diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 65706824eb82..7c8db8f6f661 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1971,6 +1971,14 @@ napi_busy:
 		int queue_len;
 
 		spin_lock_bh(&queue->lock);
+
+		if (unlikely(tfile->detached)) {
+			spin_unlock_bh(&queue->lock);
+			rcu_read_unlock();
+			err = -EBUSY;
+			goto free_skb;
+		}
+
 		__skb_queue_tail(queue, skb);
 		queue_len = skb_queue_len(queue);
 		spin_unlock(&queue->lock);
@@ -2506,6 +2514,13 @@ build:
 	if (tfile->napi_enabled) {
 		queue = &tfile->sk.sk_write_queue;
 		spin_lock(&queue->lock);
+
+		if (unlikely(tfile->detached)) {
+			spin_unlock(&queue->lock);
+			kfree_skb(skb);
+			return -EBUSY;
+		}
+
 		__skb_queue_tail(queue, skb);
 		spin_unlock(&queue->lock);
 		ret = 1;