1 files changed, 9 insertions, 8 deletions

diff --git a/include/linux/cred.h b/include/linux/cred.h
index f240f2fa0197..40308969ed00 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -16,7 +16,7 @@
 #include <linux/init.h>
 #include <linux/key.h>
 #include <linux/selinux.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 struct user_struct;
 struct cred;
@@ -265,10 +265,11 @@ static inline void put_cred(const struct cred *_cred)
 /**
  * current_cred - Access the current task's subjective credentials
  *
- * Access the subjective credentials of the current task.
+ * Access the subjective credentials of the current task.  RCU-safe,
+ * since nobody else can modify it.
  */
 #define current_cred() \
-        (current->cred)
+        rcu_dereference_protected(current->cred, 1)
 
 /**
  * __task_cred - Access a task's objective credentials
@@ -306,8 +307,8 @@ static inline void put_cred(const struct cred *_cred)
 #define get_current_user()                              \
 ({                                                      \
         struct user_struct *__u;                        \
-        struct cred *__cred;                            \
-        __cred = (struct cred *) current_cred();        \
+        const struct cred *__cred;                      \
+        __cred = current_cred();                        \
         __u = get_uid(__cred->user);                    \
         __u;                                            \
 })
@@ -321,8 +322,8 @@ static inline void put_cred(const struct cred *_cred)
 #define get_current_groups()                            \
 ({                                                      \
         struct group_info *__groups;                    \
-        struct cred *__cred;                            \
-        __cred = (struct cred *) current_cred();        \
+        const struct cred *__cred;                      \
+        __cred = current_cred();                        \
         __groups = get_group_info(__cred->group_info);  \
         __groups;                                       \
 })
@@ -341,7 +342,7 @@ static inline void put_cred(const struct cred *_cred)
 
 #define current_cred_xxx(xxx)                   \
 ({                                              \
-        current->cred->xxx;                     \
+        current_cred()->xxx;                    \
 })
 
 #define current_uid()           (current_cred_xxx(uid))