OpenBSD Errata: November 22nd, 2019 (inteldrm)

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OpenBSD Errata: November 22nd, 2019 (inteldrm)

T.J. Townsend
Errata patches for the kernel have been released for OpenBSD 6.5 and 6.6.

A local user could cause the system to hang by reading specific registers
when Intel Gen8/Gen9 graphics hardware is in a low power state.

A local user could perform writes to memory that should be blocked with
Intel Gen9 graphics hardware.

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

  https://www.openbsd.org/errata65.html
  https://www.openbsd.org/errata66.html

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