From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Darren Hart <darren@dvhart.com>,
Davidlohr Bueso <davidlohr@hp.com>,
Ingo Molnar <mingo@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Clark Williams <williams@redhat.com>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
Roland McGrath <roland@hack.frob.com>,
Carlos ODonell <carlos@redhat.com>,
Jakub Jelinek <jakub@redhat.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [patch 3/3] futex: Prevent attaching to kernel threads
Date: Mon, 12 May 2014 22:54:44 +0200 [thread overview]
Message-ID: <20140512205444.GI13467@laptop.programming.kicks-ass.net> (raw)
In-Reply-To: <20140512201701.194824402@linutronix.de>
On Mon, May 12, 2014 at 08:45:35PM -0000, Thomas Gleixner wrote:
> We happily allow userspace to declare a random kernel thread to be the
> owner of a user space PI futex.
>
> Found while analysing the fallout of Dave Jones syscall fuzzer.
Did you also still want to check the ppid for _PRIVATE futexes?
next prev parent reply other threads:[~2014-05-12 20:55 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 20:45 [patch 0/3] futex/rtmutex: Fix issues exposed by trinity Thomas Gleixner
2014-05-12 20:45 ` [patch 1/3] rtmutex: Add missing deadlock check Thomas Gleixner
2014-05-13 5:51 ` Lai Jiangshan
2014-05-13 8:45 ` Thomas Gleixner
2014-05-13 8:48 ` Peter Zijlstra
2014-05-13 16:12 ` Paul E. McKenney
2014-05-13 19:42 ` Thomas Gleixner
2014-05-13 20:20 ` Steven Rostedt
2014-05-13 20:36 ` Paul E. McKenney
2014-05-13 21:27 ` Thomas Gleixner
2014-05-13 22:00 ` Paul E. McKenney
2014-05-13 22:44 ` Steven Rostedt
2014-05-13 23:27 ` Paul E. McKenney
2014-05-13 23:53 ` Steven Rostedt
2014-05-14 0:12 ` Paul E. McKenney
2014-05-14 6:54 ` Thomas Gleixner
[not found] ` <CAGChsmO9GO1Z2VBbw7uLtTXpYowdoUQbK8C3=Dt2jtGAnc6D2A@mail.gmail.com>
2014-05-14 13:33 ` Thomas Gleixner
2014-05-14 6:42 ` Thomas Gleixner
2014-05-14 12:59 ` Thomas Gleixner
2014-05-12 20:45 ` [patch 2/3] futex: Add another early deadlock detection check Thomas Gleixner
2014-05-19 12:22 ` [tip:core/urgent] " tip-bot for Thomas Gleixner
2014-05-12 20:45 ` [patch 3/3] futex: Prevent attaching to kernel threads Thomas Gleixner
2014-05-12 20:54 ` Peter Zijlstra [this message]
2014-05-12 21:16 ` Thomas Gleixner
2014-05-12 21:59 ` Davidlohr Bueso
2014-05-12 22:18 ` Thomas Gleixner
2014-05-19 12:22 ` [tip:core/urgent] " tip-bot for Thomas Gleixner
2014-05-12 21:37 ` [patch 0/3] futex/rtmutex: Fix issues exposed by trinity Steven Rostedt
2014-05-12 21:52 ` Thomas Gleixner
2014-05-12 22:08 ` Steven Rostedt
2014-05-12 22:37 ` Thomas Gleixner
2014-05-12 23:18 ` Steven Rostedt
2014-05-13 6:37 ` Ingo Molnar
2014-05-13 3:54 ` Darren Hart
2014-05-13 9:08 ` Thomas Gleixner
2014-05-14 7:06 ` Carlos O'Donell
2014-05-14 10:26 ` Thomas Gleixner
2014-05-14 20:59 ` Carlos O'Donell
2014-05-14 22:54 ` Thomas Gleixner
2014-05-15 7:37 ` Peter Zijlstra
2014-05-15 8:25 ` Peter Zijlstra
2014-05-16 18:21 ` Carlos O'Donell
2014-05-14 6:58 ` Carlos O'Donell
2014-05-14 9:22 ` Peter Zijlstra
2014-05-14 21:17 ` Carlos O'Donell
2014-05-14 23:11 ` Thomas Gleixner
2014-05-16 17:54 ` Carlos O'Donell
2014-05-15 8:07 ` Peter Zijlstra
2014-05-16 18:14 ` Carlos O'Donell
2014-05-14 9:53 ` Thomas Gleixner
2014-05-14 10:07 ` Peter Zijlstra
2014-05-14 10:28 ` Thomas Gleixner
2014-05-16 17:55 ` Carlos O'Donell
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