# DF-2471 -- Missing channel bounds check in isp_parse_async (parallel SCSI)

Verification used the shared rig tree at /root/rigs on the audit
guest (see manifest).  The rig for this finding: dfv_isp  (rig.c = harness,
gen.sh = verbatim extractor, dfv_*_extract.h = generated production text).
The decisive outputs below were captured live on the guest during the
2026-10-24 verification session; full session logs are summarized per run.


## Build
    sh build.sh            # extracts verbatim driver text + builds the KLD

## Run (guest, root)
    kldload ./dfv_rig.ko
kldload dfv_isp.ko; sysctl kern.dfv_isp_run=3; sysctl -n kern.dfv_isp_status

## Expected
run.log: TRANSIT chan=5 -> guard smashed=1 first@+614; chan=5 RESET -> no observable change (bitfield); fixed: smashed=0 RESULT=clean.

## Fix validation
fix.diff rejects channels >= isp_nchan; A/B clean.

Verdict: reproduced / impact=limited_write (see verdict.json, VERDICT.md)