[PATCH 1/2] ARM: the ADDR_NO_RANDOMIZE personality flag should be honored with mmap()

[sboyd@codeaurora.org (Stephen Boyd)]

On 04/07/2011 07:51 PM, Nicolas Pitre wrote:
> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
> ---

Is this a stable candidate?

>  arch/arm/mm/mmap.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
> index afe209e..74be05f 100644
> --- a/arch/arm/mm/mmap.c
> +++ b/arch/arm/mm/mmap.c
> @@ -7,6 +7,7 @@
>  #include <linux/shm.h>
>  #include <linux/sched.h>
>  #include <linux/io.h>
> +#include <linux/personality.h>
>  #include <linux/random.h>
>  #include <asm/cputype.h>
>  #include <asm/system.h>
> @@ -82,7 +83,8 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
>  	        mm->cached_hole_size = 0;
>  	}
>  	/* 8 bits of randomness in 20 address space bits */
> -	if (current->flags & PF_RANDOMIZE)
> +	if ((current->flags & PF_RANDOMIZE) &&
> +	    !(current->personality & ADDR_NO_RANDOMIZE))
>  		addr += (get_random_int() % (1 << 8)) << PAGE_SHIFT;
>  
>  full_search:


-- 
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