From 608dd9d157c752796f552d21c6e9d8296abd7990 Mon Sep 17 00:00:00 2001
From: gerhard <gerhard@openbsd.org>
Date: Tue, 20 Jun 2017 14:11:46 +0000
Subject: [PATCH] Do not touch file pointers for which FILE_IS_USABLE() is
 false. They're might not be fully constructed.

ok mpi@ deraadt@ bluhm@
---
 sys/kern/kern_sysctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 16d1d279036..7b71ccfde26 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_sysctl.c,v 1.328 2017/06/14 03:00:40 dlg Exp $	*/
+/*	$OpenBSD: kern_sysctl.c,v 1.329 2017/06/20 14:11:46 gerhard Exp $	*/
 /*	$NetBSD: kern_sysctl.c,v 1.17 1996/05/20 17:49:05 mrg Exp $	*/
 
 /*-
@@ -1327,6 +1327,7 @@ sysctl_file(int *name, u_int namelen, char *where, size_t *sizep,
 		FREF(fp);
 		do {
 			if (fp->f_count > 1 && /* 0, +1 for our FREF() */
+			    FILE_IS_USABLE(fp) &&
 			    (arg == 0 || fp->f_type == arg)) {
 				int af, skip = 0;
 				if (arg == DTYPE_SOCKET && fp->f_type == arg) {
-- 
2.20.1