> VLAN, BONDING, TEAM, MACSEC, MACVLAN, IPVLAN, VIRT_WIFI and VXLAN.
> But I couldn't test all interface types so there could be more device
> types which have similar problems.
Did you test virt_wifi? I don't see how it *doesn't* have the nesting
problem, and you didn't change it?
No, I see. You're limiting the nesting generally now in patch 1, and the
others are just lockdep fixups (I guess it's surprising virt_wifi
doesn't do this at all?).
FWIW I don't think virt_wifi really benefits at all from stacking, so we
could just do something like
--- a/drivers/net/wireless/virt_wifi.c
+++ b/drivers/net/wireless/virt_wifi.c
@@ -508,6 +508,9 @@ static int virt_wifi_newlink(struct net *src_net, struct net_device *dev,
else if (dev->mtu > priv->lowerdev->mtu)
return -EINVAL;
+ if (priv->lowerdev->ieee80211_ptr)
+ return -EINVAL;
+
err = netdev_rx_handler_register(priv->lowerdev, virt_wifi_rx_handler,
priv);
if (err) {
IMHO, but of course generally limiting the stack depth is needed anyway
and solves the problem well enough for virt_wifi.
johannes
