lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 22 Feb 2012 15:51:40 -0800
From:	Andrew Lutomirski <luto@....edu>
To:	Indan Zupancic <indan@....nu>
Cc:	Will Drewry <wad@...omium.org>,
	Ben Hutchings <bhutchings@...arflare.com>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com,
	netdev@...r.kernel.org, x86@...nel.org, arnd@...db.de,
	davem@...emloft.net, hpa@...or.com, mingo@...hat.com,
	oleg@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
	mcgrathr@...omium.org, tglx@...utronix.de, eparis@...hat.com,
	serge.hallyn@...onical.com, djm@...drot.org, scarybeasts@...il.com,
	pmoore@...hat.com, akpm@...ux-foundation.org, corbet@....net,
	eric.dumazet@...il.com, markus@...omium.org, keescook@...omium.org
Subject: Re: [PATCH v10 05/11] seccomp: add system call filtering using BPF

On Wed, Feb 22, 2012 at 3:46 PM, Indan Zupancic <indan@....nu> wrote:
> On Wed, February 22, 2012 20:47, Will Drewry wrote:
>> On Wed, Feb 22, 2012 at 8:23 AM, Ben Hutchings
>>> I would have thought the way to make sure the architecture is always
>>> checked is to pack it together with the syscall number.
>
> I missed that suggestion, putting the syscall number and arch in one
> data field would indeed make it harder to not check the arch.

Is there enough room?  On x86-64 at least, rax could conceivably be
extended to 64 bits some day.  Bit 30 is already spoken for by x32.

--Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists