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Subject: [PATCH 19/23] LSM: Use multiple secids in LSM interfaces
To:     LSM <linux-security-module@vger.kernel.org>,
        LKLM <linux-kernel@vger.kernel.org>,
        Paul Moore <paul@paul-moore.com>,
        Stephen Smalley <sds@tycho.nsa.gov>,
        SE Linux <selinux@tycho.nsa.gov>,
        "SMACK-discuss@lists.01.org" <SMACK-discuss@lists.01.org>,
        John Johansen <john.johansen@canonical.com>,
        Kees Cook <keescook@chromium.org>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
        James Morris <jmorris@namei.org>
References: <7e8702ce-2598-e0a3-31a2-bc29157fb73d@schaufler-ca.com>
From:   Casey Schaufler <casey@schaufler-ca.com>
Message-ID: <9b098053-da53-da5a-cda5-72c68bd3d051@schaufler-ca.com>
Date:   Thu, 10 May 2018 17:55:42 -0700
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From: Casey Schaufler <casey@schaufler-ca.com>
Date: Thu, 10 May 2018 15:41:54 -0700
Subject: [PATCH 19/23] LSM: Use multiple secids in LSM interfaces

This is the second of two parts required to change the
security module infrastructure from using a u32 to
identify extended security attributes.

There's a little bit of stubbing at this point because
the "struct secid" is in fact a union of u32 entries,
and you can only use one at a time.

Because the security API is used in many interesting ways
(audit, file systems, and a variety of networking) the
change hits a lot of places.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
 include/linux/cred.h                    |   3 +-
 include/linux/security.h                |  75 +++++++++++--------
 include/net/scm.h                       |   4 +-
 kernel/audit.c                          |  23 +++---
 kernel/audit.h                          |   9 +--
 kernel/auditfilter.c                    |   4 +-
 kernel/auditsc.c                        |  42 ++++++-----
 kernel/cred.c                           |   6 +-
 net/ipv4/ip_sockglue.c                  |   6 +-
 net/netfilter/nf_conntrack_netlink.c    |  12 +++-
 net/netfilter/nf_conntrack_standalone.c |   6 +-
 net/netfilter/nfnetlink_queue.c         |   9 ++-
 net/netfilter/xt_SECMARK.c              |   7 +-
 net/netlabel/netlabel_kapi.c            |   2 +-
 net/netlabel/netlabel_unlabeled.c       |  31 ++++----
 net/netlabel/netlabel_unlabeled.h       |   2 +-
 net/netlabel/netlabel_user.c            |   2 +-
 net/netlabel/netlabel_user.h            |   2 +-
 net/unix/af_unix.c                      |   6 +-
 net/xfrm/xfrm_policy.c                  |   6 +-
 net/xfrm/xfrm_state.c                   |   2 +-
 security/integrity/ima/ima.h            |  10 +--
 security/integrity/ima/ima_api.c        |   5 +-
 security/integrity/ima/ima_appraise.c   |   4 +-
 security/integrity/ima/ima_main.c       |  22 +++---
 security/integrity/ima/ima_policy.c     |  11 +--
 security/security.c                     | 124 +++++++++++---------------------
 27 files changed, 221 insertions(+), 214 deletions(-)

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 631286535d0f..217814eb1925 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -23,6 +23,7 @@
 
 struct cred;
 struct inode;
+struct secids;
 
 /*
  * COW Supplementary groups list
@@ -161,7 +162,7 @@ extern const struct cred *override_creds(const struct cred *);
 extern void revert_creds(const struct cred *);
 extern struct cred *prepare_kernel_cred(struct task_struct *);
 extern int change_create_files_as(struct cred *, struct inode *);
-extern int set_security_override(struct cred *, u32);
+extern int set_security_override(struct cred *cred, struct secids *secid);
 extern int set_security_override_from_ctx(struct cred *, const char *);
 extern int set_create_files_as(struct cred *, struct inode *);
 extern void __init cred_init(void);
diff --git a/include/linux/security.h b/include/linux/security.h
index f16c33320792..ab70064c283f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -330,7 +330,7 @@ int security_inode_killpriv(struct dentry *dentry);
 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc);
 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size);
-void security_inode_getsecid(struct inode *inode, u32 *secid);
+void security_inode_getsecid(struct inode *inode, struct secids *secid);
 int security_inode_copy_up(struct dentry *src, struct cred **new);
 int security_inode_copy_up_xattr(const char *name);
 int security_file_permission(struct file *file, int mask);
@@ -355,8 +355,8 @@ int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
 void security_cred_free(struct cred *cred);
 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp);
 void security_transfer_creds(struct cred *new, const struct cred *old);
-void security_cred_getsecid(const struct cred *c, u32 *secid);
-int security_kernel_act_as(struct cred *new, u32 secid);
+void security_cred_getsecid(const struct cred *c, struct secids *secid);
+int security_kernel_act_as(struct cred *new, struct secids *secid);
 int security_kernel_create_files_as(struct cred *new, struct inode *inode);
 int security_kernel_module_request(char *kmod_name);
 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id);
@@ -367,7 +367,7 @@ int security_task_fix_setuid(struct cred *new, const struct cred *old,
 int security_task_setpgid(struct task_struct *p, pid_t pgid);
 int security_task_getpgid(struct task_struct *p);
 int security_task_getsid(struct task_struct *p);
-void security_task_getsecid(struct task_struct *p, u32 *secid);
+void security_task_getsecid(struct task_struct *p, struct secids *secid);
 int security_task_setnice(struct task_struct *p, int nice);
 int security_task_setioprio(struct task_struct *p, int ioprio);
 int security_task_getioprio(struct task_struct *p);
@@ -384,7 +384,7 @@ int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 			unsigned long arg4, unsigned long arg5);
 void security_task_to_inode(struct task_struct *p, struct inode *inode);
 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
-void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
+void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct secids *secid);
 int security_msg_msg_alloc(struct msg_msg *msg);
 void security_msg_msg_free(struct msg_msg *msg);
 int security_msg_queue_alloc(struct kern_ipc_perm *msq);
@@ -413,8 +413,9 @@ int security_setprocattr(const char *lsm, const char *name, void *value,
 			 size_t size);
 int security_netlink_send(struct sock *sk, struct sk_buff *skb);
 int security_ismaclabel(const char *name);
-int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
-int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
+int security_secid_to_secctx(struct secids *secid, char **secdata, u32 *seclen);
+int security_secctx_to_secid(const char *secdata, u32 seclen,
+				struct secids *secid);
 void security_release_secctx(char *secdata, u32 seclen);
 
 void security_inode_invalidate_secctx(struct inode *inode);
@@ -819,9 +820,10 @@ static inline int security_inode_listsecurity(struct inode *inode, char *buffer,
 	return 0;
 }
 
