From: Alexey Dobriyan <adobriyan@gmail.com>
To: wzt wzt <wzt.wzt@gmail.com>
Cc: linux-kernel@vger.kernel.org, sds@tycho.nsa.gov,
jmorris@namei.org, eparis@parisplace.org
Subject: Re: [PATCH] LSM: add static to security_ops variable
Date: Fri, 19 Feb 2010 13:44:46 +0200 [thread overview]
Message-ID: <b6fcc0a1002190344s75ecfcf6y625591a0fa8e9869@mail.gmail.com> (raw)
In-Reply-To: <628d1651002070324w424012eanda9392db26331905@mail.gmail.com>
On Sun, Feb 7, 2010 at 1:24 PM, wzt wzt <wzt.wzt@gmail.com> wrote:
> security_ops was declared as a global variable, so other drivers or
> kernel code can easily change its value, like:
With your patch they still can.
> extern struct security_operations *security_ops;
> security_ops = NULL;
>
> then insmod this driver immediately, it will get an oops. Other evil
> drivers can aslo fake this variable as extern.
next prev parent reply other threads:[~2010-02-19 11:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-07 11:24 wzt wzt
2010-02-07 14:14 ` Greg KH
2010-02-16 14:57 ` Stephen Smalley
2010-02-19 11:40 ` wzt wzt
2010-02-19 13:47 ` Stephen Smalley
2010-02-19 11:44 ` Alexey Dobriyan [this message]
2010-02-19 11:57 ` wzt wzt
2010-02-19 12:02 ` Alexey Dobriyan
2010-02-19 12:23 ` wzt wzt
2010-02-19 12:27 ` Alexey Dobriyan
2010-02-19 13:14 ` wzt wzt
2010-02-19 13:12 ` Bernd Petrovitsch
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