DF-0628 patched-kernel validation (3000 iterations, no panic):
DF-0628: smbiod UAF race trigger
  500 iterations across 6 processes
  expect intermittent panic on SMP (race-dependent)
  if no panic: race did not hit this run; bug still confirmed in source

DF-0628: completed (no panic observed this run)
RC=0; guest still up