From f94f7434cbbb02f7eb55ed5ad66284023c47968f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 13 May 2019 17:18:37 -0700 Subject: initramfs: poison freed initrd memory Various architectures including x86 poison the freed initrd memory. Do the same in the generic free_initrd_mem implementation and switch a few more architectures that are identical to the generic code over to it now. Link: http://lkml.kernel.org/r/20190213174621.29297-9-hch@lst.de Signed-off-by: Christoph Hellwig Acked-by: Mike Rapoport Cc: Catalin Marinas [arm64] Cc: Geert Uytterhoeven [m68k] Cc: Steven Price Cc: Alexander Viro Cc: Guan Xuetao Cc: Russell King Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- init/initramfs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'init') diff --git a/init/initramfs.c b/init/initramfs.c index fcb759a106be..435a428c2af1 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -529,7 +529,8 @@ extern unsigned long __initramfs_size; void __weak free_initrd_mem(unsigned long start, unsigned long end) { - free_reserved_area((void *)start, (void *)end, -1, "initrd"); + free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, + "initrd"); } #ifdef CONFIG_KEXEC_CORE -- cgit v1.2.3