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| author | Jason Xing <kernelxing@tencent.com> | 2024-02-26 11:22:21 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-28 10:39:21 +0000 |
| commit | ed43e76cdcc497e2b27d84db27e7df5612be2643 (patch) | |
| tree | d0df88b66acd7c96a9925d65339c25785d79d770 /net/ipv6/syncookies.c | |
| parent | a4a69a3719ec55f677b8481f58215b6338b781e5 (diff) | |
| download | lwn-ed43e76cdcc497e2b27d84db27e7df5612be2643.tar.gz lwn-ed43e76cdcc497e2b27d84db27e7df5612be2643.zip | |
tcp: directly drop skb in cookie check for ipv6
Like previous patch does, only moving skb drop logical code to
cookie_v6_check() for later refinement.
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/syncookies.c')
| -rw-r--r-- | net/ipv6/syncookies.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index 6b9c69278819..ea0d9954a29f 100644 --- a/net/ipv6/syncookies.c +++ b/net/ipv6/syncookies.c @@ -177,6 +177,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) struct sock *ret = sk; __u8 rcv_wscale; int full_space; + SKB_DR(reason); if (!READ_ONCE(net->ipv4.sysctl_tcp_syncookies) || !th->ack || th->rst) @@ -256,10 +257,13 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) ireq->ecn_ok &= cookie_ecn_ok(net, dst); ret = tcp_get_cookie_sock(sk, skb, req, dst); + if (!ret) + goto out_drop; out: return ret; out_free: reqsk_free(req); out_drop: + kfree_skb_reason(skb, reason); return NULL; } |