linux-kernel - Re: [PATCH 1/1] riscv: Fix KASAN memory mapping.

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Message-ID: <mhng-40ebb582-4df3-4189-9521-5446cbe1a9e6@palmerdabbelt-glaptop>
Date:   Wed, 13 Jan 2021 20:57:49 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     nylon7@...estech.com
CC:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, aou@...s.berkeley.edu,
        Paul Walmsley <paul.walmsley@...ive.com>, dvyukov@...gle.com,
        glider@...gle.com, aryabinin@...tuozzo.com, alankao@...estech.com,
        nickhu@...estech.com, nylon7@...estech.com
Subject:     Re: [PATCH 1/1] riscv: Fix KASAN memory mapping.

On Tue, 12 Jan 2021 18:24:10 PST (-0800), nylon7@...estech.com wrote:
> From: Nick Hu <nickhu@...estech.com>
>
> Use virtual address instead of physical address when translating
> the address to shadow memory by kasan_mem_to_shadow().
>
> Signed-off-by: Nick Hu <nickhu@...estech.com>
> Signed-off-by: Nylon Chen <nylon7@...estech.com>
> ---
>  arch/riscv/mm/kasan_init.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
> index 12ddd1f6bf70..a8a2ffd9114a 100644
> --- a/arch/riscv/mm/kasan_init.c
> +++ b/arch/riscv/mm/kasan_init.c
> @@ -93,8 +93,8 @@ void __init kasan_init(void)
>  								VMALLOC_END));
>
>  	for_each_mem_range(i, &_start, &_end) {
> -		void *start = (void *)_start;
> -		void *end = (void *)_end;
> +		void *start = (void *)__va(_start);
> +		void *end = (void *)__va(_end);
>
>  		if (start >= end)
>  			break;

Thanks, this is on fixes.