This is a note to let you know that I've just added the patch titled
net: bridge: mst: Check vlan state for egress decision
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-bridge-mst-check-vlan-state-for-egress-decision.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7cf8072a377b76d3c95207202952772eb8e975c5
Author: Elliot Ayrey <elliot.ayrey@xxxxxxxxxxxxxxxxxxx>
Date: Fri Jul 12 13:31:33 2024 +1200
net: bridge: mst: Check vlan state for egress decision
[ Upstream commit 0a1868b93fad5938dbcca77286b25bf211c49f7a ]
If a port is blocking in the common instance but forwarding in an MST
instance, traffic egressing the bridge will be dropped because the
state of the common instance is overriding that of the MST instance.
Fix this by skipping the port state check in MST mode to allow
checking the vlan state via br_allowed_egress(). This is similar to
what happens in br_handle_frame_finish() when checking ingress
traffic, which was introduced in the change below.
Fixes: ec7328b59176 ("net: bridge: mst: Multiple Spanning Tree (MST) mode")
Signed-off-by: Elliot Ayrey <elliot.ayrey@xxxxxxxxxxxxxxxxxxx>
Acked-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index d97064d460dc7..e19b583ff2c6d 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -25,8 +25,8 @@ static inline int should_deliver(const struct net_bridge_port *p,
vg = nbp_vlan_group_rcu(p);
return ((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) &&
- p->state == BR_STATE_FORWARDING && br_allowed_egress(vg, skb) &&
- nbp_switchdev_allowed_egress(p, skb) &&
+ (br_mst_is_enabled(p->br) || p->state == BR_STATE_FORWARDING) &&
+ br_allowed_egress(vg, skb) && nbp_switchdev_allowed_egress(p, skb) &&
!br_skb_isolated(p, skb);
}
