linux-kernel - Re: [PATCH] arm64: kasan: instrument user memory access API

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Date:	Fri, 27 May 2016 14:02:08 +0300
From:	Andrey Ryabinin <aryabinin@...tuozzo.com>
To:	Yang Shi <yang.shi@...aro.org>, <will.deacon@....com>,
	<catalin.marinas@....com>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mm@...ck.org>,
	<linaro-kernel@...ts.linaro.org>
Subject: Re: [PATCH] arm64: kasan: instrument user memory access API



On 05/26/2016 09:43 PM, Yang Shi wrote:
> The upstream commit 1771c6e1a567ea0ba2cccc0a4ffe68a1419fd8ef
> ("x86/kasan: instrument user memory access API") added KASAN instrument to
> x86 user memory access API, so added such instrument to ARM64 too.
> 
> Tested by test_kasan module.
> 
> Signed-off-by: Yang Shi <yang.shi@...aro.org>
> ---
>  arch/arm64/include/asm/uaccess.h | 18 ++++++++++++++++--
>  1 file changed, 16 insertions(+), 2 deletions(-)

Please, cover __copy_from_user() and __copy_to_user() too.
Unlike x86, your patch doesn't instrument these two.