ima: audit is compiled only when enabled

IMA auditing code was compiled even when CONFIG_AUDIT was not enabled.
This patch compiles auditing code only when possible and enabled.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

4 files changed, 13 insertions, 5 deletions

diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index 35664fe6daa..b9c1219924f 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -38,8 +38,9 @@ config IMA_MEASURE_PCR_IDX
           measurement list.  If unsure, use the default 10.
 
 config IMA_AUDIT
-        bool
+        bool "Enables auditing support"
         depends on IMA
+        depends on AUDIT
         default y
         help
           This option adds a kernel parameter 'ima_audit', which
diff --git a/security/integrity/ima/Makefile b/security/integrity/ima/Makefile
index 5690c021de8..5f740f6971e 100644
--- a/security/integrity/ima/Makefile
+++ b/security/integrity/ima/Makefile
@@ -6,4 +6,5 @@
 obj-$(CONFIG_IMA) += ima.o
 
 ima-y := ima_fs.o ima_queue.o ima_init.o ima_main.o ima_crypto.o ima_api.o \
-         ima_policy.o ima_audit.o
+         ima_policy.o
+ima-$(CONFIG_IMA_AUDIT) += ima_audit.o
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 3ccf7acac6d..e7c99fd0d22 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -61,10 +61,19 @@ struct ima_queue_entry {
 };
 extern struct list_head ima_measurements;       /* list of all measurements */
 
+#ifdef CONFIG_IMA_AUDIT
 /* declarations */
 void integrity_audit_msg(int audit_msgno, struct inode *inode,
                          const unsigned char *fname, const char *op,
                          const char *cause, int result, int info);
+#else
+static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
+                                       const unsigned char *fname,
+                                       const char *op, const char *cause,
+                                       int result, int info)
+{
+}
+#endif
 
 /* Internal IMA function definitions */
 int ima_init(void);
diff --git a/security/integrity/ima/ima_audit.c b/security/integrity/ima/ima_audit.c
index 21e96bf188d..7a57f6769e9 100644
--- a/security/integrity/ima/ima_audit.c
+++ b/security/integrity/ima/ima_audit.c
@@ -17,8 +17,6 @@
 
 static int ima_audit;
 
-#ifdef CONFIG_IMA_AUDIT
-
 /* ima_audit_setup - enable informational auditing messages */
 static int __init ima_audit_setup(char *str)
 {
@@ -29,7 +27,6 @@ static int __init ima_audit_setup(char *str)
         return 1;
 }
 __setup("ima_audit=", ima_audit_setup);
-#endif
 
 void integrity_audit_msg(int audit_msgno, struct inode *inode,
                          const unsigned char *fname, const char *op,