From 12ccc845a91305ba5e4498d3da9b4213a5080821 Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Thu, 15 Jan 2015 16:31:19 +0000
Subject: [PATCH] Map the sigcode page with MAP_INHERIT_COPY to make sure it
 isn't shared ater a fork.

ok deraadt@
---
 sys/kern/kern_exec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index cfddf50f4ac..2f92dc9f7a1 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_exec.c,v 1.154 2015/01/15 10:04:26 kettenis Exp $	*/
+/*	$OpenBSD: kern_exec.c,v 1.155 2015/01/15 16:31:19 kettenis Exp $	*/
 /*	$NetBSD: kern_exec.c,v 1.75 1996/02/09 18:59:28 christos Exp $	*/
 
 /*-
@@ -848,7 +848,7 @@ exec_sigcode_map(struct process *pr, struct emul *e)
 	uao_reference(e->e_sigobject);
 	if (uvm_map(&pr->ps_vmspace->vm_map, &pr->ps_sigcode, round_page(sz),
 	    e->e_sigobject, 0, 0, UVM_MAPFLAG(PROT_READ | PROT_EXEC,
-	    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_INHERIT_SHARE,
+	    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_INHERIT_COPY,
 	    MADV_RANDOM, UVM_FLAG_COPYONW))) {
 		uao_detach(e->e_sigobject);
 		return (ENOMEM);
-- 
2.20.1