--- zzzz-none-000/linux-3.10.107/security/tomoyo/util.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/security/tomoyo/util.c	2021-02-04 17:41:59.000000000 +0000
@@ -948,15 +948,18 @@
  */
 const char *tomoyo_get_exe(void)
 {
+	struct file *exe_file;
+	const char *cp;
 	struct mm_struct *mm = current->mm;
-	const char *cp = NULL;
 
 	if (!mm)
 		return NULL;
-	down_read(&mm->mmap_sem);
-	if (mm->exe_file)
-		cp = tomoyo_realpath_from_path(&mm->exe_file->f_path);
-	up_read(&mm->mmap_sem);
+	exe_file = get_mm_exe_file(mm);
+	if (!exe_file)
+		return NULL;
+
+	cp = tomoyo_realpath_from_path(&exe_file->f_path);
+	fput(exe_file);
 	return cp;
 }