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ipv4: raw: check sk->sk_rcvbuf earlier 

There is no point cloning an skb and having to free the clone
if the receive queue of the raw socket is full.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240307163020.2524409-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-03-07 16:30:20 +00:00 committed by Jakub Kicinski
parent 026763ece8
commit d721812aa8
1 changed files with 7 additions and 0 deletions
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7
net/ipv4/raw.c
View File

@ -175,6 +175,13 @@ static int raw_v4_input(struct net *net, struct sk_buff *skb,
if (!raw_v4_match(net, sk, iph->protocol,
iph->saddr, iph->daddr, dif, sdif))
continue;
if (atomic_read(&sk->sk_rmem_alloc) >=
READ_ONCE(sk->sk_rcvbuf)) {
atomic_inc(&sk->sk_drops);
continue;
}
delivered = 1;
if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
ip_mc_sf_allow(sk, iph->daddr, iph->saddr,