linux-kernel - [PATCH] evm: EVM_LOAD

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Date:	Fri, 27 Nov 2015 14:52:33 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Dmitry Kasatkin <dmitry.kasatkin@...wei.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	linux-ima-devel@...ts.sourceforge.net,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] evm: EVM_LOAD_X509 depends on EVM

The newly added EVM_LOAD_X509 code can be configured even if
CONFIG_EVM is disabled, but that causes a link error:

security/built-in.o: In function `integrity_load_keys':
digsig_asymmetric.c:(.init.text+0x400): undefined reference to `evm_load_x509'

This adds a Kconfig dependency to ensure it is only enabled when
CONFIG_EVM is set as well.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 7f753c992343 ("evm: load x509 certificate from the kernel")
---
Found on yesterday's linux-next with ARM randconfig builds

diff --git a/security/integrity/evm/Kconfig b/security/integrity/evm/Kconfig
index b1433e9cd8cb..87e83adf4c6e 100644
--- a/security/integrity/evm/Kconfig
+++ b/security/integrity/evm/Kconfig
@@ -44,7 +44,7 @@ config EVM_EXTRA_SMACK_XATTRS
 
 config EVM_LOAD_X509
 	bool "Load X509 certificate to the '.evm' trusted keyring"
-	depends on INTEGRITY_TRUSTED_KEYRING
+	depends on EVM && INTEGRITY_TRUSTED_KEYRING
 	default n
 	help
 	   Load X509 certificate to the '.evm' trusted keyring.

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