# DF-0254 -- Low

## Verdict: REPRODUCED (source-confirmed)

REAL: success path caches nch then zeroes nd; cache_unlock(&nch) (line 102) releases the lock but cache_drop is never called, so the ncp+mount reference leaks on every call (slow unbounded leak).

## Impact ceiling
none

## Cited refs
- sys/kern/vfs_synth.c:102

## Fix
Add cache_drop(&nch) after cache_unlock to release the leaked reference.

## Validation
Combined 60-finding fix kernel (findings/poc/_low_merged.patch) built `make -j6 nativekernel KERNCONF=X86_64_GENERIC` => rc=0, 0 errors, -Werror. fix_status=fixed.