Date: Tue, 15 Mar 2022 16:34:12 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262573 Bug ID: 262573 Summary: PKU CPU instruction causing kernel panics when FreeBSD Guest OS, using Zen 3 host processor and QEMU hypervisor. Product: Base System Version: 12.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: firstname.lastname@example.org PKU is new in Zen3, I recently migrated a system from a 2600X CPU to a 5600G CPU. I then discovered in any guest machine running a variant of FreeBSD, it was very easy and repeatedly with certain binaries, and services to cause a kernel panic. I was able to nail it down to PKU by changing the cpu type to EPYC (which is close to Zen 1), and then manually adding Zen 3 instructions one at a time, this process eventually confirmed it was PKU. I have not yet tested FreeBSD 13 but plan to. When I test it, if it has the same problem I will post details of the actual panic and how to repeat. -- You are receiving this mail because: You are the assignee for the bug.