[Bridge] [PATCH net-next] net: bridge: switchdev: check br_vlan_group() return value

[Clément Léger via Bridge]

br_vlan_group() can return NULL and thus return value must be checked
to avoid dereferencing a NULL pointer.

Fixes: 6284c723d9b9 ("net: bridge: mst: Notify switchdev drivers of VLAN MSTI 
migrations")
Signed-off-by: Clément Léger <clement.le...@bootlin.com>
---
 net/bridge/br_switchdev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
index 81400e0b26ac..8f3d76c751dd 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -354,6 +354,8 @@ static int br_switchdev_vlan_attr_replay(struct net_device 
*br_dev,
        attr.orig_dev = br_dev;
 
        vg = br_vlan_group(br);
+       if (!vg)
+               return 0;
 
        list_for_each_entry(v, &vg->vlan_list, vlist) {
                if (v->msti) {
-- 
2.34.1