netdev - [PATCH] net: qrtr: fix memort leak in qrtr_tun_write

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Date:   Tue, 10 Sep 2019 19:37:45 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, smccaman@....edu, kjlu@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] net: qrtr: fix memort leak in qrtr_tun_write_iter

In qrtr_tun_write_iter the allocated kbuf should be release in case of
error happening.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 net/qrtr/tun.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/net/qrtr/tun.c b/net/qrtr/tun.c
index ccff1e544c21..1dba8b92560e 100644
--- a/net/qrtr/tun.c
+++ b/net/qrtr/tun.c
@@ -84,12 +84,18 @@ 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);
+	if (ret < 0) {
+		kfree(kbuf);
+		return ret;
+	}
 
-	return ret < 0 ? ret : len;
+	return len;
 }
 
 static __poll_t qrtr_tun_poll(struct file *filp, poll_table *wait)
-- 
2.17.1