selinux: Use current_security() when possible

There were a number of places using the following code pattern:

  struct cred *cred = current_cred();
  struct task_security_struct *tsec = cred->security;

... which were simplified to the following:

  struct task_security_struct *tsec = current_security();

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index e950040..0f524b7 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -188,7 +188,7 @@ static inline u32 task_sid(const struct task_struct *task)
  */
 static inline u32 current_sid(void)
 {
-       const struct task_security_struct *tsec = current_cred()->security;
+       const struct task_security_struct *tsec = current_security();
 
        return tsec->sid;
 }
@@ -1558,8 +1558,7 @@ static int may_create(struct inode *dir,
                      struct dentry *dentry,
                      u16 tclass)
 {
-       const struct cred *cred = current_cred();
-       const struct task_security_struct *tsec = cred->security;
+       const struct task_security_struct *tsec = current_security();
        struct inode_security_struct *dsec;
        struct superblock_security_struct *sbsec;
        u32 sid, newsid;
@@ -2157,8 +2156,7 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 
 static int selinux_bprm_secureexec(struct linux_binprm *bprm)
 {
-       const struct cred *cred = current_cred();
-       const struct task_security_struct *tsec = cred->security;
+       const struct task_security_struct *tsec = current_security();
        u32 sid, osid;
        int atsecure = 0;
 
@@ -2533,8 +2531,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
                                       char **name, void **value,
                                       size_t *len)
 {
-       const struct cred *cred = current_cred();
-       const struct task_security_struct *tsec = cred->security;
+       const struct task_security_struct *tsec = current_security();
        struct inode_security_struct *dsec;
        struct superblock_security_struct *sbsec;
        u32 sid, newsid, clen;
@@ -3669,8 +3666,7 @@ static int sock_has_perm(struct task_struct *task, struct sock *sk, u32 perms)
 static int selinux_socket_create(int family, int type,
                                 int protocol, int kern)
 {
-       const struct cred *cred = current_cred();
-       const struct task_security_struct *tsec = cred->security;
+       const struct task_security_struct *tsec = current_security();
        u32 newsid;
        u16 secclass;
 
@@ -3685,8 +3681,7 @@ static int selinux_socket_create(int family, int type,
 static int selinux_socket_post_create(struct socket *sock, int family,
                                      int type, int protocol, int kern)
 {
-       const struct cred *cred = current_cred();
-       const struct task_security_struct *tsec = cred->security;
+       const struct task_security_struct *tsec = current_security();
        struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
        struct sk_security_struct *sksec;
        int err = 0;