# DF-1969 - Source Verification

## Verdict: REPRODUCED (source-only confirmation)

**Finding**: sys/dev/drm/radeon/radeon_fb.c:322-333

**Mechanism**: radeonfb_create error path has dead if(rbo){} and GEM object leak: error gotos before fb assignment leave fb=NULL so if(fb&&ret) is false, drm_gem_object_put_unlocked never called → pinned VRAM permanently leaked.

**Hardware dependency**: Requires radeon GPU.

**Fix**: Reserve rbo on error; put GEM object when ret && gobj; cleanup fb if non-NULL.

## Verification method
Source-only confirmation. The cited code path was traced line-by-line in the
audited sys/ tree. The bug exists exactly as described. This is a HW-gated
driver finding — the vulnerable code path requires specific hardware (GPU,
controller, PHY, TPM, etc.) not present in the QEMU audit guest. Runtime
reproduction on this guest is not possible without the hardware.

## Fix validation
fix.diff authored and applied to guest source. All 40 fixes in this batch
compile cleanly in a single combined kernel build: `make -j6 nativekernel
KERNCONF=X86_64_GENERIC` → rc=0, zero -Werror violations.

**Kernel**: DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026