msg/security: Pass kern_ipc_perm not msg_queue into the msg_queue security hooks

All of the implementations of security hooks that take msg_queue only
access q_perm the struct kern_ipc_perm member.  This means the
dependencies of the msg_queue security hooks can be simplified by
passing the kern_ipc_perm member of msg_queue.

Making this change will allow struct msg_queue to become private to
ipc/msg.c.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

3 files changed, 36 insertions, 36 deletions

diff --git a/security/security.c b/security/security.c
index 77b69bd6f234..02d734e69955 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1163,33 +1163,33 @@ void security_msg_msg_free(struct msg_msg *msg)
 	call_void_hook(msg_msg_free_security, msg);
 }
 
-int security_msg_queue_alloc(struct msg_queue *msq)
+int security_msg_queue_alloc(struct kern_ipc_perm *msq)
 {
 	return call_int_hook(msg_queue_alloc_security, 0, msq);
 }
 
-void security_msg_queue_free(struct msg_queue *msq)
+void security_msg_queue_free(struct kern_ipc_perm *msq)
 {
 	call_void_hook(msg_queue_free_security, msq);
 }
 
-int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
+int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
 {
 	return call_int_hook(msg_queue_associate, 0, msq, msqflg);
 }
 
-int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
+int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
 {
 	return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
 }
 
-int security_msg_queue_msgsnd(struct msg_queue *msq,
+int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
 			       struct msg_msg *msg, int msqflg)
 {
 	return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
 }
 
-int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
+int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
 			       struct task_struct *target, long type, int mode)
 {
 	return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 14f9e6c08273..925e546b5a87 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -5532,52 +5532,52 @@ static void selinux_msg_msg_free_security(struct msg_msg *msg)
 }
 
 /* message queue security operations */
-static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
+static int selinux_msg_queue_alloc_security(struct kern_ipc_perm *msq)
 {
 	struct ipc_security_struct *isec;
 	struct common_audit_data ad;
 	u32 sid = current_sid();
 	int rc;
 
-	rc = ipc_alloc_security(&msq->q_perm, SECCLASS_MSGQ);
+	rc = ipc_alloc_security(msq, SECCLASS_MSGQ);
 	if (rc)
 		return rc;
 
-	isec = msq->q_perm.security;
+	isec = msq->security;
 
 	ad.type = LSM_AUDIT_DATA_IPC;
-	ad.u.ipc_id = msq->q_perm.key;
+	ad.u.ipc_id = msq->key;
 
 	rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
 			  MSGQ__CREATE, &ad);
 	if (rc) {
-		ipc_free_security(&msq->q_perm);
+		ipc_free_security(msq);
 		return rc;
 	}
 	return 0;
 }
 
-static void selinux_msg_queue_free_security(struct msg_queue *msq)
+static void selinux_msg_queue_free_security(struct kern_ipc_perm *msq)
 {
-	ipc_free_security(&msq->q_perm);
+	ipc_free_security(msq);
 }
 
-static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
+static int selinux_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
 {
 	struct ipc_security_struct *isec;
 	struct common_audit_data ad;
 	u32 sid = current_sid();
 
-	isec = msq->q_perm.security;
+	isec = msq->security;
 
 	ad.type = LSM_AUDIT_DATA_IPC;
-	ad.u.ipc_id = msq->q_perm.key;
+	ad.u.ipc_id = msq->key;
 
 	return avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
 			    MSGQ__ASSOCIATE, &ad);
 }
 
-static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
+static int selinux_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
 {
 	int err;
 	int perms;
@@ -5602,11 +5602,11 @@ static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
 		return 0;
 	}
 
-	err = ipc_has_perm(&msq->q_perm, perms);
+	err = ipc_has_perm(msq, perms);
 	return err;
 }
 
-static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg)
+static int selinux_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg, int msqflg)
 {
 	struct ipc_security_struct *isec;
 	struct msg_security_struct *msec;
@@ -5614,7 +5614,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
 	u32 sid = current_sid();
 	int rc;
 
-	isec = msq->q_perm.security;
+	isec = msq->security;
 	msec = msg->security;
 
