1 files changed, 7 insertions, 14 deletions

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 0692ab5a0d67..f6d8b8cb5e34 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -25,16 +25,6 @@
 
 
 /*
- * Initialize a new task whose father had been ptraced.
- *
- * Called from copy_process().
- */
-void ptrace_fork(struct task_struct *child, unsigned long clone_flags)
-{
-        arch_ptrace_fork(child, clone_flags);
-}
-
-/*
  * ptrace a task: make the debugger its new parent and
  * move it to the ptrace list.
  *
@@ -185,10 +175,11 @@ int ptrace_attach(struct task_struct *task)
         if (same_thread_group(task, current))
                 goto out;
 
-        /* Protect exec's credential calculations against our interference;
-         * SUID, SGID and LSM creds get determined differently under ptrace.
+        /* Protect the target's credential calculations against our
+         * interference; SUID, SGID and LSM creds get determined differently
+         * under ptrace.
          */
-        retval = mutex_lock_interruptible(&task->cred_exec_mutex);
+        retval = mutex_lock_interruptible(&task->cred_guard_mutex);
         if (retval  < 0)
                 goto out;
 
@@ -232,7 +223,7 @@ repeat:
 bad:
         write_unlock_irqrestore(&tasklist_lock, flags);
         task_unlock(task);
-        mutex_unlock(&task->cred_exec_mutex);
+        mutex_unlock(&task->cred_guard_mutex);
 out:
         return retval;
 }
@@ -304,6 +295,8 @@ int ptrace_detach(struct task_struct *child, unsigned int data)
         if (child->ptrace) {
                 child->exit_code = data;
                 dead = __ptrace_detach(current, child);
+                if (!child->exit_state)
+                        wake_up_process(child);
         }
         write_unlock_irq(&tasklist_lock);