[PATCH v2 3/4] ima: Do not audit if CONFIG_INTEGRITY_AUDIT is not set

If Integrity is not auditing, IMA shouldn't audit, either. Signed-off-by: Stefan Berger <stefanb(a)linux.vnet.ibm.com&gt; --- security/integrity/ima/Kconfig | 1 + security/integrity/ima/ima_policy.c | 6 +++++- security/integrity/integrity.h | 15 +++++++++++++++ 3 files changed, 21 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig index 6a8f67714c83..94c2151331aa 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -12,6 +12,7 @@ config IMA select TCG_TIS if TCG_TPM && X86 select TCG_CRB if TCG_TPM && ACPI select TCG_IBMVTPM if TCG_TPM && PPC_PSERIES + select INTEGRITY_AUDIT if AUDIT help The Trusted Computing Group(TCG) runtime Integrity Measurement Architecture(IMA) maintains a list of hash diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 3fcf0935468c..bc99713dfe57 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -628,6 +628,9 @@ static int ima_lsm_rule_init(struct ima_rule_entry *entry, static void ima_log_string_op(struct audit_buffer *ab, char *key, char *value, bool (*rule_operator)(kuid_t, kuid_t)) { + if (!ab) + return; + if (rule_operator == &uid_gt) audit_log_format(ab, "%s>", key); else if (rule_operator == &uid_lt) @@ -649,7 +652,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) bool uid_token; int result = 0; - ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_INTEGRITY_RULE); + ab = integrity_audit_log_start(NULL, GFP_KERNEL, + AUDIT_INTEGRITY_RULE); entry->uid = INVALID_UID; entry->fowner = INVALID_UID; diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h index 0bb372eed62a..e60473b13a8d 100644 --- a/security/integrity/integrity.h +++ b/security/integrity/integrity.h @@ -15,6 +15,7 @@ #include <linux/integrity.h> #include <crypto/sha.h> #include <linux/key.h> +#include <linux/audit.h> /* iint action cache flags */ #define IMA_MEASURE 0x00000001 @@ -199,6 +200,13 @@ static inline void evm_load_x509(void) void integrity_audit_msg(int audit_msgno, struct inode *inode, const unsigned char *fname, const char *op, const char *cause, int result, int info); + +static inline struct audit_buffer * +integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type) +{ + return audit_log_start(ctx, gfp_mask, type); +} + #else static inline void integrity_audit_msg(int audit_msgno, struct inode *inode, const unsigned char *fname, @@ -206,4 +214,11 @@ static inline void integrity_audit_msg(int audit_msgno, struct inode *inode, int result, int info) { } + +static inline struct audit_buffer * +integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type) +{ + return NULL; +} + #endif -- 2.13.6