diff options
author | Peter Kosyh <p.kosyh@gmail.com> | 2019-07-19 11:11:47 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-07-21 13:32:51 -0700 |
commit | 107e47cc80ec37cb332bd41b22b1c7779e22e018 (patch) | |
tree | ad7e68bbfcbb8e66acce7611af31597eadfd9ca9 /drivers/net | |
parent | 903e9d1bffb557220af276eda97b9d6b103ec9e0 (diff) | |
download | linux-107e47cc80ec37cb332bd41b22b1c7779e22e018.tar.bz2 |
vrf: make sure skb->data contains ip header to make routing
vrf_process_v4_outbound() and vrf_process_v6_outbound() do routing
using ip/ipv6 addresses, but don't make sure the header is available
in skb->data[] (skb_headlen() is less then header size).
Case:
1) igb driver from intel.
2) Packet size is greater then 255.
3) MPLS forwards to VRF device.
So, patch adds pskb_may_pull() calls in vrf_process_v4/v6_outbound()
functions.
Signed-off-by: Peter Kosyh <p.kosyh@gmail.com>
Reviewed-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/vrf.c | 58 |
1 files changed, 35 insertions, 23 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 54edf8956a25..6e84328bdd40 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -165,23 +165,29 @@ static int vrf_ip6_local_out(struct net *net, struct sock *sk, static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, struct net_device *dev) { - const struct ipv6hdr *iph = ipv6_hdr(skb); + const struct ipv6hdr *iph; struct net *net = dev_net(skb->dev); - struct flowi6 fl6 = { - /* needed to match OIF rule */ - .flowi6_oif = dev->ifindex, - .flowi6_iif = LOOPBACK_IFINDEX, - .daddr = iph->daddr, - .saddr = iph->saddr, - .flowlabel = ip6_flowinfo(iph), - .flowi6_mark = skb->mark, - .flowi6_proto = iph->nexthdr, - .flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF, - }; + struct flowi6 fl6; int ret = NET_XMIT_DROP; struct dst_entry *dst; struct dst_entry *dst_null = &net->ipv6.ip6_null_entry->dst; + if (!pskb_may_pull(skb, ETH_HLEN + sizeof(struct ipv6hdr))) + goto err; + + iph = ipv6_hdr(skb); + + memset(&fl6, 0, sizeof(fl6)); + /* needed to match OIF rule */ + fl6.flowi6_oif = dev->ifindex; + fl6.flowi6_iif = LOOPBACK_IFINDEX; + fl6.daddr = iph->daddr; + fl6.saddr = iph->saddr; + fl6.flowlabel = ip6_flowinfo(iph); + fl6.flowi6_mark = skb->mark; + fl6.flowi6_proto = iph->nexthdr; + fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF; + dst = ip6_route_output(net, NULL, &fl6); if (dst == dst_null) goto err; @@ -237,21 +243,27 @@ static int vrf_ip_local_out(struct net *net, struct sock *sk, static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, struct net_device *vrf_dev) { - struct iphdr *ip4h = ip_hdr(skb); + struct iphdr *ip4h; int ret = NET_XMIT_DROP; - struct flowi4 fl4 = { - /* needed to match OIF rule */ - .flowi4_oif = vrf_dev->ifindex, - .flowi4_iif = LOOPBACK_IFINDEX, - .flowi4_tos = RT_TOS(ip4h->tos), - .flowi4_flags = FLOWI_FLAG_ANYSRC | FLOWI_FLAG_SKIP_NH_OIF, - .flowi4_proto = ip4h->protocol, - .daddr = ip4h->daddr, - .saddr = ip4h->saddr, - }; + struct flowi4 fl4; struct net *net = dev_net(vrf_dev); struct rtable *rt; + if (!pskb_may_pull(skb, ETH_HLEN + sizeof(struct iphdr))) + goto err; + + ip4h = ip_hdr(skb); + + memset(&fl4, 0, sizeof(fl4)); + /* needed to match OIF rule */ + fl4.flowi4_oif = vrf_dev->ifindex; + fl4.flowi4_iif = LOOPBACK_IFINDEX; + fl4.flowi4_tos = RT_TOS(ip4h->tos); + fl4.flowi4_flags = FLOWI_FLAG_ANYSRC | FLOWI_FLAG_SKIP_NH_OIF; + fl4.flowi4_proto = ip4h->protocol; + fl4.daddr = ip4h->daddr; + fl4.saddr = ip4h->saddr; + rt = ip_route_output_flow(net, &fl4, NULL); if (IS_ERR(rt)) goto err; |