linux-kernel - [PATCH v3 0/3] ptrace: ensure arch_ptrace/ptrace

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Date:	Mon, 21 Jan 2013 20:47:23 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Kernel Security <security@...nel.org>,
	Michael Davidson <md@...gle.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Julien Tinnes <jln@...gle.com>,
	Aaron Durbin <adurbin@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>,
	Roland McGrath <roland@...k.frob.com>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v3 0/3] ptrace: ensure arch_ptrace/ptrace_request can never
	race with SIGKILL

On 01/21, Linus Torvalds wrote:
>
> I guess that works then. It's a bit sad, but at least I see why you did it.

OK, please see v3 rebased on top of "unexport ptrace_check_attach()" you
already applied.

I tried to update the comment in ptrace_check_attach(), and changed unfreeze()
to simply do WARN_ON() without if/return.

There is also the cosmetic change in 1/3,

	-		ptrace_signal_wake_up(child, task_is_traced(child));
	+		ptrace_signal_wake_up(child, true);

in __ptrace_unlink().

Oleg.

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