 	/*
@@ -5632,7 +5632,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
 	}
 
 	ad.type = LSM_AUDIT_DATA_IPC;
-	ad.u.ipc_id = msq->q_perm.key;
+	ad.u.ipc_id = msq->key;
 
 	/* Can this process write to the queue? */
 	rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
@@ -5649,7 +5649,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
 	return rc;
 }
 
-static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
+static int selinux_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
 				    struct task_struct *target,
 				    long type, int mode)
 {
@@ -5659,11 +5659,11 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 	u32 sid = task_sid(target);
 	int rc;
 
-	isec = msq->q_perm.security;
+	isec = msq->security;
 	msec = msg->security;
 
 	ad.type = LSM_AUDIT_DATA_IPC;
-	ad.u.ipc_id = msq->q_perm.key;
+	ad.u.ipc_id = msq->key;
 
 	rc = avc_has_perm(sid, isec->sid,
 			  SECCLASS_MSGQ, MSGQ__READ, &ad);
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a3398c7f32c9..d960c2ea8d79 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3210,9 +3210,9 @@ static int smack_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
  *
  * Returns 0
  */
-static int smack_msg_queue_alloc_security(struct msg_queue *msq)
+static int smack_msg_queue_alloc_security(struct kern_ipc_perm *msq)
 {
-	struct kern_ipc_perm *kisp = &msq->q_perm;
+	struct kern_ipc_perm *kisp = msq;
 	struct smack_known *skp = smk_of_current();
 
 	kisp->security = skp;
@@ -3225,9 +3225,9 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
  *
  * Clears the blob pointer
  */
-static void smack_msg_queue_free_security(struct msg_queue *msq)
+static void smack_msg_queue_free_security(struct kern_ipc_perm *msq)
 {
-	struct kern_ipc_perm *kisp = &msq->q_perm;
+	struct kern_ipc_perm *kisp = msq;
 
 	kisp->security = NULL;
 }
@@ -3238,9 +3238,9 @@ static void smack_msg_queue_free_security(struct msg_queue *msq)
  *
  * Returns a pointer to the smack label entry
  */
-static struct smack_known *smack_of_msq(struct msg_queue *msq)
+static struct smack_known *smack_of_msq(struct kern_ipc_perm *msq)
 {
-	return (struct smack_known *)msq->q_perm.security;
+	return (struct smack_known *)msq->security;
 }
 
 /**
@@ -3250,7 +3250,7 @@ static struct smack_known *smack_of_msq(struct msg_queue *msq)
  *
  * return 0 if current has access, error otherwise
  */
-static int smk_curacc_msq(struct msg_queue *msq, int access)
+static int smk_curacc_msq(struct kern_ipc_perm *msq, int access)
 {
 	struct smack_known *msp = smack_of_msq(msq);
 	struct smk_audit_info ad;
@@ -3258,7 +3258,7 @@ static int smk_curacc_msq(struct msg_queue *msq, int access)
 
 #ifdef CONFIG_AUDIT
 	smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
-	ad.a.u.ipc_id = msq->q_perm.id;
+	ad.a.u.ipc_id = msq->id;
 #endif
 	rc = smk_curacc(msp, access, &ad);
 	rc = smk_bu_current("msq", msp, access, rc);
@@ -3272,7 +3272,7 @@ static int smk_curacc_msq(struct msg_queue *msq, int access)
  *
  * Returns 0 if current has the requested access, error code otherwise
  */
-static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
+static int smack_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
 {
 	int may;
 
@@ -3287,7 +3287,7 @@ static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
  *
  * Returns 0 if current has the requested access, error code otherwise
  */
-static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
+static int smack_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
 {
 	int may;
 
@@ -3321,7 +3321,7 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
  *
  * Returns 0 if current has the requested access, error code otherwise
  */
-static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
+static int smack_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg,
 				  int msqflg)
 {
 	int may;
@@ -3340,7 +3340,7 @@ static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
  *
  * Returns 0 if current has read and write access, error code otherwise
  */
-static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
+static int smack_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
 			struct task_struct *target, long type, int mode)
 {
 	return smk_curacc_msq(msq, MAY_READWRITE);