# DF-1405 - Verification Verdict

**Status:** reproduced (reproduced=1)
**Impact:** none
**Confidence:** certain

## Finding
cuse_alloc_unit[] global arrays mutated under per-server lock instead of cuse_global_mtx

## Source Location
sys/dev/misc/cuse/cuse.c:181-711

## Verdict
Source-confirmed (complex fix): cuse_alloc_unit[] global arrays mutated under per-server lock instead . No diff in batch.

## Fix Status
not_applicable: source defect confirmed; complex fix not included in batch build

## Summary
cuse_alloc_unit[64]/cuse_alloc_unit_id[64] global arrays (cuse.c:181-182) mutated by cuse_alloc_unit_by_id_locked/cuse_free_unit_by_id_locked under pcs->mtx only, not cuse_global_mtx. Distinct servers have distinct pcs->mtx -> scan-then-write race across servers -> duplicate/lost unit allocations. Root only. Fix: acquire cuse_global_lock around all alloc/free unit operations.