patch: new patch pattern free_netdev_usage.cocci

use free_netdev(netdev) instead of kfree()

Freeing netdev without free_netdev() leads to net, tx leaks.
And it may lead to dereferencing freed pointer.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: new patch pattern kfree_skb_usage.cocci

use kfree_skb() instead of kfree()

Use kfree_skb() instead of kfree() to free sk_buff.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: update static patch patterns

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: update patch pattern kfree_skb.cocci

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>