linux-kernel - Re: [PATCH] Smack: Simplified Mandatory Access Control Kernel

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Date:	Sun, 12 Aug 2007 13:39:07 +1000
From:	Keith Owens <kaos@....com.au>
To:	casey@...aufler-ca.com
cc:	Arjan van de Ven <arjan@...radead.org>,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, akpm@...l.org, torvalds@...l.org
Subject: Re: [PATCH] Smack: Simplified Mandatory Access Control Kernel 

Casey Schaufler (on Sat, 11 Aug 2007 12:56:42 -0700 (PDT)) wrote:
>
>--- Arjan van de Ven <arjan@...radead.org> wrote:
>> > +#include <linux/kernel.h>
>> > +#include <linux/vmalloc.h>
>> > +#include <linux/security.h>
>> > +#include <linux/mutex.h>
>> > +#include <net/netlabel.h>
>> > +#include "../../net/netlabel/netlabel_domainhash.h"
>> 
>> can't you move this header to include/ instead?
>
>Paul Moore, the developer of netlabel, promised to work out
>the right solution for this with me at a future date. He
>doesn't want to move the header, and I respect that.

foo.c has

#include "netlabel_domainhash.h"

Makefile has CFLAGS_foo.o += -I$(srctree)/net/netlabel

I prefer to use -I $(srctree)/net/netlabel for readability but '-I '
breaks on SuSE builds for some reason that I cannot be bothered working
out.  -I$(srctree)/net/netlabel works.

>> > +	doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
>> > +	if (doip == NULL)
>> > +		panic("smack:  Failed to initialize cipso DOI.\n");
>> > +	doip->map.std = NULL;
>> > +
>> > +	ndmp = kmalloc(sizeof(struct netlbl_dom_map), GFP_KERNEL);
>> > +	if (ndmp == NULL)
>> > +		panic("smack:  Failed to initialize cipso ndmp.\n");
>> 
>> 
>> is panic() really the right thing here? It's usually considered quite
>> rude ;)
>
>It's really early in start-up and if you're out of memory at that
>point you are not going very far into the future.

Not to mention that you might end up running with an insecure system.
Security must be failsafe.

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