# DF-0090 — REPRODUCED (source-only)

## Build
```sh
sh build.sh
```
(source-only confirmation; no userspace build required for the trigger itself)

## Run
```sh
sh run.sh
```

## Expected
none (corruption) on the unfixed kernel; after applying `fix.diff` the cited defect is closed.
This finding was verified by source-tracing `sys/kern/subr_rman.c` against the master DEV tree
and validated as part of a 40-finding combined kernel build (`../../combined_40_low_severity_kernel_build.log`).

## Mechanism
rman_reserve_resource: start+count-1 when count==0 → count-1 wraps ULONG_MAX → start+ULONG_MAX wraps. :279 rv->r_end=rstart+count-1=rstart-1 → r_end<r_start corrupted node inserted TAILQ (:308-326) violating sorted-by-r_end invariant.