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netpoll: accept NULL np argument in netpoll_send_skb()

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netpoll_send_skb() callers seem to leak skb if
the np pointer is NULL. While this should not happen, we
can make the code more robust.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2020-05-07 09:32:21 -07:00 • committed by David S. Miller
parent 1ddabdfaf7
commit f78ed2204d
7 changed files with 17 additions and 24 deletions
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5
net/dsa/slave.c
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@ -445,12 +445,11 @@ static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
#ifdef CONFIG_NET_POLL_CONTROLLER
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->netpoll)
netpoll_send_skb(p->netpoll, skb);
return netpoll_send_skb(p->netpoll, skb);
#else
BUG();
#endif
return NETDEV_TX_OK;
#endif
}
static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,