Commit ce6502a8 authored by Li RongQing's avatar Li RongQing Committed by David S. Miller

vxlan: fix a use after free in vxlan_encap_bypass

when netif_rx() is done, the netif_rx handled skb maybe be freed,
and should not be used.
Signed-off-by: default avatarLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4e8febd0
......@@ -1668,6 +1668,8 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
struct pcpu_sw_netstats *tx_stats, *rx_stats;
union vxlan_addr loopback;
union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
struct net_device *dev = skb->dev;
int len = skb->len;
tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
......@@ -1691,16 +1693,16 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
u64_stats_update_begin(&tx_stats->syncp);
tx_stats->tx_packets++;
tx_stats->tx_bytes += skb->len;
tx_stats->tx_bytes += len;
u64_stats_update_end(&tx_stats->syncp);
if (netif_rx(skb) == NET_RX_SUCCESS) {
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
rx_stats->rx_bytes += skb->len;
rx_stats->rx_bytes += len;
u64_stats_update_end(&rx_stats->syncp);
} else {
skb->dev->stats.rx_dropped++;
dev->stats.rx_dropped++;
}
}
......
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