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Commit df5419a9 authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Russell King
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ARM: 6877/1: the ADDR_NO_RANDOMIZE personality flag should be honored with mmap() 



Signed-off-by: default avatarNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b025a3f8

arch/arm/mm/mmap.c

+3 −1
Original line number Diff line number Diff line
@@ -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;



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