From 6e53f60e2c2aea57ecee63ff46dbc8ce0f617989 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Tue, 25 Jan 2005 22:13:10 +0000
Subject: [PATCH] Added support for protection flag B_USER_CLONEABLE_AREA.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11045 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kernel/core/vm/vm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/kernel/core/vm/vm.c b/src/kernel/core/vm/vm.c
index 176f48e11f..77273d6d29 100755
--- a/src/kernel/core/vm/vm.c
+++ b/src/kernel/core/vm/vm.c
@@ -1127,8 +1127,10 @@ vm_clone_area(aspace_id aid, const char *name, void **address, uint32 addressSpe
 		return ERR_VM_INVALID_REGION;
 	}
 
-	if (sourceArea->aspace == kernel_aspace && aspace != kernel_aspace) {
-		// kernel areas must not be cloned in userland
+	if (sourceArea->aspace == kernel_aspace && aspace != kernel_aspace
+		&& !(sourceArea->protection & B_USER_CLONEABLE_AREA)) {
+		// kernel areas must not be cloned in userland, unless explicitly
+		// declared user-cloneable upon construction
 		status = B_NOT_ALLOWED;
 	} else {
 		vm_cache_acquire_ref(sourceArea->cache_ref, true);