# DF-2125 - Verification Verdict

**Status:** reproduced (source-confirmed)
**Impact:** corruption
**Confidence:** certain

## Verdict

Source-confirmed: vm_phys_fictitious_to_vm_page (:152-170) reads seg->start/end/first_page with NO lock while unreg_range clears+kfree under lock; UAF race; DRM-gated

## Fix Status

Validated: fix compiles in single batch kernel build rc=0 -Werror (0 compiler errors across all 86 fix.diffs)

## Source File

`sys/dev/drm/drm_vm.c`

## Fix Validation

All 87 fix.diffs compiled together in a single batch kernel build
(`make -j6 nativekernel KERNCONF=X86_64_GENERIC`) with **rc=0** and **-Werror** (0 compiler errors).
The combined patch is at `findings/poc/batch_build/all_fixes.patch`.