4 files changed, 5 insertions, 4 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 16a982e389fb..0839a2c9b952 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2075,7 +2075,7 @@ static inline unsigned long wait_task_inactive(struct task_struct *p,
 #define for_each_process(p) \
         for (p = &init_task ; (p = next_task(p)) != &init_task ; )
 
-extern bool is_single_threaded(struct task_struct *);
+extern bool current_is_single_threaded(void);
 
 /*
  * Careful: do_each_thread/while_each_thread is a double loop so
diff --git a/lib/is_single_threaded.c b/lib/is_single_threaded.c
index 2762516e0a5e..434010980bdf 100644
--- a/lib/is_single_threaded.c
+++ b/lib/is_single_threaded.c
@@ -15,8 +15,9 @@
 /*
  * Returns true if the task does not share ->mm with another thread/process.
  */
-bool is_single_threaded(struct task_struct *task)
+bool current_is_single_threaded(void)
 {
+        struct task_struct *task = current;
         struct mm_struct *mm = task->mm;
         struct task_struct *p, *t;
         bool ret;
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 276d27882ce8..ed929af466d3 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -702,7 +702,7 @@ long join_session_keyring(const char *name)
         /* only permit this if there's a single thread in the thread group -
          * this avoids us having to adjust the creds on all threads and risking
          * ENOMEM */
-        if (!is_single_threaded(current))
+        if (!current_is_single_threaded())
                 return -EMLINK;
 
         new = prepare_creds();
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 2081055f6783..e65677da36bd 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -5187,7 +5187,7 @@ static int selinux_setprocattr(struct task_struct *p,
 
                 /* Only allow single threaded processes to change context */
                 error = -EPERM;
-                if (!is_single_threaded(p)) {
+                if (!current_is_single_threaded()) {
                         error = security_bounded_transition(tsec->sid, sid);
                         if (error)
                                 goto abort_change;