-static inline void security_inode_getsecid(struct inode *inode, u32 *secid)
+static inline void security_inode_getsecid(struct inode *inode,
+					   struct secids *secid)
 {
-	*secid = 0;
+	secid->secmark = 0;
 }
 
 static inline int security_inode_copy_up(struct dentry *src, struct cred **new)
@@ -934,7 +936,8 @@ static inline void security_transfer_creds(struct cred *new,
 {
 }
 
-static inline int security_kernel_act_as(struct cred *cred, u32 secid)
+static inline int security_kernel_act_as(struct cred *cred,
+					 struct secids *secid)
 {
 	return 0;
 }
@@ -985,9 +988,10 @@ static inline int security_task_getsid(struct task_struct *p)
 	return 0;
 }
 
-static inline void security_task_getsecid(struct task_struct *p, u32 *secid)
+static inline void security_task_getsecid(struct task_struct *p,
+					  struct secids *secid)
 {
-	*secid = 0;
+	secid->secmark = 0;
 }
 
 static inline int security_task_setnice(struct task_struct *p, int nice)
@@ -1058,9 +1062,10 @@ static inline int security_ipc_permission(struct kern_ipc_perm *ipcp,
 	return 0;
 }
 
-static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp,
+					 struct secids *secid)
 {
-	*secid = 0;
+	secid->secmark = 0;
 }
 
 static inline int security_msg_msg_alloc(struct msg_msg *msg)
@@ -1180,14 +1185,15 @@ static inline int security_ismaclabel(const char *name)
 	return 0;
 }
 
-static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
+static inline int security_secid_to_secctx(struct secids *secid,
+					   char **secdata, u32 *seclen)
 {
 	return -EOPNOTSUPP;
 }
 
 static inline int security_secctx_to_secid(const char *secdata,
 					   u32 seclen,
-					   u32 *secid)
+					   struct secids *secid)
 {
 	return -EOPNOTSUPP;
 }
@@ -1236,7 +1242,8 @@ int security_socket_shutdown(struct socket *sock, int how);
 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb);
 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
 				      int __user *optlen, unsigned len);
-int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid);
+int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb,
+				     struct secids *secid);
 int security_sk_alloc(struct sock *sk, int family, gfp_t priority);
 void security_sk_free(struct sock *sk);
 void security_sk_clone(const struct sock *sk, struct sock *newsk);
@@ -1249,7 +1256,7 @@ void security_inet_csk_clone(struct sock *newsk,
 			const struct request_sock *req);
 void security_inet_conn_established(struct sock *sk,
 			struct sk_buff *skb);
-int security_secmark_relabel_packet(u32 secid);
+int security_secmark_relabel_packet(struct secids *secid);
 void security_secmark_refcount_inc(void);
 void security_secmark_refcount_dec(void);
 int security_tun_dev_alloc_security(void **security);
@@ -1368,7 +1375,9 @@ static inline int security_socket_getpeersec_stream(struct socket *sock, char __
 	return -ENOPROTOOPT;
 }
 
-static inline int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
+static inline int security_socket_getpeersec_dgram(struct socket *sock,
+						   struct sk_buff *skb,
+						   struct secids *secid)
 {
 	return -ENOPROTOOPT;
 }
@@ -1414,7 +1423,7 @@ static inline void security_inet_conn_established(struct sock *sk,
 {
 }
 
-static inline int security_secmark_relabel_packet(u32 secid)
+static inline int security_secmark_relabel_packet(struct secids *secid)
 {
 	return 0;
 }
@@ -1511,14 +1520,16 @@ void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
 int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx);
 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
-				      struct xfrm_sec_ctx *polsec, u32 secid);
+				      struct xfrm_sec_ctx *polsec,
+				      const struct secids *secid);
 int security_xfrm_state_delete(struct xfrm_state *x);
 void security_xfrm_state_free(struct xfrm_state *x);
-int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
+int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
+					struct secids *fl_secid, u8 dir);
 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
 				       struct xfrm_policy *xp,
 				       const struct flowi *fl);
-int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid);
+int security_xfrm_decode_session(struct sk_buff *skb, struct secids *secid);
 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl);
 
 #else	/* CONFIG_SECURITY_NETWORK_XFRM */
@@ -1551,7 +1562,8 @@ static inline int security_xfrm_state_alloc(struct xfrm_state *x,
 }
 
 static inline int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
-					struct xfrm_sec_ctx *polsec, u32 secid)
+						struct xfrm_sec_ctx *polsec,
+						const struct secids *secid)
 {
 	return 0;
 }
@@ -1565,7 +1577,8 @@ static inline int security_xfrm_state_delete(struct xfrm_state *x)
 	return 0;
 }
 
-static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
+static inline int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
+					struct secids *fl_secid, u8 dir)
 {
 	return 0;
 }
@@ -1576,7 +1589,8 @@ static inline int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
 	return 1;
 }
 
-static inline int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
+static inline int security_xfrm_decode_session(struct sk_buff *skb,
+					       struct secids *secid)
 {
 	return 0;
 }
@@ -1712,8 +1726,8 @@ static inline int security_key_getsecurity(struct key *key, char **_buffer)
 #ifdef CONFIG_SECURITY
 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule);
 int security_audit_rule_known(struct audit_krule *krule);
-int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
-			      struct audit_context *actx);
+int security_audit_rule_match(struct secids *secid, u32 field, u32 op,
+			      void *lsmrule, struct audit_context *actx);
 void security_audit_rule_free(void *lsmrule);
 
 #else
@@ -1729,8 +1743,9 @@ static inline int security_audit_rule_known(struct audit_krule *krule)
 	return 0;
 }
 
-static inline int security_audit_rule_match(u32 secid, u32 field, u32 op,
-				   void *lsmrule, struct audit_context *actx)
+static inline int security_audit_rule_match(struct secids *secid, u32 field,
+					    u32 op, void *lsmrule,
+					    struct audit_context *actx)
 {
 	return 0;
 }
diff --git a/include/net/scm.h b/include/net/scm.h
index 903771c8d4e3..292575f75201 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -32,7 +32,7 @@ struct scm_cookie {
 	struct scm_fp_list	*fp;		/* Passed files		*/
 	struct scm_creds	creds;		/* Skb credentials	*/
 #ifdef CONFIG_SECURITY_NETWORK
-	u32			secid;		/* Passed security ID 	*/
+	struct secids		secid;		/* Passed security ID	*/
 #endif
 };
 
