diff options
| author | Li RongQing <roy.qing.li@gmail.com> | 2014-10-16 04:49:41 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-16 07:30:28 +0400 |
| commit | ce6502a8f9572179f044a4d62667c4645256d6e4 (patch) | |
| tree | a202461eca26813b11236fdb5f8353922504fa89 | |
| parent | 4e8febd0a76333875636859e0092a14c1fba49e4 (diff) | |
| download | linux-ce6502a8f9572179f044a4d62667c4645256d6e4.tar.xz | |
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: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/vxlan.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 2a51e6e48e1e..faf1bd1f1ecf 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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++; } } |