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SubjectRe: [PATCH] riscv: Enable ELF-ASLR for riscv
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Hi Guo,

Le 7/9/20 à 12:38 AM, guoren@kernel.org a écrit :
> From: Guo Ren <guoren@linux.alibaba.com>
>
> Let riscv enable randomizes the stack, heap and binary images of
> ELF binaries. Seems it's ok at all after qemu & chip test and
> there is no founded side effect.
>
> So just simply select ARCH_HAS_ELF_RANDOMIZE :)
>
> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> Cc: Palmer Dabbelt <palmerdabbelt@google.com>
> Cc: Paul Walmsley <paul.walmsley@sifive.com>
> Cc: Zong Li <zong.li@sifive.com>
> Cc: Greentime Hu <green.hu@gmail.com>
> ---
> arch/riscv/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 91bfc6c..eed6647 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -20,6 +20,7 @@ config RISCV
> select ARCH_HAS_GIGANTIC_PAGE
> select ARCH_HAS_MMIOWB
> select ARCH_HAS_PTE_SPECIAL
> + select ARCH_HAS_ELF_RANDOMIZE
> select ARCH_HAS_SET_DIRECT_MAP
> select ARCH_HAS_SET_MEMORY
> select ARCH_HAS_STRICT_KERNEL_RWX if MMU
>

Actually it is already the case: ARCH_HAS_ELF_RANDOMIZE is already
selected by ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT.

Thanks,

Alex

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