As this bug is in kernels built since May 2001, my venerable old distribution LinuxPPC won’t be vulnerable. We never did any real builds after April ’01, and i don’t think we ever released anything with a kernel above 2.2.
Granted, there’s probably not many boxes still running LinuxPPC. I feel like we dodged an invisible bullet, albeit by imploding. Not a good strategy for dealing with kernel security.