From adf3b19660cfaab89f64a245c982bf61dd6f53e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Fri, 8 Oct 2004 23:19:33 +0000
Subject: [PATCH] resize_area() must unmap the area beyond the new size, if the
 area has shrinked.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9267 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kernel/core/vm/vm.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/kernel/core/vm/vm.c b/src/kernel/core/vm/vm.c
index 60c6f799d8..e70863d23d 100755
--- a/src/kernel/core/vm/vm.c
+++ b/src/kernel/core/vm/vm.c
@@ -2592,6 +2592,15 @@ resize_area(area_id areaID, size_t newSize)
 		}
 
 		current->size = newSize;
+
+		// we also need to unmap all pages beyond the new size, if the area has shrinked
+		if (newSize < oldSize) {
+			vm_translation_map *map = &current->aspace->translation_map;
+
+			map->ops->lock(map);
+			map->ops->unmap(map, current->base + newSize, current->base + oldSize - 1);
+			map->ops->unlock(map);
+		}
 	}
 
 	if (failed) {
@@ -2601,7 +2610,7 @@ resize_area(area_id areaID, size_t newSize)
 
 		goto err;
 	}
-
+		
 	vm_cache_resize(cache, newSize);
 	mutex_unlock(&cache->lock);