From: Dmitry Vyukov <dvyukov@google.com>
To: paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, alexandre.ghiti@canonical.com
Cc: syzbot+0600986d88e2d4d7ebb8@syzkaller.appspotmail.com,
linux-riscv@lists.infradead.org, kasan-dev@googlegroups.com
Subject: Re: [PATCH] riscv: Increase stack size under KASAN
Date: Mon, 21 Mar 2022 15:59:27 +0100 [thread overview]
Message-ID: <CACT4Y+YA4eFJUe1Ozh--YBMfxZ-ByiMmg0qs6En+wV2-JhQ9-A@mail.gmail.com> (raw)
In-Reply-To: <20220314090652.1607915-1-dvyukov@google.com>
On Mon, 14 Mar 2022 at 10:06, Dmitry Vyukov <dvyukov@google.com> wrote:
>
> KASAN requires more stack space because of compiler instrumentation.
> Increase stack size as other arches do.
>
> Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
> Reported-by: syzbot+0600986d88e2d4d7ebb8@syzkaller.appspotmail.com
> Cc: linux-riscv@lists.infradead.org
> Cc: kasan-dev@googlegroups.com
ping
> ---
> arch/riscv/include/asm/thread_info.h | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h
> index 60da0dcacf145..74d888c8d631a 100644
> --- a/arch/riscv/include/asm/thread_info.h
> +++ b/arch/riscv/include/asm/thread_info.h
> @@ -11,11 +11,17 @@
> #include <asm/page.h>
> #include <linux/const.h>
>
> +#ifdef CONFIG_KASAN
> +#define KASAN_STACK_ORDER 1
> +#else
> +#define KASAN_STACK_ORDER 0
> +#endif
> +
> /* thread information allocation */
> #ifdef CONFIG_64BIT
> -#define THREAD_SIZE_ORDER (2)
> +#define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER)
> #else
> -#define THREAD_SIZE_ORDER (1)
> +#define THREAD_SIZE_ORDER (1 + KASAN_STACK_ORDER)
> #endif
> #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
>
>
> base-commit: 0966d385830de3470b7131db8e86c0c5bc9c52dc
> --
> 2.35.1.723.g4982287a31-goog
>
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next prev parent reply other threads:[~2022-03-21 15:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-14 9:06 [PATCH] riscv: Increase stack size under KASAN Dmitry Vyukov
2022-03-21 14:59 ` Dmitry Vyukov [this message]
2022-03-31 5:52 ` Palmer Dabbelt
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