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vxlan: using pskb_may_pull as early as possible
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@gmail.com> Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 2 additions and 4 deletions
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@ -1437,9 +1437,6 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb)
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if (!in6_dev)
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goto out;
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if (!pskb_may_pull(skb, skb->len))
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goto out;
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iphdr = ipv6_hdr(skb);
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saddr = &iphdr->saddr;
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daddr = &iphdr->daddr;
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@ -1880,7 +1877,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
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return arp_reduce(dev, skb);
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#if IS_ENABLED(CONFIG_IPV6)
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else if (ntohs(eth->h_proto) == ETH_P_IPV6 &&
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skb->len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) &&
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pskb_may_pull(skb, sizeof(struct ipv6hdr)
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+ sizeof(struct nd_msg)) &&
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ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
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struct nd_msg *msg;
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