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From:   Aymen Qader <qader.aymen@gmail.com>
Cc:     Wolfram Sang <wsa@the-dreams.de>,
        Aymen Qader <qader.aymen@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: [PATCH] staging: ks7010: Add null pointer check for skb
Date:   Thu, 27 Sep 2018 16:05:44 +0100
Message-Id: <20180927150544.14632-1-qader.aymen@gmail.com>
To:     unlisted-recipients:; (no To-header on input)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add a null pointer check for the socket buffer in ks_hostif.c to avoid a
possible null pointer deference.

Signed-off-by: Aymen Qader <qader.aymen@gmail.com>
---
 drivers/staging/ks7010/ks_hostif.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c
index 0e554e3359b5..4a5bc7858ef7 100644
--- a/drivers/staging/ks7010/ks_hostif.c
+++ b/drivers/staging/ks7010/ks_hostif.c
@@ -1011,6 +1011,11 @@ int hostif_data_request(struct ks_wlan_private *priv, struct sk_buff *skb)
 	size_t size;
 	int ret;
 
+	if(!skb) {
+		ret = -ENOMEM;
+		goto err_kfree;
+	}
+
 	skb_len = skb->len;
 	if (skb_len > ETH_FRAME_LEN) {
 		netdev_err(priv->net_dev, "bad length skb_len=%d\n", skb_len);
-- 
2.17.1