@@ -96,7 +96,7 @@ static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct sc
 	int err;
 
 	if (test_bit(SOCK_PASSSEC, &sock->flags)) {
-		err = security_secid_to_secctx(scm->secid, &secdata, &seclen);
+		err = security_secid_to_secctx(&scm->secid, &secdata, &seclen);
 
 		if (!err) {
 			put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata);
diff --git a/kernel/audit.c b/kernel/audit.c
index 670665c6e2a6..0c424f107b0c 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -141,7 +141,7 @@ static u32	audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
 /* The identity of the user shutting down the audit system. */
 kuid_t		audit_sig_uid = INVALID_UID;
 pid_t		audit_sig_pid = -1;
-u32		audit_sig_sid = 0;
+struct secids	audit_sig_sid;
 
 /* Records can be lost in several ways:
    0) [suppressed in audit_alloc]
@@ -1421,20 +1421,21 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 	case AUDIT_SIGNAL_INFO:
 		len = 0;
-		if (audit_sig_sid) {
-			err = security_secid_to_secctx(audit_sig_sid, &ctx, &len);
+		if (secid_valid(&audit_sig_sid)) {
+			err = security_secid_to_secctx(&audit_sig_sid, &ctx,
+							&len);
 			if (err)
 				return err;
 		}
 		sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL);
 		if (!sig_data) {
-			if (audit_sig_sid)
+			if (secid_valid(&audit_sig_sid))
 				security_release_secctx(ctx, len);
 			return -ENOMEM;
 		}
 		sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid);
 		sig_data->pid = audit_sig_pid;
-		if (audit_sig_sid) {
+		if (secid_valid(&audit_sig_sid)) {
 			memcpy(sig_data->ctx, ctx, len);
 			security_release_secctx(ctx, len);
 		}
@@ -2166,12 +2167,12 @@ void audit_log_name(struct audit_context *context, struct audit_names *n,
 				 from_kgid(&init_user_ns, n->gid),
 				 MAJOR(n->rdev),
 				 MINOR(n->rdev));
-	if (n->osid != 0) {
+	if (secid_valid(&n->osid)) {
 		char *ctx = NULL;
 		u32 len;
 		if (security_secid_to_secctx(
-			n->osid, &ctx, &len)) {
-			audit_log_format(ab, " osid=%u", n->osid);
+			&n->osid, &ctx, &len)) {
+			audit_log_format(ab, " osid=%u", n->osid.secmark);
 			if (call_panic)
 				*call_panic = 2;
 		} else {
@@ -2209,13 +2210,13 @@ int audit_log_task_context(struct audit_buffer *ab)
 	char *ctx = NULL;
 	unsigned len;
 	int error;
-	u32 sid;
+	struct secids sid;
 
 	security_task_getsecid(current, &sid);
-	if (!sid)
+	if (!secid_valid(&sid))
 		return 0;
 
-	error = security_secid_to_secctx(sid, &ctx, &len);
+	error = security_secid_to_secctx(&sid, &ctx, &len);
 	if (error) {
 		if (error != -EINVAL)
 			goto error_path;
diff --git a/kernel/audit.h b/kernel/audit.h
index 214e14948370..246a4721577d 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -21,6 +21,7 @@
 
 #include <linux/fs.h>
 #include <linux/audit.h>
+#include <linux/security.h>
 #include <linux/skbuff.h>
 #include <uapi/linux/mqueue.h>
 #include <linux/tty.h>
@@ -89,7 +90,7 @@ struct audit_names {
 	kuid_t			uid;
 	kgid_t			gid;
 	dev_t			rdev;
-	u32			osid;
+	struct secids		osid;
 	struct audit_cap_data	fcap;
 	unsigned int		fcap_ver;
 	unsigned char		type;		/* record type */
@@ -146,7 +147,7 @@ struct audit_context {
 	kuid_t		    target_auid;
 	kuid_t		    target_uid;
 	unsigned int	    target_sessionid;
-	u32		    target_sid;
+	struct secids	    target_sid;
 	char		    target_comm[TASK_COMM_LEN];
 
 	struct audit_tree_refs *trees, *first_trees;
@@ -163,7 +164,7 @@ struct audit_context {
 			kuid_t			uid;
 			kgid_t			gid;
 			umode_t			mode;
-			u32			osid;
+			struct secids		osid;
 			int			has_perm;
 			uid_t			perm_uid;
 			gid_t			perm_gid;
@@ -328,7 +329,7 @@ extern char *audit_unpack_string(void **bufp, size_t *remain, size_t len);
 
 extern pid_t audit_sig_pid;
 extern kuid_t audit_sig_uid;
-extern u32 audit_sig_sid;
+extern struct secids audit_sig_sid;
 
 extern int audit_filter(int msgtype, unsigned int listtype);
 
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index d7a807e81451..d3e5ef7656c7 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1327,7 +1327,7 @@ int audit_filter(int msgtype, unsigned int listtype)
 		for (i = 0; i < e->rule.field_count; i++) {
 			struct audit_field *f = &e->rule.fields[i];
 			pid_t pid;
-			u32 sid;
+			struct secids sid;
 
 			switch (f->type) {
 			case AUDIT_PID:
@@ -1358,7 +1358,7 @@ int audit_filter(int msgtype, unsigned int listtype)
 			case AUDIT_SUBJ_CLR:
 				if (f->lsm_rule) {
 					security_task_getsecid(current, &sid);
-					result = security_audit_rule_match(sid,
+					result = security_audit_rule_match(&sid,
 							f->type, f->op, f->lsm_rule, NULL);
 				}
 				break;
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 4e0a4ac803db..3ff9a59127ba 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -112,7 +112,7 @@ struct audit_aux_data_pids {
 	kuid_t			target_auid[AUDIT_AUX_PIDS];
 	kuid_t			target_uid[AUDIT_AUX_PIDS];
 	unsigned int		target_sessionid[AUDIT_AUX_PIDS];
-	u32			target_sid[AUDIT_AUX_PIDS];
+	struct secids		target_sid[AUDIT_AUX_PIDS];
 	char 			target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
 	int			pid_count;
 };
@@ -446,10 +446,11 @@ static int audit_filter_rules(struct task_struct *tsk,
 {
 	const struct cred *cred;
 	int i, need_sid = 1;
-	u32 sid;
+	struct secids sid;
 	unsigned int sessionid;
 
