[PATCH] efi_loader: variable: check a return value of uuid__str_to_bin()

[AKASHI Takahiro]

The only error case is that a given UUID is in wrong format.
So just return EFI_INVALID_PARAMETER here.

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
Reported-by: Coverity (CID 300333)
---
 lib/efi_loader/efi_variable.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index f40b194b13bf..38d21b9314f2 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -866,7 +866,10 @@ static efi_status_t parse_uboot_variable(char *variable,
 	/* guid */
 	c = *(name - 1);
 	*(name - 1) = '\0'; /* guid need be null-terminated here */
-	uuid_str_to_bin(guid, (unsigned char *)vendor, UUID_STR_FORMAT_GUID);
+	if (uuid_str_to_bin(guid, (unsigned char *)vendor,
+			    UUID_STR_FORMAT_GUID))
+		/* The only error would be EINVAL. */
+		return EFI_INVALID_PARAMETER;
 	*(name - 1) = c;
 
 	/* attributes */
-- 
2.25.2