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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-06-30 11:00:01 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-06-30 11:00:01 +0100 |
| commit | fc4978b796e5e52ab3a709495a968199afe0a108 (patch) | |
| tree | 102c74707940214f3c9810dadaf62d0d378a7a8c /arch/arm/mm | |
| parent | 3260e5293727f16ffdce9a6a6203fd9a6b149e58 (diff) | |
| parent | df0698be14c6683606d5df2d83e3ae40f85ed0d9 (diff) | |
Merge git://git.linaro.org/nico/arm_security into devel-stable
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/mmap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index f5abc51c5a0..4f5b39687df 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/random.h> #include <asm/cputype.h> #include <asm/system.h> @@ -80,6 +81,9 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, start_addr = addr = TASK_UNMAPPED_BASE; mm->cached_hole_size = 0; } + /* 8 bits of randomness in 20 address space bits */ + if (current->flags & PF_RANDOMIZE) + addr += (get_random_int() % (1 << 8)) << PAGE_SHIFT; full_search: if (do_align) |