diff --git a/lib/libjail/jail.c b/lib/libjail/jail.c
index 6a35cdc6dde5..3e0c2a0f98cb 100644
--- a/lib/libjail/jail.c
+++ b/lib/libjail/jail.c
@@ -262,7 +262,10 @@ jailparam_all(struct jailparam **jpp)
 			goto error;
 		mib1[1] = 2;
 	}
-	jp = reallocarray(jp, njp, sizeof(*jp));
+	/* Just return the untrimmed buffer if reallocarray() somehow fails. */
+	tjp = reallocarray(jp, njp, sizeof(*jp));
+	if (tjp != NULL)
+		jp = tjp;
 	*jpp = jp;
 	return (njp);