Create real functions for the ima_filter_rule interfaces.
These replace #defines that obscure the reuse of audit
interfaces. The new fuctions are put in security.c because
they use security module registered hooks that we don't
want exported.
Signed-off-by: Casey Schaufler <[email protected]>
Acked-by: Paul Moore <[email protected]>
---
include/linux/security.h | 24 ++++++++++++++++++++++++
security/integrity/ima/ima.h | 26 --------------------------
security/security.c | 21 +++++++++++++++++++++
3 files changed, 45 insertions(+), 26 deletions(-)
diff --git a/include/linux/security.h b/include/linux/security.h
index 25b3ef71f495..2986342dad41 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1917,6 +1917,30 @@ static inline void security_audit_rule_free(void *lsmrule)
#endif /* CONFIG_SECURITY */
#endif /* CONFIG_AUDIT */
+#if defined(CONFIG_IMA_LSM_RULES) && defined(CONFIG_SECURITY)
+int ima_filter_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule);
+int ima_filter_rule_match(u32 secid, u32 field, u32 op, void *lsmrule);
+void ima_filter_rule_free(void *lsmrule);
+
+#else
+
+static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr,
+ void **lsmrule)
+{
+ return 0;
+}
+
+static inline int ima_filter_rule_match(u32 secid, u32 field, u32 op,
+ void *lsmrule)
+{
+ return 0;
+}
+
+static inline void ima_filter_rule_free(void *lsmrule)
+{ }
+
+#endif /* defined(CONFIG_IMA_LSM_RULES) && defined(CONFIG_SECURITY) */
+
#ifdef CONFIG_SECURITYFS
extern struct dentry *securityfs_create_file(const char *name, umode_t mode,
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index be965a8715e4..1b5d70ac2dc9 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -418,32 +418,6 @@ static inline void ima_free_modsig(struct modsig *modsig)
}
#endif /* CONFIG_IMA_APPRAISE_MODSIG */
-/* LSM based policy rules require audit */
-#ifdef CONFIG_IMA_LSM_RULES
-
-#define ima_filter_rule_init security_audit_rule_init
-#define ima_filter_rule_free security_audit_rule_free
-#define ima_filter_rule_match security_audit_rule_match
-
-#else
-
-static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr,
- void **lsmrule)
-{
- return -EINVAL;
-}
-
-static inline void ima_filter_rule_free(void *lsmrule)
-{
-}
-
-static inline int ima_filter_rule_match(u32 secid, u32 field, u32 op,
- void *lsmrule)
-{
- return -EINVAL;
-}
-#endif /* CONFIG_IMA_LSM_RULES */
-
#ifdef CONFIG_IMA_READ_POLICY
#define POLICY_FILE_FLAGS (S_IWUSR | S_IRUSR)
#else
diff --git a/security/security.c b/security/security.c
index b7cf5cbfdc67..22543fdb6041 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2586,6 +2586,27 @@ int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
}
#endif /* CONFIG_AUDIT */
+#ifdef CONFIG_IMA_LSM_RULES
+/*
+ * The integrity subsystem uses the same hooks as
+ * the audit subsystem.
+ */
+int ima_filter_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
+{
+ return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
+}
+
+void ima_filter_rule_free(void *lsmrule)
+{
+ call_void_hook(audit_rule_free, lsmrule);
+}
+
+int ima_filter_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
+{
+ return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
+}
+#endif /* CONFIG_IMA_LSM_RULES */
+
#ifdef CONFIG_BPF_SYSCALL
int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
{
--
2.35.1
On 4/18/22 07:59, Casey Schaufler wrote:
> Create real functions for the ima_filter_rule interfaces.
> These replace #defines that obscure the reuse of audit
> interfaces. The new fuctions are put in security.c because
> they use security module registered hooks that we don't
> want exported.
>
> Signed-off-by: Casey Schaufler <[email protected]>
> Acked-by: Paul Moore <[email protected]>
Reviewed-by: John Johansen <[email protected]>
> ---
> include/linux/security.h | 24 ++++++++++++++++++++++++
> security/integrity/ima/ima.h | 26 --------------------------
> security/security.c | 21 +++++++++++++++++++++
> 3 files changed, 45 insertions(+), 26 deletions(-)
>
> diff --git a/include/linux/security.h b/include/linux/security.h
> index 25b3ef71f495..2986342dad41 100644
> --- a/include/linux/security.h
> +++ b/include/linux/security.h
> @@ -1917,6 +1917,30 @@ static inline void security_audit_rule_free(void *lsmrule)
> #endif /* CONFIG_SECURITY */
> #endif /* CONFIG_AUDIT */
>
> +#if defined(CONFIG_IMA_LSM_RULES) && defined(CONFIG_SECURITY)
> +int ima_filter_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule);
> +int ima_filter_rule_match(u32 secid, u32 field, u32 op, void *lsmrule);
> +void ima_filter_rule_free(void *lsmrule);
> +
> +#else
> +
> +static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr,
> + void **lsmrule)
> +{
> + return 0;
> +}
> +
> +static inline int ima_filter_rule_match(u32 secid, u32 field, u32 op,
> + void *lsmrule)
> +{
> + return 0;
> +}
> +
> +static inline void ima_filter_rule_free(void *lsmrule)
> +{ }
> +
> +#endif /* defined(CONFIG_IMA_LSM_RULES) && defined(CONFIG_SECURITY) */
> +
> #ifdef CONFIG_SECURITYFS
>
> extern struct dentry *securityfs_create_file(const char *name, umode_t mode,
> diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
> index be965a8715e4..1b5d70ac2dc9 100644
> --- a/security/integrity/ima/ima.h
> +++ b/security/integrity/ima/ima.h
> @@ -418,32 +418,6 @@ static inline void ima_free_modsig(struct modsig *modsig)
> }
> #endif /* CONFIG_IMA_APPRAISE_MODSIG */
>
> -/* LSM based policy rules require audit */
> -#ifdef CONFIG_IMA_LSM_RULES
> -
> -#define ima_filter_rule_init security_audit_rule_init
> -#define ima_filter_rule_free security_audit_rule_free
> -#define ima_filter_rule_match security_audit_rule_match
> -
> -#else
> -
> -static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr,
> - void **lsmrule)
> -{
> - return -EINVAL;
> -}
> -
> -static inline void ima_filter_rule_free(void *lsmrule)
> -{
> -}
> -
> -static inline int ima_filter_rule_match(u32 secid, u32 field, u32 op,
> - void *lsmrule)
> -{
> - return -EINVAL;
> -}
> -#endif /* CONFIG_IMA_LSM_RULES */
> -
> #ifdef CONFIG_IMA_READ_POLICY
> #define POLICY_FILE_FLAGS (S_IWUSR | S_IRUSR)
> #else
> diff --git a/security/security.c b/security/security.c
> index b7cf5cbfdc67..22543fdb6041 100644
> --- a/security/security.c
> +++ b/security/security.c
> @@ -2586,6 +2586,27 @@ int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
> }
> #endif /* CONFIG_AUDIT */
>
> +#ifdef CONFIG_IMA_LSM_RULES
> +/*
> + * The integrity subsystem uses the same hooks as
> + * the audit subsystem.
> + */
> +int ima_filter_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
> +{
> + return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
> +}
> +
> +void ima_filter_rule_free(void *lsmrule)
> +{
> + call_void_hook(audit_rule_free, lsmrule);
> +}
> +
> +int ima_filter_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
> +{
> + return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
> +}
> +#endif /* CONFIG_IMA_LSM_RULES */
> +
> #ifdef CONFIG_BPF_SYSCALL
> int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
> {