linux-kernel - Re: [PATCH] Exporting capability code/name pairs

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Message-ID: <477C3EE9.2060600@kernel.org>
Date:	Wed, 02 Jan 2008 17:48:25 -0800
From:	Andrew Morgan <morgan@...nel.org>
To:	KaiGai Kohei <kaigai@...gai.gr.jp>
CC:	KaiGai Kohei <kaigai@...jp.nec.com>,
	"Serge E. Hallyn" <serue@...ibm.com>, jmorris@...ei.org,
	akpm@...l.org, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Exporting capability code/name pairs

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There is also the issue of compiled code which explicitly raises and
lowers capabilities around critical code sections (ie., as they were
intended to be used) is also not well served by this change.

That is, unless the code was compiled with things like CAP_MAC_ADMIN
being #define'd then it won't be able to do things like cap_set_flag()
appropriately.

Cheers

Andrew

KaiGai Kohei wrote:
> Andrew Morgan wrote:
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>> KaiGai Kohei wrote:
>>> Remaining issues:
>>> - We have to mount securityfs explicitly, or use /etc/fstab.
>>>   It can cause a matter when we want to use this feature on
>>>   very early phase on boot. (like /sbin/init)
>> I'm not altogether clear how you intend this to work.
>>
>> Are you saying that some future version of libcap will require that
>> securityfs be mounted before it (libcap) will work?
> 
> Yes, but implementing this feature on securityfs might be not good
> idea as as James said. If this feature is on procfs or sysfs, it is
> not necessary to mount securityfs explicitly.
> 
> Thanks,
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