diff --git a/fs/proc/array.c b/fs/proc/array.c
index 07f77a7945c320e7b9ac133e523f83b9824691e2..822c2d5065189906cd6a63bedd27875290964e04 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -571,7 +571,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
 		rsslim,
 		mm ? mm->start_code : 0,
 		mm ? mm->end_code : 0,
-		(permitted) ? task->stack_start : 0,
+		(permitted && mm) ? task->stack_start : 0,
 		esp,
 		eip,
 		/* The signal information here is obsolete.