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net: bridge: mst: Check vlan state for egress decision

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[ Upstream commit 0a1868b93f ]

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: ec7328b591 ("net: bridge: mst: Multiple Spanning Tree (MST) mode")
Signed-off-by: Elliot Ayrey <elliot.ayrey@alliedtelesis.co.nz>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Elliot Ayrey
2024-07-12 13:31:33 +12:00
committed by Greg Kroah-Hartman
parent 1214406920
commit f7fb60b538
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/bridge/br_forward.c
+2 -2
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@@ -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);
}