[PATCH] swap 06/13 wrap below vm_start

[Hugh Dickins]

objrmap must check lest address wrapped below vma->vm_start.

--- swap05/mm/rmap.c	Tue Mar 25 20:43:40 2003
+++ swap06/mm/rmap.c	Tue Mar 25 20:43:51 2003
@@ -100,12 +100,8 @@
 	unsigned long address;
 
 	loffset = (page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT));
-	if (loffset < vma->vm_pgoff)
-		goto out;
-
 	address = vma->vm_start + ((loffset - vma->vm_pgoff) << PAGE_SHIFT);
-
-	if (address >= vma->vm_end)
+	if (address < vma->vm_start || address >= vma->vm_end)
 		goto out;
 
 	pgd = pgd_offset(mm, address);