From 7f40ea2145d926510b27b785562d2c92df1b0d91 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= <clement.leger@bootlin.com>
Date: Thu, 21 Apr 2022 12:12:47 +0200
Subject: [PATCH] net: bridge: switchdev: check br_vlan_group() return value
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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.leger@bootlin.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20220421101247.121896-1-clement.leger@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
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 8cc44c367231..18affda2b522 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -353,6 +353,8 @@ 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) {