ASoC: SOF: amd: Fix memory leak in amd_sof_acp_probe()

Driver uses kasprintf() to initialize fw_{code,data}_bin members of
struct acp_dev_data, but kfree() is never called to deallocate the
memory, which results in a memory leak.

Fix the issue by switching to devm_kasprintf(). Additionally, ensure the
allocation was successful by checking the pointer validity.

Fixes: f7da8800 ("ASoC: SOF: amd: Enable signed firmware image loading for Vangogh platform")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Link: https://msgid.link/r/20231219030728.2431640-6-cristian.ciocaltea@collabora.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/amd/acp.c

@@ -561,17 +561,27 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 	adata->signed_fw_image = false;
 	dmi_id = dmi_first_match(acp_sof_quirk_table);
 	if (dmi_id && dmi_id->driver_data) {
-		adata->fw_code_bin = kasprintf(GFP_KERNEL, "%s/sof-%s-code.bin",
-					       plat_data->fw_filename_prefix,
-					       chip->name);
-		adata->fw_data_bin = kasprintf(GFP_KERNEL, "%s/sof-%s-data.bin",
-					       plat_data->fw_filename_prefix,
-					       chip->name);
-		adata->signed_fw_image = dmi_id->driver_data;
+		adata->fw_code_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
+						    "%s/sof-%s-code.bin",
+						    plat_data->fw_filename_prefix,
+						    chip->name);
+		if (!adata->fw_code_bin) {
+			ret = -ENOMEM;
+			goto free_ipc_irq;
+		}
+
+		adata->fw_data_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
+						    "%s/sof-%s-data.bin",
+						    plat_data->fw_filename_prefix,
+						    chip->name);
+		if (!adata->fw_data_bin) {
+			ret = -ENOMEM;
+			goto free_ipc_irq;
+		}
 
-		dev_dbg(sdev->dev, "fw_code_bin:%s, fw_data_bin:%s\n", adata->fw_code_bin,
-			adata->fw_data_bin);
+		adata->signed_fw_image = dmi_id->driver_data;
 	}
+
 	adata->enable_fw_debug = enable_fw_debug;
 	acp_memory_init(sdev);