OpenBSD Errata: June 8, 2021 (cpuswitch inteldrm)

7 June, 2021 by bluhm@openbsd.org | openbsd

Errata patches for cpuswitch and inteldrm have been released for
OpenBSD 6.8 and 6.9.

Recent Intel or any AMD machines could crash as the kernel did not
flush all TLBs that multi threaded processes require.

Disable PPGTT on Intel machines with cherryview/braswell graphics
to avoid memory corruption.

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

  https://www.openbsd.org/errata68.html
  https://www.openbsd.org/errata69.html

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