The patch titled
Subject: init: free_initmem: poison freed init memory
has been added to the -mm tree. Its filename is
init-free_initmem-poison-freed-init-memory.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/init-free_initmem-poison-freed-init-memory.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/init-free_initmem-poison-freed-init-memory.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: init: free_initmem: poison freed init memory
Various architectures including x86 poison the freed init memory. Do the
same in the generic free_initmem implementation and switch sparc32
architecture that is identical to the generic code over to it now.
Link: http://lkml.kernel.org/r/1550515285-17446-4-git-send-email-rppt@xxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Richard Kuo <rkuo@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/mm/init_32.c | 5 -----
init/main.c | 2 +-
2 files changed, 1 insertion(+), 6 deletions(-)
--- a/arch/sparc/mm/init_32.c~init-free_initmem-poison-freed-init-memory
+++ a/arch/sparc/mm/init_32.c
@@ -294,11 +294,6 @@ void __init mem_init(void)
mem_init_print_info(NULL);
}
-void free_initmem (void)
-{
- free_initmem_default(POISON_FREE_INITMEM);
-}
-
void sparc_flush_page_to_ram(struct page *page)
{
unsigned long vaddr = (unsigned long)page_address(page);
--- a/init/main.c~init-free_initmem-poison-freed-init-memory
+++ a/init/main.c
@@ -1063,7 +1063,7 @@ static inline void mark_readonly(void)
void __weak free_initmem(void)
{
- free_initmem_default(-1);
+ free_initmem_default(POISON_FREE_INITMEM);
}
static int __ref kernel_init(void *unused)
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
init-provide-a-generic-free_initmem-implementation.patch
hexagon-switch-over-to-generic-free_initmem.patch
init-free_initmem-poison-freed-init-memory.patch
riscv-switch-over-to-generic-free_initmem.patch
