Always check the length before returning the head or tail

rizinorg · Apr 23, 2024 · b2a4f6c · b2a4f6c
1 parent 34f1a9e
commit b2a4f6c
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/librz/include/rz_vector.h b/librz/include/rz_vector.h
@@ -292,12 +292,18 @@ static inline void **rz_pvector_data(RzPVector *vec) {
 // returns the first element of the vector
 static inline void *rz_pvector_head(RzPVector *vec) {
 	rz_return_val_if_fail(vec, NULL);
+	if (vec->v.len < 1) {
+		return NULL;
+	}
 	return ((void **)vec->v.a)[0];
 }
 
 // returns the last element of the vector
 static inline void *rz_pvector_tail(RzPVector *vec) {
 	rz_return_val_if_fail(vec, NULL);
+	if (vec->v.len < 1) {
+		return NULL;
+	}
 	return ((void **)vec->v.a)[vec->v.len - 1];
 }