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From: Mimi Zohar <zohar@linux.ibm.com>
To: Roberto Sassu <roberto.sassu@huawei.com>,
	"paul@paul-moore.com" <paul@paul-moore.com>
Cc: "stephen.smalley.work@gmail.com" <stephen.smalley.work@gmail.com>,
	"prsriva02@gmail.com" <prsriva02@gmail.com>,
	"tusharsu@linux.microsoft.com" <tusharsu@linux.microsoft.com>,
	"nramas@linux.microsoft.com" <nramas@linux.microsoft.com>,
	"linux-integrity@vger.kernel.org"
	<linux-integrity@vger.kernel.org>,
	"linux-security-module@vger.kernel.org" 
	<linux-security-module@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"selinux@vger.kernel.org" <selinux@vger.kernel.org>
Subject: Re: [PATCH v3 2/3] ima: Return int in the functions to measure a buffer
Date: Tue, 20 Jul 2021 09:01:50 -0400	[thread overview]
Message-ID: <999c3297f71e5f7d69b555bc8c999729e8b1ae31.camel@linux.ibm.com> (raw)
In-Reply-To: <bd953894da3041d5969da645db2f982e@huawei.com>

On Tue, 2021-07-20 at 12:38 +0000, Roberto Sassu wrote:
> > > This patch modifies the return type from void to int, and returns 0 if the
> > > buffer has been successfully measured, a negative value otherwise.
> > 
> > Needed here is an explanation as to why ima_measure_critical_data() is
> > special.
> 
> We don't want to unnecessarily calculate the digest twice.

That's what the "iint" cache is for.  .  This needs more a of an
explaintion as to why  ima_measure_critical_data() is special.

thanks,

Mimi


  reply	other threads:[~2021-07-20 13:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-05  9:09 [PATCH v3 0/3] ima: Provide more info about buffer measurement Roberto Sassu
2021-07-05  9:09 ` [PATCH v3 1/3] ima: Introduce ima_get_current_hash_algo() Roberto Sassu
2021-07-05  9:09 ` [PATCH v3 2/3] ima: Return int in the functions to measure a buffer Roberto Sassu
2021-07-06 19:21   ` Lakshmi Ramasubramanian
2021-07-19 20:28   ` Mimi Zohar
2021-07-20 12:38     ` Roberto Sassu
2021-07-20 13:01       ` Mimi Zohar [this message]
2021-07-05  9:09 ` [PATCH v3 3/3] ima: Add digest and digest_len params to " Roberto Sassu
2021-07-06 19:24   ` Lakshmi Ramasubramanian
2021-07-13  2:40   ` Paul Moore
2021-07-19 20:59   ` Mimi Zohar

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