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authorEric Dumazet <edumazet@google.com>2024-03-07 16:29:43 +0000
committerJakub Kicinski <kuba@kernel.org>2024-03-08 11:39:29 -0800
commit026763ece881b4c636173c25d012cde085689027 (patch)
tree5e99a3e0fec491ad175a3343d85d53a6ae36a6a1 /net
parent5d9b7cb383bb3228d72066c15206299858214f92 (diff)
ipv6: 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/20240307162943.2523817-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/raw.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 779274055abf..ca49e6617afa 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -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: