3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Li RongQing <roy.qing.li@xxxxxxxxx>
[ Upstream commit 91269e390d062b526432f2ef1352b8df82e0e0bc ]
pskb_may_pull should be used to check if skb->data has enough space,
skb->len can not ensure that.
Cc: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Signed-off-by: Li RongQing <roy.qing.li@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/vxlan.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1440,9 +1440,6 @@ static int neigh_reduce(struct net_devic
if (!in6_dev)
goto out;
- if (!pskb_may_pull(skb, skb->len))
- goto out;
-
iphdr = ipv6_hdr(skb);
saddr = &iphdr->saddr;
daddr = &iphdr->daddr;
@@ -1929,7 +1926,8 @@ static netdev_tx_t vxlan_xmit(struct sk_
return arp_reduce(dev, skb);
#if IS_ENABLED(CONFIG_IPV6)
else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
- skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) &&
+ pskb_may_pull(skb, sizeof(struct ipv6hdr)
+ + sizeof(struct nd_msg)) &&
ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
struct nd_msg *msg;
--
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