This is the guard for one of the two doors on the walk-with-no-store defect:
"neither control block decodes" is not evidence of a packed image, so the packed
reader is allowed only for a device that begins with the image header's own magic —
the question the userspace raw reader has always asked and the kernel did not.
It builds clean and it does NOT stop the reproduction: `cube_store=/dev/null
cubelinux.enum=1` still serves invented records at the same rate. So the guard is
not on the path that answers, and it is committed for that reason stated plainly
rather than installed: this machine stays on #87, which is measured, instead of
moving to a kernel whose only change is one that has not been shown to do anything.
Kept rather than reverted because the check is right on its own terms — an
addressed store begins with CUBS, a bare packed image with CUBE — and because the
next attempt should begin by asking whether this guard is even reached before
writing another one.
surface-camera-build
9fb4169e52