1 files changed, 22 insertions, 7 deletions

diff --git a/net/qrtr/tun.c b/net/qrtr/tun.c
index ccff1e544c21..304b41fea5ab 100644
--- a/net/qrtr/tun.c
+++ b/net/qrtr/tun.c
@@ -31,6 +31,7 @@ static int qrtr_tun_send(struct qrtr_endpoint *ep, struct sk_buff *skb)
 static int qrtr_tun_open(struct inode *inode, struct file *filp)
 {
 	struct qrtr_tun *tun;
+	int ret;
 
 	tun = kzalloc(sizeof(*tun), GFP_KERNEL);
 	if (!tun)
@@ -43,7 +44,16 @@ static int qrtr_tun_open(struct inode *inode, struct file *filp)
 
 	filp->private_data = tun;
 
-	return qrtr_endpoint_register(&tun->ep, QRTR_EP_NID_AUTO);
+	ret = qrtr_endpoint_register(&tun->ep, QRTR_EP_NID_AUTO);
+	if (ret)
+		goto out;
+
+	return 0;
+
+out:
+	filp->private_data = NULL;
+	kfree(tun);
+	return ret;
 }
 
 static ssize_t qrtr_tun_read_iter(struct kiocb *iocb, struct iov_iter *to)
@@ -80,15 +90,24 @@ static ssize_t qrtr_tun_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	ssize_t ret;
 	void *kbuf;
 
+	if (!len)
+		return -EINVAL;
+
+	if (len > KMALLOC_MAX_SIZE)
+		return -ENOMEM;
+
 	kbuf = kzalloc(len, GFP_KERNEL);
 	if (!kbuf)
 		return -ENOMEM;
 
-	if (!copy_from_iter_full(kbuf, len, from))
+	if (!copy_from_iter_full(kbuf, len, from)) {
+		kfree(kbuf);
 		return -EFAULT;
+	}
 
 	ret = qrtr_endpoint_post(&tun->ep, kbuf, len);
 
+	kfree(kbuf);
 	return ret < 0 ? ret : len;
 }
 
@@ -108,15 +127,11 @@ static __poll_t qrtr_tun_poll(struct file *filp, poll_table *wait)
 static int qrtr_tun_release(struct inode *inode, struct file *filp)
 {
 	struct qrtr_tun *tun = filp->private_data;
-	struct sk_buff *skb;
 
 	qrtr_endpoint_unregister(&tun->ep);
 
 	/* Discard all SKBs */
-	while (!skb_queue_empty(&tun->queue)) {
-		skb = skb_dequeue(&tun->queue);
-		kfree_skb(skb);
-	}
+	skb_queue_purge(&tun->queue);
 
 	kfree(tun);