linux-kernel - Re: [Patch] kexec_load: check CAP_SYS

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Message-ID: <4D2C3E4D.3070307@redhat.com>
Date:	Tue, 11 Jan 2011 19:26:05 +0800
From:	Cong Wang <amwang@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org
Subject: Re: [Patch] kexec_load: check CAP_SYS_MODULE

于 2011年01月09日 10:09, Eric W. Biederman 写道:
>
> We aren't dealing with modules I think CAP_SYS_MODULE is totally
> irrelevant in the context of kexec.


Yeah, although I don't really understand CAP_SYS_MODULE, but it
really confused me to add it to kexec_load() from its name.

>
> I think to accomplish what you want we either need a way to disable
> sys_kexec_load or possibly a new very targeted capability bit.
>
> You are making it so that giving someone CAP_SYS_MODULE is giving more
> than the ability to load kernel modules.  Which seems non-intuitive from
> a system management point of view.
>

How about CAP_SYS_KEXEC?

Thanks.
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