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Message-ID: <1511890919.19952.42.camel@perches.com>
Date: Tue, 28 Nov 2017 09:41:59 -0800
From: Joe Perches <joe@...ches.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>, "Eric W. Biederman"
<ebiederm@...ssion.com>
Cc: "Tobin C. Harding" <me@...in.cc>, "Jason A. Donenfeld"
<Jason@...c4.com>, Theodore Ts'o <tytso@....edu>, Kees Cook
<keescook@...omium.org>, Paolo Bonzini <pbonzini@...hat.com>, Tycho
Andersen <tycho@...ho.ws>, "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>, 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>, Radim Krčmář
<rkrcmar@...hat.com>, Linux Kernel Mailing List
<linux-kernel@...r.kernel.org>, KVM list <kvm@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH 0/5] add printk specifier %px, unique identifier
On Tue, 2017-11-28 at 09:33 -0800, Linus Torvalds wrote:
> On Mon, Nov 27, 2017 at 10:26 PM, Eric W. Biederman
> <ebiederm@...ssion.com> wrote:
> > >
> > > Oh well, I just did /proc/<pid>/stack by making it just print 0
> > > unconditionally rather than the hex number.
> >
> > Patch?
>
> Oh, apparently I never pushed out yesterday.
>
> The patch literally just affects the (useless) hex number. So:
>
> cat /proc/self/stack
>
> now prints out
>
> [<0>] proc_pid_stack+0xaa/0x100
> [<0>] proc_single_show+0x48/0x80
> [<0>] seq_read+0xd2/0x410
> I considered getting rid of the whole "[<>]" thing, but that's where
> "maybe there are tools that parse this" came in.
>
> I doubt there are any, though. If proc-ps doesn't look at this, I
> don't know what could. But the format change might as well be a
> separate thing if somebody cares deeply.
Perhaps if there are really tools that parse this
the [<leading-0-width>] should be kept the same too.
>
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