linux-kernel - Re: [PATCH 6/9] x86, pkeys: add pkey set/get syscalls

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]

Message-ID: <577FD587.6050101@sr71.net>
Date:	Fri, 8 Jul 2016 09:32:07 -0700
From:	Dave Hansen <dave@...1.net>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Mel Gorman <mgorman@...hsingularity.net>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-mm@...ck.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, dave.hansen@...ux.intel.com,
	arnd@...db.de, hughd@...gle.com, viro@...iv.linux.org.uk
Subject: Re: [PATCH 6/9] x86, pkeys: add pkey set/get syscalls

On 07/08/2016 12:18 AM, Ingo Molnar wrote:
> So the question is, what is user-space going to do? Do any glibc
> patches exist? How are the user-space library side APIs going to look
> like?

My goal at the moment is to get folks enabled to the point that they can
start modifying apps to use pkeys without having to patch their kernels.
 I don't have confidence that we can design good high-level userspace
interfaces without seeing some real apps try to use the low-level ones
and seeing how they struggle.

I had some glibc code to do the pkey alloc/free operations, but those
aren't necessary if we're doing it in the kernel.  Other than getting
the syscall wrappers in place, I don't have any immediate plans to do
anything in glibc.

Was there something you were expecting to see?