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Commit f94f7434 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Cc: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Steven Price <steven.price@arm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4afd58e1

arch/mips/mm/init.c

+0 −8
Original line number Diff line number Diff line
@@ -504,14 +504,6 @@ void free_init_pages(const char *what, unsigned long begin, unsigned long end) 
	printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);

}



#ifdef CONFIG_BLK_DEV_INITRD

void free_initrd_mem(unsigned long start, unsigned long end)

{

	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,

			   "initrd");

}

#endif



void (*free_init_pages_eva)(void *begin, void *end) = NULL;



void __ref free_initmem(void)

arch/s390/mm/init.c

+0 −8
Original line number Diff line number Diff line
@@ -157,14 +157,6 @@ void free_initmem(void) 
	free_initmem_default(POISON_FREE_INITMEM);

}



#ifdef CONFIG_BLK_DEV_INITRD

void __init free_initrd_mem(unsigned long start, unsigned long end)

{

	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,

			   "initrd");

}

#endif



unsigned long memory_block_size_bytes(void)

{

	/*

arch/sparc/mm/init_32.c

+0 −8
Original line number Diff line number Diff line
@@ -299,14 +299,6 @@ void free_initmem (void) 
	free_initmem_default(POISON_FREE_INITMEM);

}



#ifdef CONFIG_BLK_DEV_INITRD

void free_initrd_mem(unsigned long start, unsigned long end)

{

	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,

			   "initrd");

}

#endif



void sparc_flush_page_to_ram(struct page *page)

{

	unsigned long vaddr = (unsigned long)page_address(page);

arch/sparc/mm/init_64.c

+0 −8
Original line number Diff line number Diff line
@@ -2572,14 +2572,6 @@ void free_initmem(void) 
	}

}



#ifdef CONFIG_BLK_DEV_INITRD

void free_initrd_mem(unsigned long start, unsigned long end)

{

	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,

			   "initrd");

}

#endif



pgprot_t PAGE_KERNEL __read_mostly;

EXPORT_SYMBOL(PAGE_KERNEL);

init/initramfs.c

+2 −1
Original line number Diff line number Diff line
@@ -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