From c44a44ed52c467523d28a7764ee01e23d3928945 Mon Sep 17 00:00:00 2001 From: Li Zhong Date: Mon, 19 Sep 2022 00:46:00 -0700 Subject: [PATCH] net/8021q/vlan: check the return value of vlan_vid_add() Check the return value of vlan_vid_add() which could fail and return error code. Signed-off-by: Li Zhong --- net/8021q/vlan.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index e40aa3e3641cbf..e96aefd00a6ebd 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -382,7 +382,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { pr_info("adding VLAN 0 to HW filter on device %s\n", dev->name); - vlan_vid_add(dev, htons(ETH_P_8021Q), 0); + int err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0); + + if (err) + return notifier_from_errno(err); } if (event == NETDEV_DOWN && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))