Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit

[cascardo/linux.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index aaf7823..36c0daa 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -798,6 +798,29 @@ struct file *get_mm_exe_file(struct mm_struct *mm)
 }
 EXPORT_SYMBOL(get_mm_exe_file);
 
+/**
+ * get_task_exe_file - acquire a reference to the task's executable file
+ *
+ * Returns %NULL if task's mm (if any) has no associated executable file or
+ * this is a kernel thread with borrowed mm (see the comment above get_task_mm).
+ * User must release file via fput().
+ */
+struct file *get_task_exe_file(struct task_struct *task)
+{
+       struct file *exe_file = NULL;
+       struct mm_struct *mm;
+
+       task_lock(task);
+       mm = task->mm;
+       if (mm) {
+               if (!(task->flags & PF_KTHREAD))
+                       exe_file = get_mm_exe_file(mm);
+       }
+       task_unlock(task);
+       return exe_file;
+}
+EXPORT_SYMBOL(get_task_exe_file);
+
 /**
  * get_task_mm - acquire a reference to the task's mm
  *