[PATCH u-boot-mvebu 06/31] tools: kwbimage: Don't crash when binary file name does not contain '/'

[Marek Behún]

From: Pali Rohár <pali at kernel.org>

In the case when the file name is specified relative to the current
working directory, it does not contain '/' character and strrchr()
returns NULL.

The following strcmp() function then crashes on NULL pointer
dereference.

Signed-off-by: Pali Rohár <pali at kernel.org>
Reviewed-by: Marek Behún <marek.behun at nic.cz>
---
 tools/kwbimage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/kwbimage.c b/tools/kwbimage.c
index 44bf5ee026..c08fb678d4 100644
--- a/tools/kwbimage.c
+++ b/tools/kwbimage.c
@@ -1277,7 +1277,7 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
 	if (e) {
 		char *s = strrchr(e->binary.file, '/');
 
-		if (strcmp(s, "/binary.0") == 0)
+		if (s && strcmp(s, "/binary.0") == 0)
 			main_hdr->destaddr = cpu_to_le32(params->addr);
 	}
 
-- 
2.31.1