fix off by one

src/vtstor.c

@@ -152,7 +152,7 @@ static int vtstor_set_key(struct vmod_vtstor_vtstor *vmi, struct vtstor_node *no
 {
 	CHECK_OBJ_NOTNULL(vmi, VMOD_VTSTOR_VTSTOR_MAGIC);
 	CHECK_OBJ_NOTNULL(node, VMOD_VTSTOR_NODE_MAGIC);
-	size_t size = strlen(s);
+	size_t size = strlen(s) + 1;
 	if(size > vmi->key_max)
 		return 0;
 	if(node->key) {
@@ -163,7 +163,7 @@ static int vtstor_set_key(struct vmod_vtstor_vtstor *vmi, struct vtstor_node *no
 		vmi->dealloc(vmi, &node->key);
 	}
 	node->key_capacity = vmi->alloc(vmi, size, &node->key);
-	if(node->key_capacity)
+	if(node->key_capacity >= size)
 		strcpy(node->key, s);
 	return node->key_capacity;
 }
@@ -172,7 +172,7 @@ static int vtstor_set_value(struct vmod_vtstor_vtstor *vmi, struct vtstor_node *
 {
 	CHECK_OBJ_NOTNULL(vmi, VMOD_VTSTOR_VTSTOR_MAGIC);
 	CHECK_OBJ_NOTNULL(node, VMOD_VTSTOR_NODE_MAGIC);
-	size_t size = strlen(s);
+	size_t size = strlen(s) + 1;
 	if(size > vmi->value_max)
 		return 0;
 	if(node->value) {
@@ -183,7 +183,7 @@ static int vtstor_set_value(struct vmod_vtstor_vtstor *vmi, struct vtstor_node *
 		vmi->dealloc(vmi, &node->value);
 	}
 	node->value_capacity = vmi->alloc(vmi, size, &node->value);
-	if(node->value_capacity)
+	if(node->value_capacity >= size)
 		strcpy(node->value, s);
 	return node->value_capacity;
 }