307->set.status = false;
+		return;
+	}
+
 	memcpy(sma1307->set.def,
 	       &data[sma1307->set.header_size],
 	       sma1307->set.def_size * sizeof(int));
@@ -1768,6 +1786,16 @@  static void sma1307_setting_loaded(struct sma1307_priv *sma1307, const char *fil
 		    = devm_kzalloc(sma1307->dev,
 				   sma1307->set.mode_size * 2 * sizeof(int),
 				   GFP_KERNEL);
+		if (!sma1307->set.mode_set[i]) {
+			kfree(data);
+			kfree(sma1307->set.header);
+			kfree(sma1307->set.def);
+			for (int j = 0; j < i; j++)
+				kfree(sma1307->set.mode_set[j]);
+			sma1307->set.status = false;
+			return;
+		}
+
 		for (int j = 0; j < sma1307->set.mode_size; j++) {
 			sma1307->set.mode_set[i][2 * j]
 			    = data[offset + ((num_mode + 1) * j)];