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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: 6284c723d9 ("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>
This commit is contained in:
Clément Léger 2022-04-21 12:12:47 +02:00 committed by Jakub Kicinski
parent 5b0b9e4c2c
commit 7f40ea2145
1 changed files with 2 additions and 0 deletions
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2
net/bridge/br_switchdev.c
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@ -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) {