untrusted comment: signature from openbsd 6.1 base secret key
RWQEQa33SgQSEnCNqRgNEsANV+DEkdi+3XdFq3ZXbbYw0aONb8Yjh2AD6nL3/2nxdqcbwiUJ2sTGmO9LrpsYSYKQnFCVxqBwcww=
OpenBSD 6.1 errata 023, August 3, 2017:
An integer overflow in wsdisplay_cfg_ioctl() may result in
an out-of-bounds read.
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