netifd: make sure the vlan ifname fits into the buffer

Signed-off-by: John Crispin <john@phrozen.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/vlan.c b/vlan.c
index 221c79c..c3ab2d2 100644
--- a/vlan.c
+++ b/vlan.c
@@ -106,6 +106,9 @@ static struct device *get_vlan_device(struct device *dev, int id, bool create)
 	struct vlan_device *vldev;
 	struct device_user *dep;
 
+	if (strlen(dev->ifname) > (IFNAMSIZ - 6))
+		return NULL;
+
 	/* look for an existing interface before creating a new one */
 	list_for_each_entry(dep, &dev->users.list, list.list) {
 		if (dep->cb != vlan_dev_cb)