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Date:   Thu, 22 Jul 2021 18:31:37 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alexander Ovechkin <ovov@...dex-team.ru>,
        Dmitry Yakunin <zeil@...dex-team.ru>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.10 106/125] net: send SYNACK packet with accepted fwmark

From: Alexander Ovechkin <ovov@...dex-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@...dex-team.ru>
Acked-by: Dmitry Yakunin <zeil@...dex-team.ru>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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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