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efi_loader: check return value of part_get_info()

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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>
This commit is contained in:
Heinrich Schuchardt 2023-05-27 08:18:28 +02:00
parent 5a2d5cbd31
commit 1becdfcdc1
1 changed files with 6 additions and 1 deletions
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7
lib/efi_loader/efi_device_path.c
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@ -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;