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ARM: 6877/1: the ADDR_NO_RANDOMIZE personality flag should be honored with mmap()
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
authored by
Nicolas Pitre
and committed by
Russell King
df5419a9
b025a3f8
+3
-1
+3
-1
arch/arm/mm/mmap.c
+3
-1
arch/arm/mm/mmap.c
···
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#include <linux/shm.h>
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#include <linux/sched.h>
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#include <linux/io.h>
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#include <linux/personality.h>
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#include <linux/random.h>
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#include <asm/cputype.h>
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#include <asm/system.h>
···
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mm->cached_hole_size = 0;
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}
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/* 8 bits of randomness in 20 address space bits */
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if (current->flags & PF_RANDOMIZE)
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if ((current->flags & PF_RANDOMIZE) &&
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!(current->personality & ADDR_NO_RANDOMIZE))
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addr += (get_random_int() % (1 << 8)) << PAGE_SHIFT;
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