linux-kernel - Re: [PATCH 2/2] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ

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Message-ID: <20180725155513.GS4240@e103592.cambridge.arm.com>
Date:   Wed, 25 Jul 2018 16:55:13 +0100
From:   Dave Martin <Dave.Martin@....com>
To:     Will Deacon <will.deacon@....com>
Cc:     linux-kernel@...r.kernel.org, arnd@...db.de, oleg@...hat.com,
        linux@...inikbrodowski.net, viro@...iv.linux.org.uk,
        akpm@...ux-foundation.org, steve.mcintyre@....com,
        linux-arm-kernel@...ts.infradead.org, ebiederm@...ssion.com
Subject: Re: [PATCH 2/2] arm64: compat: Provide definition for
 COMPAT_SIGMINSTKSZ

On Wed, Jul 25, 2018 at 02:45:12PM +0100, Will Deacon wrote:
> arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value
> for compat tasks.
> 
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Dominik Brodowski <linux@...inikbrodowski.net>
> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Oleg Nesterov <oleg@...hat.com>
> Reported-by: Steve McIntyre <steve.mcintyre@....com>
> Signed-off-by: Will Deacon <will.deacon@....com>

Reviewed-by: Dave Martin <Dave.Martin@....com>

> ---
>  arch/arm64/include/asm/compat.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
> index 1a037b94eba1..cee28a05ee98 100644
> --- a/arch/arm64/include/asm/compat.h
> +++ b/arch/arm64/include/asm/compat.h
> @@ -159,6 +159,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
>  }
>  
>  #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
> +#define COMPAT_MINSIGSTKSZ	2048
>  
>  static inline void __user *arch_compat_alloc_user_space(long len)
>  {
> -- 
> 2.1.4
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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