linux-kernel - Re: [PATCH 19/25] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32

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: <20160422214013.GA2234@yury-N73SV>
Date:	Sat, 23 Apr 2016 00:40:13 +0300
From:	Yury Norov <ynorov@...iumnetworks.com>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	<arnd@...db.de>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-arch@...r.kernel.org>,
	<linux-s390@...r.kernel.org>, <pinskia@...il.com>,
	<Prasun.Kapoor@...iumnetworks.com>, <schwab@...e.de>,
	<broonie@...nel.org>, <linux-doc@...r.kernel.org>,
	<heiko.carstens@...ibm.com>, <agraf@...e.de>,
	<klimov.linux@...il.com>, <bamvor.zhangjian@...wei.com>,
	<schwidefsky@...ibm.com>, <Nathan_Lynch@...tor.com>,
	<joseph@...esourcery.com>,
	<christoph.muellner@...obroma-systems.com>
Subject: Re: [PATCH 19/25] arm64: ptrace: handle ptrace_request differently
 for aarch32 and ilp32

On Fri, Apr 22, 2016 at 06:10:09PM +0100, Catalin Marinas wrote:
> On Wed, Apr 06, 2016 at 01:08:41AM +0300, Yury Norov wrote:
> > Here new aarch32 ptrace syscall handler is introsuced to avoid run-time
> > detection of the task type.
> 
> The reason for this patch isn't clear to me. What's wrong with the
> run-time detection? It's not some performance critical code.
> 
> -- 
> Catalin

Hi Catalin,

It was requested by Arnd, 
It's not 'new' syscall basically,
just an attempt to avoid run-time 
detection of things that may be
detected an compile-time.

Yury.