staging: ks7010: avoid dereferencing packet if it is null

Updating tx_bytes from packet->len if packet is null will cause
a null pointer dereference, so only update tx_bytes if it packet
is not null.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ks7010/ks_wlan_net.c b/drivers/staging/ks7010/ks_wlan_net.c
index 1e21eb1..d69b4c9 100644 (file)
--- a/drivers/staging/ks7010/ks_wlan_net.c
+++ b/drivers/staging/ks7010/ks_wlan_net.c
@@ -3396,13 +3396,13 @@ void send_packet_complete(void *arg1, void *arg2)
 
        DPRINTK(3, "\n");
 
-       priv->nstats.tx_bytes += packet->len;
        priv->nstats.tx_packets++;
 
        if (netif_queue_stopped(priv->net_dev))
                netif_wake_queue(priv->net_dev);
 
        if (packet) {
+               priv->nstats.tx_bytes += packet->len;
                dev_kfree_skb(packet);
                packet = NULL;
        }