[PATCH] Check find_vma return code in make_pages_present()

[Dave Jones]

It can return NULL, so check for it.

Spotted with the source checker from Coverity.com.

Signed-off-by: Dave Jones <davej@xxxxxxxxxx>


diff -urpN --exclude-from=/home/davej/.exclude bk-linus/mm/memory.c linux-2.6/mm/memory.c
--- bk-linus/mm/memory.c	2004-08-24 00:02:41.000000000 +0100
+++ linux-2.6/mm/memory.c	2004-09-01 13:31:18.000000000 +0100
@@ -1744,6 +1744,8 @@ int make_pages_present(unsigned long add
 	struct vm_area_struct * vma;
 
 	vma = find_vma(current->mm, addr);
+	if (!vma)
+		return -1;
 	write = (vma->vm_flags & VM_WRITE) != 0;
 	if (addr >= end)
 		BUG();
-
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