-	cred = rcu_dereference_check(tsk->cred, tsk == current || task_creation);
+	cred = rcu_dereference_check(tsk->cred,
+					tsk == current || task_creation);
 
 	for (i = 0; i < rule->field_count; i++) {
 		struct audit_field *f = &rule->fields[i];
@@ -629,7 +630,8 @@ static int audit_filter_rules(struct task_struct *tsk,
 					security_task_getsecid(tsk, &sid);
 					need_sid = 0;
 				}
-				result = security_audit_rule_match(sid, f->type,
+				result = security_audit_rule_match(&sid,
+								  f->type,
 				                                  f->op,
 				                                  f->lsm_rule,
 				                                  ctx);
@@ -646,13 +648,17 @@ static int audit_filter_rules(struct task_struct *tsk,
 				/* Find files that match */
 				if (name) {
 					result = security_audit_rule_match(
-					           name->osid, f->type, f->op,
+						   &name->osid, f->type, f->op,
 					           f->lsm_rule, ctx);
 				} else if (ctx) {
-					list_for_each_entry(n, &ctx->names_list, list) {
-						if (security_audit_rule_match(n->osid, f->type,
-									      f->op, f->lsm_rule,
-									      ctx)) {
+					list_for_each_entry(n, &ctx->names_list,
+							list) {
+						if (security_audit_rule_match(
+								&n->osid,
+								f->type,
+								f->op,
+								f->lsm_rule,
+								ctx)) {
 							++result;
 							break;
 						}
@@ -661,7 +667,7 @@ static int audit_filter_rules(struct task_struct *tsk,
 				/* Find ipc objects that match */
 				if (!ctx || ctx->type != AUDIT_IPC)
 					break;
-				if (security_audit_rule_match(ctx->ipc.osid,
+				if (security_audit_rule_match(&ctx->ipc.osid,
 							      f->type, f->op,
 							      f->lsm_rule, ctx))
 					++result;
@@ -969,7 +975,7 @@ static inline void audit_free_context(struct audit_context *context)
 
 static int audit_log_pid_context(struct audit_context *context, pid_t pid,
 				 kuid_t auid, kuid_t uid, unsigned int sessionid,
-				 u32 sid, char *comm)
+				 struct secids *sid, char *comm)
 {
 	struct audit_buffer *ab;
 	char *ctx = NULL;
@@ -1191,17 +1197,17 @@ static void show_special(struct audit_context *context, int *call_panic)
 				context->socketcall.args[i]);
 		break; }
 	case AUDIT_IPC: {
-		u32 osid = context->ipc.osid;
+		struct secids osid = context->ipc.osid;
 
 		audit_log_format(ab, "ouid=%u ogid=%u mode=%#ho",
 				 from_kuid(&init_user_ns, context->ipc.uid),
 				 from_kgid(&init_user_ns, context->ipc.gid),
 				 context->ipc.mode);
-		if (osid) {
+		if (secid_valid(&osid)) {
 			char *ctx = NULL;
 			u32 len;
-			if (security_secid_to_secctx(osid, &ctx, &len)) {
-				audit_log_format(ab, " osid=%u", osid);
+			if (security_secid_to_secctx(&osid, &ctx, &len)) {
+				audit_log_format(ab, " osid=%u", osid.secmark);
 				*call_panic = 1;
 			} else {
 				audit_log_format(ab, " obj=%s", ctx);
@@ -1424,7 +1430,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 						  axs->target_auid[i],
 						  axs->target_uid[i],
 						  axs->target_sessionid[i],
-						  axs->target_sid[i],
+						  &axs->target_sid[i],
 						  axs->target_comm[i]))
 				call_panic = 1;
 	}
@@ -1433,7 +1439,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 	    audit_log_pid_context(context, context->target_pid,
 				  context->target_auid, context->target_uid,
 				  context->target_sessionid,
-				  context->target_sid, context->target_comm))
+				  &context->target_sid, context->target_comm))
 			call_panic = 1;
 
 	if (context->pwd.dentry && context->pwd.mnt) {
@@ -1580,7 +1586,7 @@ void __audit_syscall_exit(int success, long return_code)
 	context->aux = NULL;
 	context->aux_pids = NULL;
 	context->target_pid = 0;
-	context->target_sid = 0;
+	secid_init(&context->target_sid);
 	context->sockaddr_len = 0;
 	context->type = 0;
 	context->fds[0] = -1;
diff --git a/kernel/cred.c b/kernel/cred.c
index fa2061ee4955..362de31fcc5b 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -650,7 +650,7 @@ EXPORT_SYMBOL(prepare_kernel_cred);
  * Set the LSM security ID in a set of credentials so that the subjective
  * security is overridden when an alternative set of credentials is used.
  */
-int set_security_override(struct cred *new, u32 secid)
+int set_security_override(struct cred *new, struct secids *secid)
 {
 	return security_kernel_act_as(new, secid);
 }
@@ -668,14 +668,14 @@ EXPORT_SYMBOL(set_security_override);
  */
 int set_security_override_from_ctx(struct cred *new, const char *secctx)
 {
-	u32 secid;
+	struct secids secid;
 	int ret;
 
 	ret = security_secctx_to_secid(secctx, strlen(secctx), &secid);
 	if (ret < 0)
 		return ret;
 
-	return set_security_override(new, secid);
+	return set_security_override(new, &secid);
 }
 EXPORT_SYMBOL(set_security_override_from_ctx);
 
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 5ad2d8ed3a3f..029d51f1157b 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -129,14 +129,16 @@ static void ip_cmsg_recv_checksum(struct msghdr *msg, struct sk_buff *skb,
 static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
 {
 	char *secdata;
-	u32 seclen, secid;
+	u32 seclen;
+	struct secids secid;
 	int err;
 
+	secid_init(&secid);
 	err = security_socket_getpeersec_dgram(NULL, skb, &secid);
 	if (err)
 		return;
 
-	err = security_secid_to_secctx(secid, &secdata, &seclen);
+	err = security_secid_to_secctx(&secid, &secdata, &seclen);
 	if (err)
 		return;
 
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4c1d0c5bc268..379b1651c758 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -312,8 +312,12 @@ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
 	struct nlattr *nest_secctx;
 	int len, ret;
 	char *secctx;
+	struct secids secid;
 
-	ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
+	secid_init(&secid);
+	secid.secmark = ct->secmark;
+
+	ret = security_secid_to_secctx(&secid, &secctx, &len);
 	if (ret)
 		return 0;
 
@@ -592,8 +596,12 @@ static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
 {
 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 	int len, ret;
+	struct secids secid;
+
+	secid_init(&secid);
+	secid.secmark = ct->secmark;
 
