Messages in this thread Patch in this message | | | From | Jason Cooper <> | Subject | [PATCH v3 4/7] arm64: Use simpler API for random address requests | Date | Wed, 3 Aug 2016 23:39:10 +0000 |
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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.
Signed-off-by: Jason Cooper <jason@lakedaemon.net> Acked-by: Will Deacon <will.deacon@arm.com> --- Changes from v2: - s/randomize_addr/randomize_page/ (Kees Cook)
arch/arm64/kernel/process.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 6cd2612236dc..6ac2950ffb78 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -374,12 +374,8 @@ unsigned long arch_align_stack(unsigned long sp) unsigned long arch_randomize_brk(struct mm_struct *mm) { - unsigned long range_end = mm->brk; - if (is_compat_task()) - range_end += 0x02000000; + return randomize_page(mm->brk, 0x02000000); else - range_end += 0x40000000; - - return randomize_range(mm->brk, range_end, 0) ? : mm->brk; + return randomize_page(mm->brk, 0x40000000); } -- 2.9.2
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