[PATCH u-boot-marvell 07/16] tools: kwbimage: Check the return value of image_headersz_v1()

["Pali Rohár" <pali@kernel.org>]

Function image_headersz_v1() may return zero on fatal errors.
In this case the function already printed an error message.

Check the return value of image_headersz_v1() in kwbimage_generate(),
and exit on zero value with EXIT_FAILURE.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
---
 tools/kwbimage.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/kwbimage.c b/tools/kwbimage.c
index c21ed7b23fcf..7759a5f94098 100644
--- a/tools/kwbimage.c
+++ b/tools/kwbimage.c
@@ -1984,6 +1984,10 @@ static int kwbimage_generate(struct image_tool_params *params,
 
 	case 1:
 		alloc_len = image_headersz_v1(NULL);
+		if (!alloc_len) {
+			free(image_cfg);
+			exit(EXIT_FAILURE);
+		}
 		break;
 
 	default:
-- 
2.20.1