[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>

diff --git a/arch/ppc64/mm/init.c b/arch/ppc64/mm/init.c
index b3b1e9c1770a412d84cee67a1dac090e6a642586..a14ab87df49114dbc9d02566b5014d4e91d0b939 100644 (file)
--- 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);