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    Subject[PATCH 5.10 106/125] net: send SYNACK packet with accepted fwmark
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    From: Alexander Ovechkin <ovov@yandex-team.ru>

    commit 43b90bfad34bcb81b8a5bc7dc650800f4be1787e upstream.

    commit e05a90ec9e16 ("net: reflect mark on tcp syn ack packets")
    fixed IPv4 only.

    This part is for the IPv6 side.

    Fixes: e05a90ec9e16 ("net: reflect mark on tcp syn ack packets")
    Signed-off-by: Alexander Ovechkin <ovov@yandex-team.ru>
    Acked-by: Dmitry Yakunin <zeil@yandex-team.ru>
    Reviewed-by: Eric Dumazet <edumazet@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/ipv6/tcp_ipv6.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/net/ipv6/tcp_ipv6.c
    +++ b/net/ipv6/tcp_ipv6.c
    @@ -540,7 +540,7 @@ static int tcp_v6_send_synack(const stru
    opt = ireq->ipv6_opt;
    if (!opt)
    opt = rcu_dereference(np->opt);
    - err = ip6_xmit(sk, skb, fl6, sk->sk_mark, opt,
    + err = ip6_xmit(sk, skb, fl6, skb->mark ? : sk->sk_mark, opt,
    tclass, sk->sk_priority);
    rcu_read_unlock();
    err = net_xmit_eval(err);

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