# DF-1565 VERDICT

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

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

**Mechanism:** hpt27xx_osm_bsd.c:1290 ioctl_args.lpOutBuffer = kmalloc(nOutBufferSize, M_DEVBUF, M_WAITOK) NO M_ZERO. ldm_ioctl writes only the ioctl-required bytes (sizeof(CONTROLLER_INFO) etc). 1302-1305 copyout(l

**Citation:** `sys/dev/raid/hpt27xx/hpt27xx_osm_bsd.c:1289-1305`

**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.