-	ret = security_secid_to_secctx(ct->secmark, NULL, &len);
+	ret = security_secid_to_secctx(&secid, NULL, &len);
 	if (ret)
 		return 0;
 
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 037fec54c850..f55f3c02520a 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -181,8 +181,12 @@ static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 	int ret;
 	u32 len;
 	char *secctx;
+	struct secids secid;
 
-	ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
+	secid_init(&secid);
+	secid.secmark = ct->secmark;
+
+	ret = security_secid_to_secctx(&secid, &secctx, &len);
 	if (ret)
 		return;
 
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 74a04638ef03..82d50d78c851 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -289,13 +289,18 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
 {
 	u32 seclen = 0;
 #if IS_ENABLED(CONFIG_NETWORK_SECMARK)
+	struct secids secid;
+
 	if (!skb || !sk_fullsock(skb->sk))
 		return 0;
 
 	read_lock_bh(&skb->sk->sk_callback_lock);
 
-	if (skb->secmark)
-		security_secid_to_secctx(skb->secmark, secdata, &seclen);
+	if (skb->secmark) {
+		secid_init(&secid);
+		secid.secmark = skb->secmark;
+		security_secid_to_secctx(&secid, secdata, &seclen);
+	}
 
 	read_unlock_bh(&skb->sk->sk_callback_lock);
 #endif
diff --git a/net/netfilter/xt_SECMARK.c b/net/netfilter/xt_SECMARK.c
index 4ad5fe27e08b..e67a6dc7ae1d 100644
--- a/net/netfilter/xt_SECMARK.c
+++ b/net/netfilter/xt_SECMARK.c
@@ -52,12 +52,15 @@ secmark_tg(struct sk_buff *skb, const struct xt_action_param *par)
 static int checkentry_lsm(struct xt_secmark_target_info *info)
 {
 	int err;
+	struct secids secid;
 
 	info->secctx[SECMARK_SECCTX_MAX - 1] = '\0';
 	info->secid = 0;
 
 	err = security_secctx_to_secid(info->secctx, strlen(info->secctx),
-				       &info->secid);
+				       &secid);
+	info->secid = secid.secmark;
+
 	if (err) {
 		if (err == -EINVAL)
 			pr_info_ratelimited("invalid security context \'%s\'\n",
@@ -71,7 +74,7 @@ static int checkentry_lsm(struct xt_secmark_target_info *info)
 		return -ENOENT;
 	}
 
-	err = security_secmark_relabel_packet(info->secid);
+	err = security_secmark_relabel_packet(&secid);
 	if (err) {
 		pr_info_ratelimited("unable to obtain relabeling permission\n");
 		return err;
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index 3cdd773c425e..cb8a2c790081 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -244,7 +244,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net,
 
 	return netlbl_unlhsh_add(net,
 				 dev_name, addr, mask, addr_len,
-				 secid->secmark, audit_info);
+				 secid, audit_info);
 }
 
 /**
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 626d756cdee4..9bf98d54b7e9 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -379,7 +379,7 @@ int netlbl_unlhsh_add(struct net *net,
 		      const void *addr,
 		      const void *mask,
 		      u32 addr_len,
-		      u32 secid,
+		      struct secids *secid,
 		      struct netlbl_audit *audit_info)
 {
 	int ret_val;
@@ -389,7 +389,6 @@ int netlbl_unlhsh_add(struct net *net,
 	struct audit_buffer *audit_buf = NULL;
 	char *secctx = NULL;
 	u32 secctx_len;
-	struct secids ids;
 
 	if (addr_len != sizeof(struct in_addr) &&
 	    addr_len != sizeof(struct in6_addr))
@@ -422,8 +421,7 @@ int netlbl_unlhsh_add(struct net *net,
 		const struct in_addr *addr4 = addr;
 		const struct in_addr *mask4 = mask;
 
-		ids.secmark = secid;
-		ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, &ids);
+		ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, secid);
 		if (audit_buf != NULL)
 			netlbl_af4list_audit_addr(audit_buf, 1,
 						  dev_name,
@@ -436,8 +434,7 @@ int netlbl_unlhsh_add(struct net *net,
 		const struct in6_addr *addr6 = addr;
 		const struct in6_addr *mask6 = mask;
 
-		ids.secmark = secid;
-		ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, &ids);
+		ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, secid);
 		if (audit_buf != NULL)
 			netlbl_af6list_audit_addr(audit_buf, 1,
 						  dev_name,
@@ -511,7 +508,7 @@ static int netlbl_unlhsh_remove_addr4(struct net *net,
 		if (dev != NULL)
 			dev_put(dev);
 		if (entry != NULL &&
-		    security_secid_to_secctx(entry->secid.secmark,
+		    security_secid_to_secctx(&entry->secid,
 					     &secctx, &secctx_len) == 0) {
 			audit_log_format(audit_buf, " sec_obj=%s", secctx);
 			security_release_secctx(secctx, secctx_len);
@@ -572,7 +569,7 @@ static int netlbl_unlhsh_remove_addr6(struct net *net,
 		if (dev != NULL)
 			dev_put(dev);
 		if (entry != NULL &&
-		    security_secid_to_secctx(entry->secid.secmark,
+		    security_secid_to_secctx(&entry->secid,
 					     &secctx, &secctx_len) == 0) {
 			audit_log_format(audit_buf, " sec_obj=%s", secctx);
 			security_release_secctx(secctx, secctx_len);
@@ -897,7 +894,7 @@ static int netlbl_unlabel_staticadd(struct sk_buff *skb,
 	void *addr;
 	void *mask;
 	u32 addr_len;
-	u32 secid;
+	struct secids secid;
 	struct netlbl_audit audit_info;
 
 	/* Don't allow users to add both IPv4 and IPv6 addresses for a
@@ -926,7 +923,7 @@ static int netlbl_unlabel_staticadd(struct sk_buff *skb,
 		return ret_val;
 
 	return netlbl_unlhsh_add(&init_net,
-				 dev_name, addr, mask, addr_len, secid,
+				 dev_name, addr, mask, addr_len, &secid,
 				 &audit_info);
 }
 
@@ -948,7 +945,7 @@ static int netlbl_unlabel_staticadddef(struct sk_buff *skb,
 	void *addr;
 	void *mask;
 	u32 addr_len;
-	u32 secid;
+	struct secids secid;
 	struct netlbl_audit audit_info;
 
