From: ebiederm@xmission.com (Eric W. Biederman)
To: richard -rw- weinberger <richard.weinberger@gmail.com>
Cc: Kees Cook <keescook@chromium.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Randy Dunlap <rdunlap@xenotime.net>,
Darren Hart <dvhart@linux.intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Kosina <jkosina@suse.cz>,
David Howells <dhowells@redhat.com>,
"Serge E. Hallyn" <serge.hallyn@canonical.com>,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
spender@grsecurity.net
Subject: [kernel-hardening] Re: [PATCH v2] futex: mark get_robust_list as deprecated
Date: Thu, 02 Aug 2012 04:11:41 -0700 [thread overview]
Message-ID: <87pq7935w2.fsf@xmission.com> (raw)
In-Reply-To: <CAFLxGvzPVPyXPwjay4a01q1vx4K4Ht56bHjzswYrr1wvB_1dYw@mail.gmail.com> (richard's message of "Thu, 2 Aug 2012 12:35:57 +0200")
richard -rw- weinberger <richard.weinberger@gmail.com> writes:
> On Fri, Mar 23, 2012 at 8:08 PM, Kees Cook <keescook@chromium.org> wrote:
>> Notify get_robust_list users that the syscall is going away.
>>
>> Suggested-by: Thomas Gleixner <tglx@linutronix.de>
>> Signed-off-by: Kees Cook <keescook@chromium.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
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: richard -rw- weinberger <richard.weinberger@gmail.com>
Cc: Kees Cook <keescook@chromium.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Randy Dunlap <rdunlap@xenotime.net>,
Darren Hart <dvhart@linux.intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Kosina <jkosina@suse.cz>,
David Howells <dhowells@redhat.com>,
"Serge E. Hallyn" <serge.hallyn@canonical.com>,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
spender@grsecurity.net
Subject: Re: [PATCH v2] futex: mark get_robust_list as deprecated
Date: Thu, 02 Aug 2012 04:11:41 -0700 [thread overview]
Message-ID: <87pq7935w2.fsf@xmission.com> (raw)
In-Reply-To: <CAFLxGvzPVPyXPwjay4a01q1vx4K4Ht56bHjzswYrr1wvB_1dYw@mail.gmail.com> (richard's message of "Thu, 2 Aug 2012 12:35:57 +0200")
richard -rw- weinberger <richard.weinberger@gmail.com> writes:
> On Fri, Mar 23, 2012 at 8:08 PM, Kees Cook <keescook@chromium.org> wrote:
>> Notify get_robust_list users that the syscall is going away.
>>
>> Suggested-by: Thomas Gleixner <tglx@linutronix.de>
>> Signed-off-by: Kees Cook <keescook@chromium.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
next prev parent reply other threads:[~2012-08-02 11:11 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-19 23:12 [kernel-hardening] [PATCH] futex: do not leak robust list to unprivileged process Kees Cook
2012-03-19 23:12 ` Kees Cook
2012-03-20 13:31 ` [kernel-hardening] " Serge Hallyn
2012-03-20 13:31 ` Serge Hallyn
2012-03-20 17:02 ` [kernel-hardening] " Thomas Gleixner
2012-03-20 17:02 ` Thomas Gleixner
2012-03-20 17:11 ` [kernel-hardening] " Kees Cook
2012-03-20 17:11 ` Kees Cook
2012-03-20 17:23 ` [kernel-hardening] " Ingo Molnar
2012-03-20 17:23 ` Ingo Molnar
2012-03-22 23:46 ` [kernel-hardening] " Thomas Gleixner
2012-03-22 23:46 ` Thomas Gleixner
2012-03-23 17:58 ` [kernel-hardening] [PATCH] futex: mark get_robust_list as deprecated Kees Cook
2012-03-23 17:58 ` Kees Cook
2012-03-23 18:27 ` [kernel-hardening] " Thomas Gleixner
2012-03-23 18:27 ` Thomas Gleixner
