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| author | Jason Cooper <jason@lakedaemon.net> | 2016-10-11 13:53:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 15:06:32 -0700 |
| commit | c984cbf2e34cd622b5531f776029f7b23ff17e50 (patch) | |
| tree | e339762b3e16ce389f981cd57de6f7b859cbae1a /arch/arm/kernel/process.c | |
| parent | 9c6f0902a55226b08b9703408f04b258b9afa0bc (diff) | |
| download | linux-stable-c984cbf2e34cd622b5531f776029f7b23ff17e50.tar.gz linux-stable-c984cbf2e34cd622b5531f776029f7b23ff17e50.tar.bz2 linux-stable-c984cbf2e34cd622b5531f776029f7b23ff17e50.zip | |
ARM: use simpler API for random address requests
Currently, all callers to randomize_range() set the length to 0 and
calculate end by adding a constant to the start address. We can simplify
the API to remove a bunch of needless checks and variables.
Use the new randomize_addr(start, range) call to set the requested
address.
Link: http://lkml.kernel.org/r/20160803233913.32511-4-jason@lakedaemon.net
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Russell King - ARM Linux" <linux@arm.linux.org.uk>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/kernel/process.c')
| -rw-r--r-- | arch/arm/kernel/process.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 612eb530f33f..91d2d5b01414 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -318,8 +318,7 @@ unsigned long get_wchan(struct task_struct *p) unsigned long arch_randomize_brk(struct mm_struct *mm) { - unsigned long range_end = mm->brk + 0x02000000; - return randomize_range(mm->brk, range_end, 0) ? : mm->brk; + return randomize_page(mm->brk, 0x02000000); } #ifdef CONFIG_MMU |