kernel-hardening - Re: [PATCH v4] scripts: add leaking

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Message-ID: <20171109020857.GC19752@eros>
Date: Thu, 9 Nov 2017 13:08:57 +1100
From: "Tobin C. Harding" <me@...in.cc>
To: Michael Ellerman <mpe@...erman.id.au>
Cc: kernel-hardening@...ts.openwall.com,
	"Jason A. Donenfeld" <Jason@...c4.com>,
	Theodore Ts'o <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Tycho Andersen <tycho@...ker.com>,
	"Roberts, William C" <william.c.roberts@...el.com>,
	Tejun Heo <tj@...nel.org>,
	Jordan Glover <Golden_Miller83@...tonmail.ch>,
	Greg KH <gregkh@...uxfoundation.org>,
	Petr Mladek <pmladek@...e.com>, Joe Perches <joe@...ches.com>,
	Ian Campbell <ijc@...lion.org.uk>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <wilal.deacon@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Chris Fries <cfries@...gle.com>, Dave Weinstein <olorin@...gle.com>,
	Daniel Micay <danielmicay@...il.com>,
	Djalal Harouni <tixxdz@...il.com>, linux-kernel@...r.kernel.org,
	Network Development <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v4] scripts: add leaking_addresses.pl

On Thu, Nov 09, 2017 at 11:49:52AM +1100, Michael Ellerman wrote:
> "Tobin C. Harding" <me@...in.cc> writes:
> 
> > On Wed, Nov 08, 2017 at 11:10:56PM +1100, Michael Ellerman wrote:
> >> "Tobin C. Harding" <me@...in.cc> writes:
> > [snip]
> >
> > Hi Michael,
> >
> > I'm working an adding support for ppc64 to leaking_addresses.pl, I've
> > added the kernel address regular expression that you suggested.
> 
> Thanks!
> 
> > I'd like to add the false positive for vsyscall addresses. Excuse my
> > ignorance but does PowerPC use a constant address range for vsyscall like x86_64
> > does? The ppc64 machine I have access to does not output anything for
> >
> > 	$ cat /proc/PID/tasks/PID/smaps		or
> > 	$ cat /proc/PID/tasks/PID/maps
> 
> No we only have the vdso style vsyscall, which is mapped at user
> addresses and is subject to ASLR, so you shouldn't need to worry about
> it.

Great. I'll add you to the CC list for the next spin. In line with my
aim of having the most confusing patches to follow the next version will
likely be

[PATCH 0/X v2] scripts/leaking_addresses: add summary report

thanks,
Tobin.

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