linux-kernel - Re: [PATCH v9 11/13] powerpc: select HAVE_SECCOMP_FILTER and provide seccomp

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Date:	Tue, 30 Aug 2011 15:28:03 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Will Drewry <wad@...omium.org>
Cc:	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	djm@...drot.org, segoon@...nwall.com, kees.cook@...onical.com,
	mingo@...e.hu, rostedt@...dmis.org, jmorris@...ei.org,
	fweisbec@...il.com, tglx@...utronix.de, scarybeasts@...il.com,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v9 11/13] powerpc: select HAVE_SECCOMP_FILTER and
 provide seccomp_execve

On Thu, 2011-06-23 at 19:36 -0500, Will Drewry wrote:
> Facilitate the use of CONFIG_SECCOMP_FILTER by wrapping compatibility
> system call numbering for execve and selecting HAVE_SECCOMP_FILTER.
> 
> v9: rebase on to bccaeafd7c117acee36e90d37c7e05c19be9e7bf
> 
> Signed-off-by: Will Drewry <wad@...omium.org>

Seen these around for a while ... :-)

I don't see a harm in the patches per-se tho I haven't reviewed the
actual seccomp filter stuff and it's good (or bad) behaviour on ppc.

Acked-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>

Cheers,
Ben.

> ---
>  arch/powerpc/Kconfig               |    1 +
>  arch/powerpc/include/asm/seccomp.h |    2 ++
>  2 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 2729c66..030d392 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -129,6 +129,7 @@ config PPC
>  	select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
>  	select HAVE_GENERIC_HARDIRQS
>  	select HAVE_SPARSE_IRQ
> +	select HAVE_SECCOMP_FILTER
>  	select IRQ_PER_CPU
>  	select GENERIC_IRQ_SHOW
>  	select GENERIC_IRQ_SHOW_LEVEL
> diff --git a/arch/powerpc/include/asm/seccomp.h b/arch/powerpc/include/asm/seccomp.h
> index 00c1d91..3cb9cc1 100644
> --- a/arch/powerpc/include/asm/seccomp.h
> +++ b/arch/powerpc/include/asm/seccomp.h
> @@ -7,10 +7,12 @@
>  #define __NR_seccomp_write __NR_write
>  #define __NR_seccomp_exit __NR_exit
>  #define __NR_seccomp_sigreturn __NR_rt_sigreturn
> +#define __NR_seccomp_execve __NR_execve
>  
>  #define __NR_seccomp_read_32 __NR_read
>  #define __NR_seccomp_write_32 __NR_write
>  #define __NR_seccomp_exit_32 __NR_exit
>  #define __NR_seccomp_sigreturn_32 __NR_sigreturn
> +#define __NR_seccomp_execve_32 __NR_execve
>  
>  #endif	/* _ASM_POWERPC_SECCOMP_H */


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