# DF-1823 - Source Verification

## Verdict: REPRODUCED (source-only confirmation)

**Finding**: sys/dev/raid/aac/aac_cam.c:620-621

**Mechanism**: aac_cam_complete bcopy of sense data uses min(sense_len, sense_returned) without bounding to destination sizeof(scsi_sense_data)=32. sense_len u8 max 255 → 223 byte heap overflow.

**Hardware dependency**: Requires AAC RAID controller with buggy/malicious sense data.

**Fix**: Clamp to min(sense_len, sizeof(struct scsi_sense_data), sense_returned).

## 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