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Commit 4721e221 authored by Anton Blanchard's avatar Anton Blanchard Committed by Paul Mackerras
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[PATCH] ppc64: poison initmem 



Poison initmem after we free it so we catch use after free issues.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 2f4cf721

arch/ppc64/mm/init.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -392,6 +392,7 @@ void free_initmem(void) 




	addr = (unsigned long)__init_begin;

	addr = (unsigned long)__init_begin;

	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {

	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {

		memset((void *)addr, 0xcc, PAGE_SIZE);

		ClearPageReserved(virt_to_page(addr));

		ClearPageReserved(virt_to_page(addr));

		set_page_count(virt_to_page(addr), 1);

		set_page_count(virt_to_page(addr), 1);

		free_page(addr);

		free_page(addr);