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Subject: Re: [PATCH] LSM: Make security_hook_heads a local variable.
References: <20170520085147.GA4619@kroah.com>
 <1495365245-3185-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
 <20170522140306.GA3907@infradead.org>
 <d98f4cd5-3f21-3f7b-2842-12b9a009e453@schaufler-ca.com>
From: Igor Stoppa <igor.stoppa@huawei.com>
Message-ID: <d25e2fd3-da11-4ec0-8edc-f1327c04fa6e@huawei.com>
Date: Mon, 22 May 2017 22:50:09 +0300
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To: Casey Schaufler <casey@schaufler-ca.com>, Christoph Hellwig <hch@infradead.org>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: linux-security-module@vger.kernel.org, linux-mm@kvack.org, kernel-hardening@lists.openwall.com, linux-kernel@vger.kernel.org, Greg
 KH <gregkh@linuxfoundation.org>, James Morris <james.l.morris@oracle.com>, Kees Cook <keescook@chromium.org>, Paul Moore <paul@paul-moore.com>, Stephen Smalley <sds@tycho.nsa.gov>

On 22/05/17 18:09, Casey Schaufler wrote:
> On 5/22/2017 7:03 AM, Christoph Hellwig wrote:

[...]

>> But even with those we can still chain
>> them together with a list with external linkage.
> 
> I gave up that approach in 2012. Too many unnecessary calls to
> null functions, and massive function vectors with a tiny number
> of non-null entries. From a data structure standpoint, it was
> just wrong. The list scheme is exactly right for the task at
> hand.

I understand this as a green light, for me to continue with the plan of
using LSM Hooks as example for making dynamically allocated data become
read-only, using also Tetsuo's patch (thanks, btw).

Is that correct?

---
thanks, igor

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