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From: Tejun Heo <tj@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	vda.linux@googlemail.com, jan.kratochvil@redhat.com,
	pedro@codesourcery.com, indan@nul.nu, bdonlan@gmail.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] ptrace_init_task: initialize child->jobctl explicitly
Date: Wed, 13 Jul 2011 12:25:20 +0200	[thread overview]
Message-ID: <20110713102520.GI2872@htj.dyndns.org> (raw)
In-Reply-To: <20110708171339.GB26943@redhat.com>

On Fri, Jul 08, 2011 at 07:13:39PM +0200, Oleg Nesterov wrote:
> new_child->jobctl is not initialized during the fork, it is copied
> from parent->jobctl. Currently this is harmless, the forking task
> is running and copy_process() can't succeed if signal_pending() is
> true, so only JOBCTL_STOP_DEQUEUED can be copied. Still this is a
> bit fragile, it would be more clean to set ->jobctl = 0 explicitly.
> 
> Also, check ->ptrace != 0 instead of PT_PTRACED, move the
> CONFIG_HAVE_HW_BREAKPOINT code up.
> 
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun

  reply	other threads:[~2011-07-13 10:25 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-08 17:13 [RFC PATCH 0/3] PTRACE_SEIZE && fork() fixes Oleg Nesterov
2011-07-08 17:13 ` [PATCH 1/3] ptrace_init_task: initialize child->jobctl explicitly Oleg Nesterov
2011-07-13 10:25   ` Tejun Heo [this message]
2011-07-08 17:13 ` [PATCH 2/3] ptrace: mv send-SIGSTOP from do_fork() to ptrace_init_task() Oleg Nesterov
2011-07-08 17:14 ` [RFC PATCH 3/3] ptrace: dont send SIGSTOP on auto-attach if PT_SEIZED Oleg Nesterov
2011-07-13 12:10   ` Tejun Heo

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