 	/* Don't allow users to add both IPv4 and IPv6 addresses for a
@@ -975,7 +972,7 @@ static int netlbl_unlabel_staticadddef(struct sk_buff *skb,
 		return ret_val;
 
 	return netlbl_unlhsh_add(&init_net,
-				 NULL, addr, mask, addr_len, secid,
+				 NULL, addr, mask, addr_len, &secid,
 				 &audit_info);
 }
 
@@ -1087,7 +1084,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd,
 	struct netlbl_unlhsh_walk_arg *cb_arg = arg;
 	struct net_device *dev;
 	void *data;
-	u32 secid;
+	struct secids secid;
 	char *secctx;
 	u32 secctx_len;
 
@@ -1127,7 +1124,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd,
 		if (ret_val != 0)
 			goto list_cb_failure;
 
-		secid = addr4->secid.secmark;
+		secid = addr4->secid;
 	} else {
 		ret_val = nla_put_in6_addr(cb_arg->skb,
 					   NLBL_UNLABEL_A_IPV6ADDR,
@@ -1141,10 +1138,10 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd,
 		if (ret_val != 0)
 			goto list_cb_failure;
 
-		secid = addr6->secid.secmark;
+		secid = addr6->secid;
 	}
 
-	ret_val = security_secid_to_secctx(secid, &secctx, &secctx_len);
+	ret_val = security_secid_to_secctx(&secid, &secctx, &secctx_len);
 	if (ret_val != 0)
 		goto list_cb_failure;
 	ret_val = nla_put(cb_arg->skb,
@@ -1546,7 +1543,7 @@ int __init netlbl_unlabel_defconf(void)
 	/* Only the kernel is allowed to call this function and the only time
 	 * it is called is at bootup before the audit subsystem is reporting
 	 * messages so don't worry to much about these values. */
-	security_task_getsecid(current, &audit_info.secid.secmark);
+	security_task_getsecid(current, &audit_info.secid);
 	audit_info.loginuid = GLOBAL_ROOT_UID;
 	audit_info.sessionid = 0;
 
diff --git a/net/netlabel/netlabel_unlabeled.h b/net/netlabel/netlabel_unlabeled.h
index 3a9e5dc9511b..2c68e9f9de13 100644
--- a/net/netlabel/netlabel_unlabeled.h
+++ b/net/netlabel/netlabel_unlabeled.h
@@ -225,7 +225,7 @@ int netlbl_unlhsh_add(struct net *net,
 		      const void *addr,
 		      const void *mask,
 		      u32 addr_len,
-		      u32 secid,
+		      struct secids *secid,
 		      struct netlbl_audit *audit_info);
 int netlbl_unlhsh_remove(struct net *net,
 			 const char *dev_name,
diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c
index cb992f1cca2e..740db88d14f2 100644
--- a/net/netlabel/netlabel_user.c
+++ b/net/netlabel/netlabel_user.c
@@ -113,7 +113,7 @@ struct audit_buffer *netlbl_audit_start_common(int type,
 			 audit_info->sessionid);
 
 	if (audit_info->secid.secmark != 0 &&
-	    security_secid_to_secctx(audit_info->secid.secmark,
+	    security_secid_to_secctx(&audit_info->secid,
 				     &secctx,
 				     &secctx_len) == 0) {
 		audit_log_format(audit_buf, " subj=%s", secctx);
diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h
index 1c320ccde24c..4a397cde1a48 100644
--- a/net/netlabel/netlabel_user.h
+++ b/net/netlabel/netlabel_user.h
@@ -48,7 +48,7 @@
 static inline void netlbl_netlink_auditinfo(struct sk_buff *skb,
 					    struct netlbl_audit *audit_info)
 {
-	security_task_getsecid(current, &audit_info->secid.secmark);
+	security_task_getsecid(current, &audit_info->secid);
 	audit_info->loginuid = audit_get_loginuid(current);
 	audit_info->sessionid = audit_get_sessionid(current);
 }
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 68bb70a62afe..f0f17fc33157 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -141,17 +141,17 @@ static struct hlist_head *unix_sockets_unbound(void *addr)
 #ifdef CONFIG_SECURITY_NETWORK
 static void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-	UNIXCB(skb).secid = scm->secid;
+	UNIXCB(skb).secid = scm->secid.secmark;
 }
 
 static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
 {
-	scm->secid = UNIXCB(skb).secid;
+	scm->secid.secmark = UNIXCB(skb).secid;
 }
 
 static inline bool unix_secdata_eq(struct scm_cookie *scm, struct sk_buff *skb)
 {
-	return (scm->secid == UNIXCB(skb).secid);
+	return (scm->secid.secmark == UNIXCB(skb).secid);
 }
 #else
 static inline void unix_get_secdata(struct scm_cookie *scm, struct sk_buff *skb)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 46d332ed833a..9230d8046fd7 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1070,7 +1070,7 @@ static int xfrm_policy_match(const struct xfrm_policy *pol,
 	match = xfrm_selector_match(sel, fl, family);
 	if (match)
 		ret = security_xfrm_policy_lookup(pol->security,
-						  fl->flowi_secid.secmark,
+						  &fl->flowi_secid,
 						  dir);
 
 	return ret;
@@ -1183,7 +1183,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
 				goto out;
 			}
 			err = security_xfrm_policy_lookup(pol->security,
-						      fl->flowi_secid.secmark,
+						      &fl->flowi_secid,
 						      dir);
 			if (!err) {
 				if (!xfrm_pol_hold_rcu(pol))
@@ -2367,7 +2367,7 @@ int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
 		return -EAFNOSUPPORT;
 
 	afinfo->decode_session(skb, fl, reverse);
-	err = security_xfrm_decode_session(skb, &fl->flowi_secid.secmark);
+	err = security_xfrm_decode_session(skb, &fl->flowi_secid);
 	rcu_read_unlock();
 	return err;
 }
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index a17f7b02ac32..838a2638c8d4 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1010,7 +1010,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
 		xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
 		memcpy(&x->mark, &pol->mark, sizeof(x->mark));
 
-		error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid.secmark);
+		error = security_xfrm_state_alloc_acquire(x, pol->security, &fl->flowi_secid);
 		if (error) {
 			x->km.state = XFRM_STATE_DEAD;
 			to_put = x;
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 35fe91aa1fc9..1b07d2e52efb 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -192,8 +192,9 @@ enum ima_hooks {
 };
 
