linux-kernel - Re: malicious filesystems (was Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM

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Message-ID: <20070714212102.GA214@tv-sign.ru>
Date:	Sun, 15 Jul 2007 01:21:02 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Pavel Machek <pavel@....cz>,
	linux-kernel@...r.kernel.org
Subject: Re: malicious filesystems (was Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM

I am sorry for being completely off-topic, but

Miklos Szeredi wrote:
>
> SIGKILL won't work on a stopped task.  Neither on a traced task.

Why do you think so? It works in both cases (ptracer can use
PT_TRACE_EXIT, but the task is killed anyway).

> Neither on a zombie (how many newbies are thoroughly confused about
> that ;)

This is true. Unless this zombie is a group leader, and we have other
threads.

Oleg.

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