linux-kernel - Re: [PATCH v5 2/3] seccomp_filters: system call filtering using BPF

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Message-ID: <CAB=4xhr73ON-rmiHXFspLANO0JfNWpc4sduF5-z6UaBODsgF6w@mail.gmail.com>
Date:	Wed, 1 Feb 2012 09:34:31 -0800
From:	Roland McGrath <mcgrathr@...gle.com>
To:	Indan Zupancic <indan@....nu>
Cc:	Will Drewry <wad@...omium.org>, linux-kernel@...r.kernel.org,
	keescook@...omium.org, john.johansen@...onical.com,
	serge.hallyn@...onical.com, coreyb@...ux.vnet.ibm.com,
	pmoore@...hat.com, eparis@...hat.com, djm@...drot.org,
	torvalds@...ux-foundation.org, segoon@...nwall.com,
	rostedt@...dmis.org, jmorris@...ei.org, scarybeasts@...il.com,
	avi@...hat.com, penberg@...helsinki.fi, viro@...iv.linux.org.uk,
	luto@....edu, mingo@...e.hu, akpm@...ux-foundation.org,
	khilman@...com, borislav.petkov@....com, amwang@...hat.com,
	oleg@...hat.com, ak@...ux.intel.com, eric.dumazet@...il.com,
	gregkh@...e.de, dhowells@...hat.com, daniel.lezcano@...e.fr,
	linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, olofj@...omium.org,
	mhalcrow@...gle.com, dlaor@...hat.com, corbet@....net,
	alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH v5 2/3] seccomp_filters: system call filtering using BPF

On Tue, Jan 31, 2012 at 5:36 PM, Indan Zupancic <indan@....nu> wrote:
>> ref: http://lkml.indiana.edu/hypermail/linux/kernel/0906.3/00096.html
>
> That's 2009! I wonder why no progress happened since then.

At that time I did most of all the CONFIG_HAVE_ARCH_TRACEHOOK work for ARM.
The ARM kernel maintainers just weren't interested in paying attention, and
I gave up on hounding them.  Since then, only a subset of what I did before
has actually been done and merged.  (e.g. there is now some user_regset
support, but less than what I implemented and posted originally--so for
some ARM variants there is still register information only accessible via
old ptrace calls but not in core dumps and no PTRACE_GETREGSET support.
The really trivial stuff like using tracehook_report_* still hasn't gone
in, though I posted that code back then too.)


Thanks,
Roland
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