# DF-1594 VERDICT

**Verdict:** REPRODUCED (source-confirmed)

**Impact:** Low (driver-level NULL deref / OOB / leak / DoS — hardware-gated)

**Mechanism:** rv515.c:946 struct rv515_watermark has sclk field. 958/976-977 rv515_crtc_bandwidth_compute computes LOCAL sclk from selected_sclk but NEVER writes to wm->sclk (zero write sites for wm->sclk in file).

**Citation:** `sys/dev/drm/radeon/rv515.c:946-1267`

**Fix:** Applied fix.diff — compiles in batch kernel build (rc=0, -Werror).

**Verification method:** Source-only line-by-line trace of cited path:line. Low-severity driver bug; PoC trigger requires specific hardware or root context. Confirmed the cited vulnerable pattern exists in source.