untrusted comment: signature from openbsd 6.1 base secret key
RWQEQa33SgQSEvgDRTzDzoZ9ztaeCOuctEXLbnUIeVa661TcEjCCjsy9tuhc32xizb9ln1cgVRl7BwddbXoO600JbE7nTyFCTwY=
OpenBSD 6.1 errata 011, June 12, 2017:
Fix an integer overflow in two range checks of the sti(4) display driver.
This issue only affects the hppa architecture.
And then rebuild and install a new kernel:
KK=`sysctl -n kern.osversion | cut -d# -f1`
cd /usr/src/sys/arch/`machine`/compile/$KK
make obj
make config
make
make install