On 7/21/22 8:31 AM, Chuck Tuffli wrote:
I have a virtual machine used to test the NVMe emulation in bhyve. All
of the tests in the VM pass running under FreeBSD 13.1-R, but the same
VM running under -current causes bhyve(8) to dump core because of a
segmentation fault.
git bisect identified the last "good" commit on main as
cb2ae6163174 sysvsem: Fix a typo
After this commit, there are a half-dozen commits related to merging
the llvm project release/14.x
Chuck and I put our heads together to find a way to reproduce this issue
and came up with this:
Attache a 1gb disk image as emulation type "nvme" to a VM of any recent
version, and run this command:
nvmecontrol io-passthru -o 0x2 -l 4096 -4 0x2ffff0 -r nvme0ns1
This fails gracefully on 13.0R and 13.1R, but panics the bhyve process
with a 14-CURRENT host after the LLVM 14 import.
I have detailed reproduction steps and the debug output in this bug report:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265749
Michael
