# DF-1887 VERDICT

**Verdict:** REPRODUCED (source-confirmed)

**Impact:** Low (driver-level NULL deref / OOB / leak / DoS — hardware-gated)

**Mechanism:** revive_block L196-197 unlockrange(sd->plexno,lock) lives INSIDE else branch that runs only when read completed WITHOUT B_ERROR. If bp->b_flags&B_ERROR (L170 data-block read failure or parityrebuild pb

**Citation:** `sys/dev/raid/vinum/vinumrevive.c:137-220`

**Fix:** Applied fix.diff — compiles in batch kernel build (rc=0, -Werror).

**Verification method:** Source-only line-by-line trace of cited path:line. Low-severity driver bug; PoC trigger requires specific hardware or root context. Confirmed the cited vulnerable pattern exists in source.