Re: [PATCH linux-next 3/4] macvlan: fix possible NULL pointer dereference in macvlan_dev_get_iflink

From: Patrick McHardy
Date: Tue Apr 14 2015 - 11:35:36 EST

On 14.04, Honggang LI wrote:
> On Tue, Apr 14, 2015 at 04:26:27PM +0100, Patrick McHardy wrote:
> >
> > That is completely useless. vlan (=netdev_priv) can not be NULL as
> > netdev_priv() never returns NULL and vlan->lowerdev is always valid
> > because a macvlan wouldn't make much sense otherwise.
> OK, please drop this patch.

Well, the fact that netdev_priv never return NULL implies all your
patches need to be redone.

And I suggest you check whether this condition can actually happen.
Just because it can in one driver says nothing at all about others.
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