net: qrtr: fix memort leak in qrtr_tun_write_iter

commit a21b7f0cff1906a93a0130b74713b15a0b36481d upstream.

In qrtr_tun_write_iter the allocated kbuf should be release in case of
error or success return.

v2 Update: Thanks to David Miller for pointing out the release on success
path as well.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/qrtr/tun.c b/net/qrtr/tun.c
index ccff1e5..e35869e 100644 (file)
--- a/net/qrtr/tun.c
+++ b/net/qrtr/tun.c
@@ -84,11 +84,14 @@ static ssize_t qrtr_tun_write_iter(struct kiocb *iocb, struct iov_iter *from)
        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;
 }