[RFC PATCH v4 15/19] lsm: Support logging socket common data

[Mikhail Ivanov]

Add LSM_AUDIT_DATA_SOCKET type to log socket-related data in
audit_log_lsm_data(). This may be useful (for example) to log socket
creation denials.

Signed-off-by: Mikhail Ivanov <ivanov.mikhail1 at huawei-partners.com>
---
 include/linux/lsm_audit.h | 8 ++++++++
 security/lsm_audit.c      | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index 382c56a97bba..7c7617df41b5 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -57,6 +57,12 @@ struct lsm_ibendport_audit {
 	u8 port;
 };
 
+struct lsm_socket_audit {
+	s32 family;
+	s32 type;
+	s32 protocol;
+};
+
 /* Auxiliary data to use in generating the audit record. */
 struct common_audit_data {
 	char type;
@@ -78,6 +84,7 @@ struct common_audit_data {
 #define LSM_AUDIT_DATA_NOTIFICATION 16
 #define LSM_AUDIT_DATA_ANONINODE	17
 #define LSM_AUDIT_DATA_NLMSGTYPE	18
+#define LSM_AUDIT_DATA_SOCKET	19
 	union 	{
 		struct path path;
 		struct dentry *dentry;
@@ -97,6 +104,7 @@ struct common_audit_data {
 		struct file *file;
 		struct lsm_ibpkey_audit *ibpkey;
 		struct lsm_ibendport_audit *ibendport;
+		struct lsm_socket_audit *socket;
 		int reason;
 		const char *anonclass;
 		u16 nlmsg_type;
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 7d623b00495c..7e18241290ce 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -403,6 +403,10 @@ void audit_log_lsm_data(struct audit_buffer *ab,
 	case LSM_AUDIT_DATA_NLMSGTYPE:
 		audit_log_format(ab, " nl-msgtype=%hu", a->u.nlmsg_type);
 		break;
+	case LSM_AUDIT_DATA_SOCKET:
+		audit_log_format(ab, " family=%d sock_type=%d protocol=%d",
+			a->u.socket->family, a->u.socket->type, a->u.socket->protocol);
+		break;
 	} /* switch (a->type) */
 }
 
-- 
2.34.1