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| author |   Eric Dumazet <edumazet@google.com> | 2015-10-04 21:08:08 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-05 02:45:24 -0700 |
| commit | caf3f2676aaad395903d24a54e22f8ac4bc4823d (patch) | |
| tree | 2892221a8b1f40f57e8c8bac5a6e453991e34a61 /include | |
| parent | tcp: fix fastopen races vs lockless listener (diff) | |
| download | linux-dev-caf3f2676aaad395903d24a54e22f8ac4bc4823d.tar.xz linux-dev-caf3f2676aaad395903d24a54e22f8ac4bc4823d.zip | |
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: ca6fb0651883 ("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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 91a6b2c88341..aa7811993276 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -323,12 +323,15 @@ static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst, static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb) { - if (!skb->sk || ip_sk_use_pmtu(skb->sk)) { + struct sock *sk = skb->sk; + + if (!sk || !sk_fullsock(sk) || ip_sk_use_pmtu(sk)) { bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED; + return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding); - } else { - return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU); } + + return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU); } u32 ip_idents_reserve(u32 hash, int segs); |