[RFC PATCH 2/2] ARM: kexec: Check segment memory addresses

[Simon Horman]

On Thu, Sep 06, 2012 at 02:35:03PM +0100, Matthew Leach wrote:
> Ensure that the memory regions that are set within the segments
> correspond to physical contiguous memory regions.
> 
> Cc: Simon Horman <horms at verge.net.au>
> Reviewed-by: Will Deacon <will.deacon at arm.com>
> Signed-off-by: Matthew Leach <matthew.leach at arm.com>
> ---

Reviewed-by: Simon Horman <horms at verge.net.au>

>  arch/arm/kernel/machine_kexec.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
> index a6bbc0f..524139a 100644
> --- a/arch/arm/kernel/machine_kexec.c
> +++ b/arch/arm/kernel/machine_kexec.c
> @@ -8,6 +8,7 @@
>  #include <linux/reboot.h>
>  #include <linux/io.h>
>  #include <linux/irq.h>
> +#include <linux/memblock.h>
>  #include <asm/pgtable.h>
>  #include <linux/of_fdt.h>
>  #include <asm/pgalloc.h>
> @@ -42,6 +43,12 @@ int machine_kexec_prepare(struct kimage *image)
>  	for (i = 0; i < image->nr_segments; i++) {
>  		current_segment = &image->segment[i];
>  
> +		err = memblock_is_region_memory(current_segment->mem,
> +						current_segment->memsz);
> +		if (err)
> +			return - EINVAL;
> +
> +
>  		err = get_user(header, (__be32*)current_segment->buf);
>  		if (err)
>  			return err;
> -- 
> 1.7.12
>