linux-kernel - [PATCH] IMA: do not measure everything opened by root by default

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Message-ID: <20090512191423.6903.37464.stgit@dhcp231-142.rdu.redhat.com>
Date:	Tue, 12 May 2009 15:14:23 -0400
From:	Eric Paris <eparis@...hat.com>
To:	zohar@...ux.vnet.ibm.com
Cc:	jmorris@...ei.org, linux-kernel@...r.kernel.org
Subject: [PATCH] IMA: do not measure everything opened by root by default

The IMA default policy measures every single file opened by root.  This is
terrible for most users.  Consider a system (like mine) with virtual machine
images.  When those images are touched (which happens at boot for me) those
images are measured.  This is just way too much for the default case.

Signed-off-by: Eric Paris <eparis@...hat.com>
---

 security/integrity/ima/ima_policy.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index b168c1d..dec6dcb 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -61,8 +61,6 @@ static struct ima_measure_rule_entry default_rules[] = {
 	 .flags = IMA_FUNC | IMA_MASK},
 	{.action = MEASURE,.func = BPRM_CHECK,.mask = MAY_EXEC,
 	 .flags = IMA_FUNC | IMA_MASK},
-	{.action = MEASURE,.func = PATH_CHECK,.mask = MAY_READ,.uid = 0,
-	 .flags = IMA_FUNC | IMA_MASK | IMA_UID}
 };
 
 static LIST_HEAD(measure_default_rules);

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