linux-kernel - [PATCH] x86/ima: fix the Kconfig dependency for IMA_ARCH

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Date:   Fri,  7 Jun 2019 15:12:06 -0400
From:   Nayna Jain <nayna@...ux.ibm.com>
To:     linux-integrity@...r.kernel.org
Cc:     zohar@...ux.ibm.com, linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, Nayna Jain <nayna@...ux.ibm.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Dave Young <dyoung@...hat.com>
Subject: [PATCH] x86/ima: fix the Kconfig dependency for IMA_ARCH_POLICY

If enabled, ima arch specific policies always adds the measurements rules,
this makes it dependent on CONFIG_IMA. CONFIG_IMA_APPRAISE implicitly takes
care of this, however it is needed explicitly for CONFIG_KEXEC_VERIFY_SIG.

This patch adds the CONFIG_IMA dependency in combination with
CONFIG_KEXEC_VERIFY_SIG for CONFIG_IMA_ARCH_POLICY

Fixes: d958083a8f640 (x86/ima: define arch_get_ima_policy() for x86)
Signed-off-by: Nayna Jain <nayna@...ux.ibm.com>
Cc: Eric Biederman <ebiederm@...ssion.com>
Cc: Dave Young <dyoung@...hat.com>
---
 security/integrity/ima/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index a18f8c6d13b5..df65d2d41905 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -159,7 +159,8 @@ config IMA_APPRAISE
 
 config IMA_ARCH_POLICY
         bool "Enable loading an IMA architecture specific policy"
-        depends on KEXEC_VERIFY_SIG || IMA_APPRAISE && INTEGRITY_ASYMMETRIC_KEYS
+        depends on (KEXEC_VERIFY_SIG && IMA) || IMA_APPRAISE \
+		   && INTEGRITY_ASYMMETRIC_KEYS
         default n
         help
           This option enables loading an IMA architecture specific policy
-- 
2.17.1