2012-03-23 19:08 ` [kernel-hardening] " Kees Cook
2012-03-23 19:08 ` Kees Cook
2012-03-23 19:08 ` [kernel-hardening] [PATCH v2] " Kees Cook
2012-03-23 19:08 ` Kees Cook
[not found] ` <20120323190855.GA27213-0X9Bc/hWBUTk6RaD4rd5nQ@public.gmane.org>
2012-03-23 22:06 ` Eric W. Biederman
2012-03-23 22:06 ` Eric W. Biederman
2012-03-23 22:06 ` [kernel-hardening] " Eric W. Biederman
[not found] ` <m1fwczvuph.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2012-03-23 22:10 ` Kees Cook
2012-03-23 22:10 ` Kees Cook
2012-03-23 22:10 ` [kernel-hardening] " Kees Cook
2012-03-30 5:05 ` Matt Helsley
2012-03-30 5:05 ` Matt Helsley
2012-03-30 5:05 ` [kernel-hardening] " Matt Helsley
[not found] ` <20120330050544.GA32299-52DBMbEzqgQ/wnmkkaCWp/UQ3DHhIser@public.gmane.org>
2012-03-30 6:14 ` Pavel Emelyanov
2012-03-30 6:14 ` Pavel Emelyanov
2012-03-30 6:14 ` [kernel-hardening] " Pavel Emelyanov
2012-03-30 22:51 ` Gene Cooperman
2012-03-30 22:51 ` [kernel-hardening] " Gene Cooperman
2012-03-30 22:51 ` Gene Cooperman
2012-03-27 18:05 ` [kernel-hardening] " Josh Boyer
2012-03-27 18:05 ` Josh Boyer
2012-03-27 19:13 ` [kernel-hardening] " Peter Zijlstra
2012-03-27 19:13 ` Peter Zijlstra
2012-03-29 9:56 ` [tip:core/locking] futex: Mark " tip-bot for Kees Cook
2012-08-02 10:35 ` [kernel-hardening] Re: [PATCH v2] futex: mark " richard -rw- weinberger
2012-08-02 10:35 ` richard -rw- weinberger
2012-08-02 11:11 ` Eric W. Biederman [this message]
2012-08-02 11:11 ` Eric W. Biederman
2012-08-03 10:17 ` [kernel-hardening] " richard -rw- weinberger
2012-08-03 10:17 ` richard -rw- weinberger
2012-08-03 11:02 ` [kernel-hardening] " Cyrill Gorcunov
2012-08-03 11:02 ` Cyrill Gorcunov
2012-08-03 11:19 ` [kernel-hardening] " richard -rw- weinberger
2012-08-03 11:19 ` richard -rw- weinberger
2012-08-03 11:27 ` [kernel-hardening] " Cyrill Gorcunov
2012-08-03 11:27 ` Cyrill Gorcunov
2012-08-03 11:30 ` [kernel-hardening] " richard -rw- weinberger
2012-08-03 11:30 ` richard -rw- weinberger
2012-08-03 11:35 ` [kernel-hardening] " Cyrill Gorcunov
2012-08-03 11:35 ` Cyrill Gorcunov
2012-08-03 11:38 ` [kernel-hardening] " richard -rw- weinberger
2012-08-03 11:38 ` richard -rw- weinberger
2012-08-03 12:38 ` [kernel-hardening] " Pavel Emelyanov
2012-08-03 12:38 ` Pavel Emelyanov
2012-08-03 12:58 ` [kernel-hardening] " Eric W. Biederman
2012-08-03 12:58 ` Eric W. Biederman
2012-08-03 13:00 ` [kernel-hardening] " richard -rw- weinberger
2012-08-03 13:00 ` richard -rw- weinberger
2012-08-03 17:16 ` [kernel-hardening] " Kees Cook
2012-08-03 17:16 ` Kees Cook
2012-08-03 18:06 ` [kernel-hardening] [PATCH] Revert "futex: Mark get_robust_list as deprecated" Richard Weinberger
2012-03-28 18:33 ` [kernel-hardening] Re: [PATCH] futex: do not leak robust list to unprivileged process Kees Cook
2012-03-28 18:33 ` Kees Cook
2012-03-28 21:24 ` [kernel-hardening] " Thomas Gleixner
2012-03-28 21:24 ` Thomas Gleixner
2012-03-29 9:55 ` [tip:core/locking] futex: Do " tip-bot for Kees Cook
2012-06-19 1:41 ` Wanlong Gao
2012-06-19 2:24 ` Serge Hallyn
2012-06-19 2:32 ` Wanlong Gao
2012-06-19 3:13 ` Serge Hallyn
2012-06-19 3:21 ` Wanlong Gao
2012-06-19 12:23 ` Serge Hallyn
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