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Message-ID: <87pq7935w2.fsf@xmission.com>
Date: Thu, 02 Aug 2012 04:11:41 -0700
From: ebiederm@...ssion.com (Eric W. Biederman)
To: richard -rw- weinberger <richard.weinberger@...il.com>
Cc: Kees Cook <keescook@...omium.org>, Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, Randy Dunlap <rdunlap@...otime.net>, Darren Hart <dvhart@...ux.intel.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Andrew Morton <akpm@...ux-foundation.org>, Jiri Kosina <jkosina@...e.cz>, David Howells <dhowells@...hat.com>, "Serge E. Hallyn" <serge.hallyn@...onical.com>, linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com, spender@...ecurity.net
Subject: Re: [PATCH v2] futex: mark get_robust_list as deprecated
richard -rw- weinberger <richard.weinberger@...il.com> writes:
> On Fri, Mar 23, 2012 at 8:08 PM, Kees Cook <keescook@...omium.org> wrote:
>> Notify get_robust_list users that the syscall is going away.
>>
>> Suggested-by: Thomas Gleixner <tglx@...utronix.de>
>> Signed-off-by: Kees Cook <keescook@...omium.org>
>> ---
>
> I'm using this system call in an application and noticed that's marked
> as deprecated now.
> My application collects all kind of information from crashing programs.
> It's installed in /proc/sys/kernel/core_pattern.
>
> If program X is crashing it executes get_robust_list(X) to get the
> address of the robust list
> and reads the list from /proc/X/mem.
>
> Is there another way to get the robust list from another program (by it's pid)?
The folks doing checkpoint/restart claim to not need this, so there
might be a way either that or they just haven't hit this problem yet.
What you are doing sounds like a reasonable use of get_robust_list to me.
Eric
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