1. Forum
  2. Usenet
  3. COMP.UNIX.BSD.OPENBSD.ANN

  • OpenBSD Errata: July 31st, 2018 (amdlfence)

    From Bryan Steele@21:1/5 to All on Tue Jul 31 07:30:02 2018
    Errata patches for the kernel have been released for OpenBSD 6.3 and 6.2.

    On AMD CPUs, set a chicken bit which turns LFENCE into a serialization instruction against speculation.

    Binary updates for the amd64 and i386 platforms are available via the
    syspatch utility. Source code patches can be found on the respective
    errata pages:

    https://www.openbsd.org/errata62.html
    https://www.openbsd.org/errata63.html

    As these affect the kernel, a reboot will be needed after patching.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)