Fails for me too 5.15.1 on Penryn, Ivybridge, Haswell and guest VMs on Zen3.
I had to rebuild the kernel from kernel.org using the config from Ubuntu Mainline but disabling the debian pem certs and "CONFIG_UBSAN_TRAP".
After that it worked on all the above architectures.
Fails for me too 5.15.1 on Penryn, Ivybridge, Haswell and guest VMs on Zen3.
I had to rebuild the kernel from kernel.org using the config from Ubuntu Mainline but disabling the debian pem certs and "CONFIG_ UBSAN_TRAP" .
After that it worked on all the above architectures.