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Thu, 14 Jan 2021 02:09:24 +0000 (GMT) Received: from li-f45666cc-3089-11b2-a85c-c57d1a57929f.ibm.com (unknown [9.160.57.196]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 14 Jan 2021 02:09:24 +0000 (GMT) Message-ID: <73a82dff7be151298f51c0db6f3c4996ccf44a19.camel@linux.ibm.com> Subject: Re: [PATCH v10 5/8] IMA: limit critical data measurement based on a label From: Mimi Zohar To: Tushar Sugandhi , stephen.smalley.work@gmail.com, casey@schaufler-ca.com, agk@redhat.com, snitzer@redhat.com, gmazyland@gmail.com, paul@paul-moore.com Cc: tyhicks@linux.microsoft.com, sashal@kernel.org, jmorris@namei.org, nramas@linux.microsoft.com, linux-integrity@vger.kernel.org, selinux@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, dm-devel@redhat.com Date: Wed, 13 Jan 2021 21:09:23 -0500 In-Reply-To: <20210108040708.8389-6-tusharsu@linux.microsoft.com> References: <20210108040708.8389-1-tusharsu@linux.microsoft.com> <20210108040708.8389-6-tusharsu@linux.microsoft.com> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.28.5 (3.28.5-14.el8) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-13_14:2021-01-13,2021-01-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 mlxscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 mlxlogscore=999 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101140003 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2021-01-07 at 20:07 -0800, Tushar Sugandhi wrote: > Integrity critical data may belong to a single subsystem or it may > arise from cross subsystem interaction. Currently there is no mechanism > to group or limit the data based on certain label. Limiting and > grouping critical data based on a label would make it flexible and > configurable to measure. > > Define "label:=", a new IMA policy condition, for the IMA func > CRITICAL_DATA to allow grouping and limiting measurement of integrity > critical data. > > Limit the measurement to the labels that are specified in the IMA > policy - CRITICAL_DATA+"label:=". If "label:=" is not provided with > the func CRITICAL_DATA, measure all the input integrity critical data. > > Signed-off-by: Tushar Sugandhi > Reviewed-by: Tyler Hicks This is looking a lot better. thanks, Mimi