This is mostly cosmetics, as the error is impossible to hit.

CID 492358

Index: mrtparser.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpctl/mrtparser.c,v
diff -u -p -u -4 -r1.22 mrtparser.c
--- mrtparser.c	1 Feb 2024 11:37:10 -0000	1.22
+++ mrtparser.c	3 Nov 2025 10:23:04 -0000
@@ -823,8 +823,9 @@ mrt_aspath_inflate(struct ibuf *buf, uin
 	if ((data = malloc(len)) == NULL)
 		err(1, "malloc");
 	if (ibuf_get(asbuf, data, len) == -1) {
 		ibuf_free(asbuf);
+		free(data);
 		return (NULL);
 	}
 	ibuf_free(asbuf);
 	*newlen = len;