From 4c88cfcc6738466a33778c346061f7507403276a Mon Sep 17 00:00:00 2001 From: Ralf Lici Date: Wed, 4 Jun 2025 15:11:58 +0200 Subject: [PATCH] ovpn: propagate socket mark to skb in UDP OpenVPN allows users to configure a FW mark on sockets used to communicate with other peers. The mark is set by means of the `SO_MARK` Linux socket option. However, in the ovpn UDP code path, the socket's `sk_mark` value is currently ignored and it is not propagated to outgoing `skbs`. This commit ensures proper inheritance of the field by setting `skb->mark` to `sk->sk_mark` before handing the `skb` to the network stack for transmission. Fixes: 08857b5ec5d9 ("ovpn: implement basic TX path (UDP)") Reviewed-by: Sabrina Dubroca Signed-off-by: Ralf Lici Link: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg31877.html Signed-off-by: Antonio Quartulli --- drivers/net/ovpn/udp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c index bff00946eae2d..60435a21f29ca 100644 --- a/drivers/net/ovpn/udp.c +++ b/drivers/net/ovpn/udp.c @@ -344,6 +344,7 @@ void ovpn_udp_send_skb(struct ovpn_peer *peer, struct sock *sk, int ret; skb->dev = peer->ovpn->dev; + skb->mark = READ_ONCE(sk->sk_mark); /* no checksum performed at this layer */ skb->ip_summed = CHECKSUM_NONE; -- 2.47.2