net: lapbether: fix double free

The function netdev_priv() returns the private data of the device. The
memory to store the private data is allocated in alloc_netdev() and is
released in netdev_free(). Calling kfree() on the return value of
netdev_priv() after netdev_free() results in a double free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 63f7490..0e3f8ed 100644 (file)
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -346,7 +346,6 @@ out:
 fail:
        dev_put(dev);
        free_netdev(ndev);
-       kfree(lapbeth);
        goto out;
 }