linux-kernel - Re: [PATCH v2] futex: mark get_robust

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: <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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/