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ipv6: raw: check sk->sk_rcvbuf earlier

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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/20240307162943.2523817-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-03-07 16:29:43 +00:00 committed by Jakub Kicinski
parent 5d9b7cb383
commit 026763ece8
1 changed files with 7 additions and 0 deletions
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7
net/ipv6/raw.c
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@ -160,6 +160,13 @@ static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
if (!raw_v6_match(net, sk, nexthdr, daddr, saddr,
inet6_iif(skb), inet6_sdif(skb)))
continue;
if (atomic_read(&sk->sk_rmem_alloc) >=
READ_ONCE(sk->sk_rcvbuf)) {
atomic_inc(&sk->sk_drops);
continue;
}
delivered = true;
switch (nexthdr) {
case IPPROTO_ICMPV6: