CVE-2024-27410

In the Linux kernel, the following vulnerability has been resolved:

wifi: nl80211: reject iftype change with mesh ID change

It's currently possible to change the mesh ID when the

interface isn't yet in mesh mode, at the same time as

changing it into mesh mode. This leads to an overwrite

of data in the wdev->u union for the interface type it

currently has, causing cfg80211_change_iface() to do

wrong things when switching.

We could probably allow setting an interface to mesh

while setting the mesh ID at the same time by doing a

different order of operations here, but realistically

there's no userspace that's going to do this, so just

disallow changes in iftype when setting mesh ID.