diff --git a/fs/exec.c b/fs/exec.c
index 77603ceed51f9..1310fb4d5f0d4 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1037,8 +1037,12 @@ static int exec_mmap(struct mm_struct *mm)
 	task_lock(tsk);
 	active_mm = tsk->active_mm;
 	membarrier_exec_mmap(mm);
+
+	preempt_disable();
 	tsk->mm = mm;
 	tsk->active_mm = mm;
+	preempt_enable();
+
 	activate_mm(active_mm, mm);
 	tsk->mm->vmacache_seqnum = 0;
 	vmacache_flush(tsk);