提交 55747a0a 编写于 作者: E Eric Dumazet 提交者: David S. Miller

ipmr: __pim_rcv() is called under rcu_read_lock

No need to get a reference on reg_dev and release it, we are in a
rcu_read_lock() protected section.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 ddcb4541
......@@ -1805,6 +1805,7 @@ int ip_mr_input(struct sk_buff *skb)
}
#ifdef CONFIG_IP_PIMSM
/* called with rcu_read_lock() */
static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
unsigned int pimlen)
{
......@@ -1826,26 +1827,23 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
read_lock(&mrt_lock);
if (mrt->mroute_reg_vif_num >= 0)
reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev;
if (reg_dev)
dev_hold(reg_dev);
read_unlock(&mrt_lock);
if (reg_dev == NULL)
return 1;
skb->mac_header = skb->network_header;
skb_pull(skb, (u8*)encap - skb->data);
skb_pull(skb, (u8 *)encap - skb->data);
skb_reset_network_header(skb);
skb->protocol = htons(ETH_P_IP);
skb->ip_summed = 0;
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST;
skb_tunnel_rx(skb, reg_dev);
netif_rx(skb);
dev_put(reg_dev);
return 0;
return NET_RX_SUCCESS;
}
#endif
......
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