From 4721e2214b5fd6eca48caea76afb1bad3148930f Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Tue, 6 Sep 2005 12:05:26 +1000
Subject: [PATCH] [PATCH] ppc64: poison initmem
Poison initmem after we free it so we catch use after free issues.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
arch/ppc64/mm/init.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/ppc64/mm/init.c b/arch/ppc64/mm/init.c
index b3b1e9c1770a..a14ab87df491 100644
--- a/arch/ppc64/mm/init.c
+++ b/arch/ppc64/mm/init.c
@@ -392,6 +392,7 @@ void free_initmem(void)
addr = (unsigned long)__init_begin;
for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
+ memset((void *)addr, 0xcc, PAGE_SIZE);
ClearPageReserved(virt_to_page(addr));
set_page_count(virt_to_page(addr), 1);
free_page(addr);
--
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