From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Sat, 27 May 2023 06:18:28 +0000 (+0200)
Subject: efi_loader: check return value of part_get_info()
X-Git-Url: http://git.dujemihanovic.xyz/html/index.html?a=commitdiff_plain;h=1becdfcdc1eefecc061e34d7cc4eb92b403c5c4e;p=u-boot.git

efi_loader: check return value of part_get_info()

part_get_info() may return an error code. Check it.
Update function description of dp_part_node().

Addresses-Coverity-ID: 184067 ("Unchecked return value")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 71923b1127..04ebb449ca 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -843,12 +843,17 @@ static unsigned dp_part_size(struct blk_desc *desc, int part)
  * @buf		buffer to which the device path is written
  * @desc	block device descriptor
  * @part	partition number, 0 identifies a block device
+ *
+ * Return:	pointer to position after the node
  */
 static void *dp_part_node(void *buf, struct blk_desc *desc, int part)
 {
 	struct disk_partition info;
+	int ret;
 
-	part_get_info(desc, part, &info);
+	ret = part_get_info(desc, part, &info);
+	if (ret < 0)
+		return buf;
 
 	if (desc->part_type == PART_TYPE_ISO) {
 		struct efi_device_path_cdrom_path *cddp = buf;