linux-kernel - Re: [Patch 1/2] selinux: ajust rules for ATTR

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Date:	Wed, 19 Aug 2009 10:34:15 +0800
From:	Amerigo Wang <amwang@...hat.com>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
CC:	Stephen Smalley <sds@...ho.nsa.gov>, linux-kernel@...r.kernel.org,
	esandeen@...hat.com, eteo@...hat.com, eparis@...hat.com,
	linux-fsdevel@...r.kernel.org, akpm@...ux-foundation.org,
	viro@...iv.linux.org.uk
Subject: Re: [Patch 1/2] selinux: ajust rules for ATTR_FORCE

OGAWA Hirofumi wrote:
> [My ISP still seems to be stopping email server :-/]
>
>   
>>>> So if I read this correctly, (ATTR_FORCE| ATTR_KILL_SUID|ATTR_MODE) will 
>>>> not return here, since 'ia_valid' will be ATTR_FORCE finally.
>>>>
>>>> I think you forgot to clear ATTR_FORCE here...
>>>>         
>>> Whoops, good catch. Fortunately, it doesn't seem to have actual problem,
>>> but it's bug obviously, and sorry for that. Fixed patch was attached.
>>>       
>> You can add my:
>> Acked-by:  Stephen Smalley <sds@...ho.nsa.gov>
>>     
>
> Thanks.
>
> Amerigo, could you handle that patch with his ack for the remaining work?
>   

No problem, I will resend the newest patch with his Ack.
> BTW, I think [Patch 2/2] of
>
> -	newattrs.ia_valid |= should_remove_suid(dentry);
> +	ret = should_remove_suid(dentry);
> +	newattrs.ia_valid |= ret;
> +	if (ret)
> +		newattrs.ia_valid |= ATTR_FORCE;
>
> should be
>
> 	killsuid = should_remove_suid(dentry);
> 	if (killsuid)
> 		newattrs.ia_valid |= killsuid | ATTR_FORCE;
>   

Hmm, I almost forgot this... This only saves one statement if 'ret == 
0', but that is OK, I will change it.

Thanks!

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