linux-kernel - Re: [PATCH] integrity: add ima_counts

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Message-ID: <8045.1248844337@jrobl>
Date:	Wed, 29 Jul 2009 14:12:17 +0900
From:	hooanon05@...oo.co.jp
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, James Morris <jmorris@...ei.org>,
	David Safford <safford@...son.ibm.com>,
	Mimi Zohar <zohar@...ibm.com>
Subject: Re: [PATCH] integrity: add ima_counts_put (updated) 

Mimi Zohar:
> This patch fixes an imbalance message as reported by J.R. Okajima.
> The IMA file counters are incremented in ima_path_check. If the
> actual open fails, such as ETXTBSY, decrement the counters to
> prevent unnecessary imbalance messages.

Unfortunately IMA seems to be still buggy.
may_open() calls ima_path_check() with IMA_COUNT_UPDATE, but may_open()
may fail later with several reasons such like, open-flag mismatch with
inode-flag, capability, the file was executing and get_write_access()
failed, etc.
In these cases, IMA has to maintain its counters too by calling
ima_counts_put() or something, does it?

J. R. Okajima
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