 /* LIM API function definitions */
-int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid,
-		   int mask, enum ima_hooks func, int *pcr);
+int ima_get_action(struct inode *inode, const struct cred *cred,
+		   struct secids *secid, int mask, enum ima_hooks func,
+		   int *pcr);
 int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func);
 int ima_collect_measurement(struct integrity_iint_cache *iint,
 			    struct file *file, void *buf, loff_t size,
@@ -213,8 +214,9 @@ void ima_free_template_entry(struct ima_template_entry *entry);
 const char *ima_d_path(const struct path *path, char **pathbuf, char *filename);
 
 /* IMA policy related functions */
-int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid,
-		     enum ima_hooks func, int mask, int flags, int *pcr);
+int ima_match_policy(struct inode *inode, const struct cred *cred,
+		     struct secids *secid, enum ima_hooks func, int mask,
+		     int flags, int *pcr);
 void ima_init_policy(void);
 void ima_update_policy(void);
 void ima_update_policy_flag(void);
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index bf88236b7a0b..53a3b7c8ae7d 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -175,8 +175,9 @@ void ima_add_violation(struct file *file, const unsigned char *filename,
  * Returns IMA_MEASURE, IMA_APPRAISE mask.
  *
  */
-int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid,
-		   int mask, enum ima_hooks func, int *pcr)
+int ima_get_action(struct inode *inode, const struct cred *cred,
+		   struct secids *secid, int mask, enum ima_hooks func,
+		   int *pcr)
 {
 	int flags = IMA_MEASURE | IMA_AUDIT | IMA_APPRAISE | IMA_HASH;
 
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 8bd7a0733e51..2afe49caad38 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -50,13 +50,13 @@ bool is_ima_appraise_enabled(void)
  */
 int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func)
 {
-	u32 secid;
+	struct secids secid;
 
 	if (!ima_appraise)
 		return 0;
 
 	security_task_getsecid(current, &secid);
-	return ima_match_policy(inode, current_cred(), secid, func, mask,
+	return ima_match_policy(inode, current_cred(), &secid, func, mask,
 				IMA_APPRAISE | IMA_HASH, NULL);
 }
 
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 74d0bd7e76d7..38b28ddc3a43 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -172,8 +172,8 @@ void ima_file_free(struct file *file)
 }
 
 static int process_measurement(struct file *file, const struct cred *cred,
-			       u32 secid, char *buf, loff_t size, int mask,
-			       enum ima_hooks func, int opened)
+			       struct secids *secid, char *buf, loff_t size,
+			       int mask, enum ima_hooks func, int opened)
 {
 	struct inode *inode = file_inode(file);
 	struct integrity_iint_cache *iint = NULL;
@@ -338,11 +338,11 @@ static int process_measurement(struct file *file, const struct cred *cred,
  */
 int ima_file_mmap(struct file *file, unsigned long prot)
 {
-	u32 secid;
+	struct secids secid;
 
 	if (file && (prot & PROT_EXEC)) {
 		security_task_getsecid(current, &secid);
-		return process_measurement(file, current_cred(), secid, NULL,
+		return process_measurement(file, current_cred(), &secid, NULL,
 					   0, MAY_EXEC, MMAP_CHECK, 0);
 	}
 
@@ -365,16 +365,16 @@ int ima_file_mmap(struct file *file, unsigned long prot)
 int ima_bprm_check(struct linux_binprm *bprm)
 {
 	int ret;
-	u32 secid;
+	struct secids secid;
 
 	security_task_getsecid(current, &secid);
-	ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0,
+	ret = process_measurement(bprm->file, current_cred(), &secid, NULL, 0,
 				  MAY_EXEC, BPRM_CHECK, 0);
 	if (ret)
 		return ret;
 
 	security_cred_getsecid(bprm->cred, &secid);
-	return process_measurement(bprm->file, bprm->cred, secid, NULL, 0,
+	return process_measurement(bprm->file, bprm->cred, &secid, NULL, 0,
 				   MAY_EXEC, CREDS_CHECK, 0);
 }
 
@@ -390,10 +390,10 @@ int ima_bprm_check(struct linux_binprm *bprm)
  */
 int ima_file_check(struct file *file, int mask, int opened)
 {
-	u32 secid;
+	struct secids secid;
 
 	security_task_getsecid(current, &secid);
-	return process_measurement(file, current_cred(), secid, NULL, 0,
+	return process_measurement(file, current_cred(), &secid, NULL, 0,
 				   mask & (MAY_READ | MAY_WRITE | MAY_EXEC |
 					   MAY_APPEND), FILE_CHECK, opened);
 }
@@ -472,7 +472,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size,
 		       enum kernel_read_file_id read_id)
 {
 	enum ima_hooks func;
-	u32 secid;
+	struct secids secid;
 
 	if (!file && read_id == READING_FIRMWARE) {
 		if ((ima_appraise & IMA_APPRAISE_FIRMWARE) &&
@@ -496,7 +496,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size,
 
 	func = read_idmap[read_id] ?: FILE_CHECK;
 	security_task_getsecid(current, &secid);
-	return process_measurement(file, current_cred(), secid, buf, size,
+	return process_measurement(file, current_cred(), &secid, buf, size,
 				   MAY_READ, func, 0);
 }
 
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index d89bebf85421..e38527b30047 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -256,7 +256,7 @@ static void ima_lsm_update_rules(void)
  * Returns true on rule match, false on failure.
  */
 static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
-			    const struct cred *cred, u32 secid,
+			    const struct cred *cred, struct secids *secid,
 			    enum ima_hooks func, int mask)
 {
 	int i;
@@ -293,7 +293,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
 		return false;
 	for (i = 0; i < MAX_LSM_RULES; i++) {
 		int rc = 0;
-		u32 osid;
+		struct secids osid;
 		int retried = 0;
 
 		if (!rule->lsm[i].rule)
@@ -304,7 +304,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
 		case LSM_OBJ_ROLE:
 		case LSM_OBJ_TYPE:
 			security_inode_getsecid(inode, &osid);
-			rc = security_filter_rule_match(osid,
+			rc = security_filter_rule_match(&osid,
 							rule->lsm[i].type,
 							Audit_equal,
 							rule->lsm[i].rule,
@@ -374,8 +374,9 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func)
  * list when walking it.  Reads are many orders of magnitude more numerous
  * than writes so ima_match_policy() is classical RCU candidate.
  */
-int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid,
-		     enum ima_hooks func, int mask, int flags, int *pcr)
+int ima_match_policy(struct inode *inode, const struct cred *cred,
+		     struct secids *secid, enum ima_hooks func, int mask,
+		     int flags, int *pcr)
 {
 	struct ima_rule_entry *entry;
 	int action = 0, actmask = flags | (flags << 1);
diff --git a/security/security.c b/security/security.c
index 61ffb0c04e8e..cbe1a497ec5a 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1248,12 +1248,10 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer
 }
 EXPORT_SYMBOL(security_inode_listsecurity);
 
