untrusted comment: verify with openbsd-65-base.pub
RWSZaRmt1LEQT74auHlzBnBwI9t9E063d9yHoMDSr+6lwIU3WTg3tJdoJmMFs8ToFZyCGOXZlxDXP1N3mLEtqFPtytsvttMQQgE=

OpenBSD 6.5 errata 035, April 19, 2020:

Incorrect test for root in drm linux compatiblity code.

Apply by doing:
    signify -Vep /etc/signify/openbsd-65-base.pub -x 035_drm.patch.sig \
        -m - | (cd /usr/src && patch -p0)

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

Index: sys/dev/pci/drm/drm_linux.h
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/drm_linux.h,v
retrieving revision 1.92.2.1
diff -u -p -r1.92.2.1 drm_linux.h
--- sys/dev/pci/drm/drm_linux.h	24 Nov 2019 00:10:22 -0000	1.92.2.1
+++ sys/dev/pci/drm/drm_linux.h	17 Apr 2020 06:46:45 -0000
@@ -2114,7 +2114,7 @@ static inline int
 capable(int cap)
 {
 	KASSERT(cap == CAP_SYS_ADMIN);
-	return suser(curproc);
+	return suser(curproc) == 0;
 }
 
 typedef int pgprot_t;