⬢ DragonFlyBSD Kernel Audit
DF-4974 / manifest.json
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{
  "finding_id": "DF-4974",
  "verdict": "not_reproduced",
  "impact": "none",
  "confidence": "likely",
  "summary": "radeon_crtc_cursor_set2 pins an arbitrary-size user GEM BO as the cursor with no size validation; display engine fetches up to 64*64*4=16KiB (plus legacy yorigin*256) from the BO start, reading adjacent VRAM to the physical screen (real-HW info leak; guest has no GPU).",
  "reproduce": {
    "build": "./build.sh",
    "run": "./run.sh",
    "expected": "real HW: undersized cursor BO renders adjacent VRAM as cursor pixels; this guest: exit=1, open /dev/dri/card0 -> ENOENT"
  },
  "kernel_refs": [
    "sys/dev/drm/radeon/radeon_cursor.c:295",
    "sys/dev/drm/radeon/radeon_cursor.c:301",
    "sys/dev/drm/radeon/radeon_cursor.c:314",
    "sys/dev/drm/radeon/radeon_cursor.c:218",
    "sys/dev/drm/radeon/radeon_cursor.c:241",
    "sys/dev/drm/radeon/radeon_display.c:661",
    "sys/dev/drm/drm_plane.c:935",
    "sys/dev/drm/drm_ioctl.c:659"
  ],
  "artifacts": [
    "cursor_oob.c",
    "build.sh",
    "run.sh",
    "build.log",
    "run.log",
    "VERDICT.md",
    "README.md",
    "fix.diff",
    "manifest.json",
    "verdict.json"
  ]
}