-void security_inode_getsecid(struct inode *inode, u32 *secid)
+void security_inode_getsecid(struct inode *inode, struct secids *secid)
 {
-	struct secids ids;
-
-	call_void_hook(inode_getsecid, inode, &ids);
-	*secid = ids.secmark;
+	secid_init(secid);
+	call_void_hook(inode_getsecid, inode, secid);
 }
 
 int security_inode_copy_up(struct dentry *src, struct cred **new)
@@ -1461,22 +1459,16 @@ void security_transfer_creds(struct cred *new, const struct cred *old)
 	call_void_hook(cred_transfer, new, old);
 }
 
-void security_cred_getsecid(const struct cred *c, u32 *secid)
+void security_cred_getsecid(const struct cred *c, struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = 0;
-	call_void_hook(cred_getsecid, c, &ids);
-	*secid = ids.secmark;
+	secid_init(secid);
+	call_void_hook(cred_getsecid, c, secid);
 }
 EXPORT_SYMBOL(security_cred_getsecid);
 
-int security_kernel_act_as(struct cred *new, u32 secid)
+int security_kernel_act_as(struct cred *new, struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = secid;
-	return call_int_hook(kernel_act_as, 0, new, &ids);
+	return call_int_hook(kernel_act_as, 0, new, secid);
 }
 
 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
@@ -1533,13 +1525,10 @@ int security_task_getsid(struct task_struct *p)
 	return call_int_hook(task_getsid, 0, p);
 }
 
-void security_task_getsecid(struct task_struct *p, u32 *secid)
+void security_task_getsecid(struct task_struct *p, struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = 0;
-	call_void_hook(task_getsecid, p, &ids);
-	*secid = ids.secmark;
+	secid_init(secid);
+	call_void_hook(task_getsecid, p, secid);
 }
 EXPORT_SYMBOL(security_task_getsecid);
 
@@ -1619,13 +1608,10 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
 	return call_int_hook(ipc_permission, 0, ipcp, flag);
 }
 
-void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = 0;
-	call_void_hook(ipc_getsecid, ipcp, &ids);
-	*secid = ids.secmark;
+	secid_init(secid);
+	call_void_hook(ipc_getsecid, ipcp, secid);
 }
 
 int security_msg_msg_alloc(struct msg_msg *msg)
@@ -1802,26 +1788,18 @@ int security_ismaclabel(const char *name)
 }
 EXPORT_SYMBOL(security_ismaclabel);
 
-int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
+int security_secid_to_secctx(struct secids *secid, char **secdata, u32 *seclen)
 {
-	struct secids ids;
-
-	ids.secmark = secid;
-	return call_int_hook(secid_to_secctx, -EOPNOTSUPP, &ids, secdata,
+	return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
 				seclen);
 }
 EXPORT_SYMBOL(security_secid_to_secctx);
 
-int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
+int security_secctx_to_secid(const char *secdata, u32 seclen,
+			     struct secids *secid)
 {
-	struct secids ids;
-	int rc;
-
-	ids.secmark = 0;
-	rc = call_int_hook(secctx_to_secid, 0, secdata, seclen, &ids);
-	*secid = ids.secmark;
-
-	return rc;
+	secid_init(secid);
+	return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
 }
 EXPORT_SYMBOL(security_secctx_to_secid);
 
@@ -1950,16 +1928,11 @@ int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
 				optval, optlen, len);
 }
 
-int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
+int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb,
+				     struct secids *secid)
 {
-	struct secids ids;
-	int rc;
-
-	rc = call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
-			     skb, &ids);
-	*secid = ids.secmark;
-
-	return rc;
+	return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
+			     skb, secid);
 }
 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
 
@@ -2026,12 +1999,9 @@ void security_inet_conn_established(struct sock *sk,
 }
 EXPORT_SYMBOL(security_inet_conn_established);
 
-int security_secmark_relabel_packet(u32 secid)
+int security_secmark_relabel_packet(struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = secid;
-	return call_int_hook(secmark_relabel_packet, 0, &ids);
+	return call_int_hook(secmark_relabel_packet, 0, secid);
 }
 EXPORT_SYMBOL(security_secmark_relabel_packet);
 
@@ -2168,12 +2138,10 @@ int security_xfrm_state_alloc(struct xfrm_state *x,
 EXPORT_SYMBOL(security_xfrm_state_alloc);
 
 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
-				      struct xfrm_sec_ctx *polsec, u32 secid)
+				      struct xfrm_sec_ctx *polsec,
+				      const struct secids *secid)
 {
-	struct secids ids;
-
-	ids.secmark = secid;
-	return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, &ids);
+	return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
 }
 
 int security_xfrm_state_delete(struct xfrm_state *x)
@@ -2187,12 +2155,10 @@ void security_xfrm_state_free(struct xfrm_state *x)
 	call_void_hook(xfrm_state_free_security, x);
 }
 
-int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
+int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
+					struct secids *fl_secid, u8 dir)
 {
-	struct secids ids;
-
-	ids.secmark = fl_secid;
-	return call_int_hook(xfrm_policy_lookup, 0, ctx, &ids, dir);
+	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
 }
 
 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
@@ -2219,22 +2185,19 @@ int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
 	return rc;
 }
 
-int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
+int security_xfrm_decode_session(struct sk_buff *skb, struct secids *secid)
 {
-	struct secids ids;
-	int rc;
-
-	rc = call_int_hook(xfrm_decode_session, 0, skb, &ids, 1);
-	*secid = ids.secmark;
-
-	return rc;
+	secid_init(secid);
+	return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
 }
 
 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
 {
-	int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
-				0);
 
+	int rc;
+
+	secid_init(&fl->flowi_secid);
+	rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 0);
 	BUG_ON(rc);
 }
 EXPORT_SYMBOL(security_skb_classify_flow);
@@ -2294,13 +2257,10 @@ void security_audit_rule_free(void *lsmrule)
 	call_void_hook(audit_rule_free, lsmrule);
 }
 
-int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
-			      struct audit_context *actx)
+int security_audit_rule_match(struct secids *secid, u32 field, u32 op,
+			      void *lsmrule, struct audit_context *actx)
 {
-	struct secids ids;
-
-	ids.secmark = secid;
-	return call_int_hook(audit_rule_match, 0, &ids, field, op, lsmrule,
+	return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
 				actx);
 }
 #endif /* CONFIG_AUDIT */
-- 
2.14.3