OpenBSD Errata: November 29th, 2018 (qcow2)
29 November, 2018 by email@example.com | openbsd
Errata patches for vmd have been released for OpenBSD 6.4. Writing more than 4GB to a qcow2 volume corrupts the virtual disk. Binary updates for the amd64 and i386 platforms are available via the syspatch utility. Source code patches can be found on the errata page: https://www.openbsd.org/errata64.html After patching, restart the vmd service.