linux-kernel - Re: [PATCH 2/3] [RFC] seccomp: give BPF x32 bit when restoring x32 filter

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Message-ID: <53C01484.8080609@zytor.com>
Date:	Fri, 11 Jul 2014 09:44:52 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Paul Moore <pmoore@...hat.com>, Richard Guy Briggs <rgb@...hat.com>
CC:	linux-audit@...hat.com, linux-kernel@...r.kernel.org,
	Eric Paris <eparis@...hat.com>, Al Viro <aviro@...hat.com>,
	Will Drewry <wad@...omium.org>
Subject: Re: [PATCH 2/3] [RFC] seccomp: give BPF x32 bit when restoring x32
 filter

On 07/11/2014 09:36 AM, Paul Moore wrote:
> 
> Arguably audit is broken anyway by not correctly treating syscall numbers as 
> 32 bit integers like everyone else.
> 

That is really the root cause of the problem.  x86 is not the only
architecture with a sparse syscall numbering scheme (in fact the x32
method was based on the MIPS syscall numbering scheme.)

What syscall_get_nr() returns becomes a matter of definition at that point.

	-hpa

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