Except that patch is clearly BS! You can't patch a double-read vulnerability by checking for a capability; that's not a thing that works. So either the description is wrong, or the patch is wrong, or both.

And the point of the reverts is that the kernel maintainers don't have the unlimited time that would be necessary to re-review all of these questionable patches for probable malicious underhanded C, so they are reverted for now for triage (not permanently).

For the linked patch, I would judge it possibly malicious as it leaves the identified vulnerability in the kernel for later exploit by the attackers, namely, the UMN research team.