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>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index afe209e1e1f8..74be05f3e03a 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;
 
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