inet: ip_skb_dst_mtu() should use sk_fullsock()
SYN_RECV & TIMEWAIT sockets are not full blown,
do not even try to call ip_sk_use_pmtu() on them.
Fixes: ca6fb06518
("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
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@ -323,12 +323,15 @@ static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
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static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb)
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{
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if (!skb->sk || ip_sk_use_pmtu(skb->sk)) {
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struct sock *sk = skb->sk;
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if (!sk || !sk_fullsock(sk) || ip_sk_use_pmtu(sk)) {
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bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;
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return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding);
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} else {
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return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU);
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}
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return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU);
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}
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u32 ip_idents_reserve(u32 hash, int segs);
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