Index: head/sys/kern/kern_sysctl.c
===================================================================
--- head/sys/kern/kern_sysctl.c
+++ head/sys/kern/kern_sysctl.c
@@ -1023,12 +1023,16 @@
 {
 	int *name = (int *) arg1;
 	u_int namelen = arg2;
-	int error = 0;
+	int error;
 	struct sysctl_oid *oid;
 	struct sysctl_oid_list *lsp = &sysctl__children, *lsp2;
 	struct rm_priotracker tracker;
 	char buf[10];
 
+	error = sysctl_wire_old_buffer(req, 0);
+	if (error)
+		return (error);
+
 	SYSCTL_RLOCK(&tracker);
 	while (namelen) {
 		if (!lsp) {
@@ -1265,6 +1269,10 @@
 	struct rm_priotracker tracker;
 	int error;
 
+	error = sysctl_wire_old_buffer(req, 0);
+	if (error)
+		return (error);
+
 	SYSCTL_RLOCK(&tracker);
 	error = sysctl_find_oid(arg1, arg2, &oid, NULL, req);
 	if (error)
@@ -1294,6 +1302,10 @@
 	struct rm_priotracker tracker;
 	int error;
 
+	error = sysctl_wire_old_buffer(req, 0);
+	if (error)
+		return (error);
+
 	SYSCTL_RLOCK(&tracker);
 	error = sysctl_find_oid(arg1, arg2, &oid, NULL, req);
 	if (error)
@@ -1318,6 +1330,10 @@
 	struct sysctl_oid *oid;
 	struct rm_priotracker tracker;
 	int error;
+
+	error = sysctl_wire_old_buffer(req, 0);
+	if (error)
+		return (error);
 
 	SYSCTL_RLOCK(&tracker);
 	error = sysctl_find_oid(arg1, arg2, &oid, NULL, req);