[PATCH] net: qrtr: fix memory leak in qrtr_tun_read_iter

[Navid Emamdoost]

In qrtr_tun_read_iter we need an error handling path to appropriately
release skb in cases of error.

Signed-off-by: Navid Emamdoost <navid.emamdo...@gmail.com>
---
 net/qrtr/tun.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/net/qrtr/tun.c b/net/qrtr/tun.c
index e35869e81766..0f6e6d1d2901 100644
--- a/net/qrtr/tun.c
+++ b/net/qrtr/tun.c
@@ -54,19 +54,24 @@ static ssize_t qrtr_tun_read_iter(struct kiocb *iocb, 
struct iov_iter *to)
        int count;
 
        while (!(skb = skb_dequeue(&tun->queue))) {
-               if (filp->f_flags & O_NONBLOCK)
-                       return -EAGAIN;
+               if (filp->f_flags & O_NONBLOCK) {
+                       count = -EAGAIN;
+                       goto out;
+               }
 
                /* Wait until we get data or the endpoint goes away */
                if (wait_event_interruptible(tun->readq,
-                                            !skb_queue_empty(&tun->queue)))
-                       return -ERESTARTSYS;
+                                            !skb_queue_empty(&tun->queue))) {
+                       count = -ERESTARTSYS;
+                       goto out;
+               }
        }
 
        count = min_t(size_t, iov_iter_count(to), skb->len);
        if (copy_to_iter(skb->data, count, to) != count)
                count = -EFAULT;
 
+out:
        kfree_skb(skb);
 
        return count;
-- 
2.17.1