WebP: Fix memory leak in test and avoid possible memory leak if size is not correct (ie. passing 0 size will leak). Min size is the WebP sign (3x32bits)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/gd_webp.c b/src/gd_webp.c
index d887b71..1622310 100644
--- a/src/gd_webp.c
+++ b/src/gd_webp.c
@@ -356,6 +356,16 @@ BGD_DECLARE(void *) gdImageWebpPtr (gdImagePtr im, int *size)
 BGD_DECLARE(void *) gdImageWebpPtrEx (gdImagePtr im, int *size, int quality)
 {
 	void *rv;
+
+	/* 
+		WebP Header is 3x32bits
+		RIFF
+		filesize
+		WEBP
+	*/
+	if (size < 96) {
+		return NULL;
+	}
 	gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
 	if (out == NULL) {
 		return NULL;