=== env ===
DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #1: Sun Sep 20 19:20:23 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
=== 1. load acpi_video (attach: LCD0._BCL call #1 -> valid package) ===
--- levels after attach (expect: 100 55 90 75 55 25) ---
hw.acpi.video.lcd0.levels: 100 55 90 75 55 25
hw.acpi.video.lcd0.fullpower: 100
=== 2. active read #1 (_DCS #1, no notify) ===
hw.acpi.video.lcd0.active: 1
=== 3. active read #2 (_DCS #2 -> Notify(VGT0,0x81) REPROBE -> rebind -> _BCL #2 FAILS) ===
hw.acpi.video.lcd0.active: 1
--- levels after reprobe (expect: EMPTY = numlevels 0, pointer dangling) ---
acpi_video0: <ACPI video extension> on vgapci0
evaluation of \_SB_.PCI0.VGT0.LCD0._BCL makes no sense
=== 4. UAF read: write fullpower=-1 -> presets handler reads freed vo_levels[0] ===
sysctl: hw.acpi.video.lcd0.fullpower=-1: Operation not supported by device
sysctl: hw.acpi.video.lcd0.fullpower=-1: Operation not supported by device
sysctl: hw.acpi.video.lcd0.fullpower=-1: Operation not supported by device
=== done ===
=== NOW kldunload on PATCHED kernel (baseline panicked here) ===
UNLOAD-RC=0
acpi_video0: <ACPI video extension> on vgapci0
evaluation of \_SB_.PCI0.VGT0.LCD0._BCL makes no sense
acpi_video0: detached
sysctl: unknown oid 'hw.acpi.video'
 7:31PM  up 29 secs, 0 users, load averages: 0.16, 0.04, 0.02