--- sys/net/ip_mroute/ip_mroute.c	2026-07-18 00:45:16.868076229 +0000
+++ /tmp/opencode/fixsrc/sys/net/ip_mroute/ip_mroute.c	2026-10-24 13:14:50.721342845 +0000
@@ -1052,7 +1052,7 @@
 	    }
 	}
 	if (rt == NULL) {		/* no upcall, so make a new entry */
-	    rt = kmalloc(sizeof(*rt), M_MRTABLE, M_INTWAIT | M_NULLOK);
+	    rt = kmalloc(sizeof(*rt), M_MRTABLE, M_INTWAIT | M_NULLOK | M_ZERO);
 	    if (rt == NULL) {
 		    lwkt_reltoken(&mroute_token);
 		    return ENOBUFS;