linux-kernel - Re: [PATCH 1/4] Cache xattr security drop check for write

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Message-ID: <20110529142432.GA7103@alboin.amr.corp.intel.com>
Date:	Sun, 29 May 2011 07:24:32 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Valdis.Kletnieks@...edu
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	chris.mason@...cle.com, josef@...hat.com, agruen@...bit.com,
	"Serge E. Hallyn" <serue@...ibm.com>
Subject: Re: [PATCH 1/4] Cache xattr security drop check for write

> And having said that, I'm not convinced it's the *right* check - on an SELinux
> system, pretty much *all* the files have a security xattr attached to them, and
> very few are actually setuid/setgid. So 98% of the time, or more, this will DTWT.

These are not for selinux xattrs, but capability xattrs.

And I think you misunderstand the semantics of the flag.
The flag just signifies the inode has neither suid nor capabilities.

-Andi
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