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freebsd / drm-kmod

drm driver for FreeBSD
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Crash when using kqueue (via epoll-shim) on DMABUF handle #271

Open jbeich opened 10 months ago

jbeich commented 10 months ago

Describe the bug After gamescope started using epoll FreeBSD kernel crashes.

FreeBSD version

$ uname -aKU
FreeBSD example.tld 15.0-CURRENT #0 main-n266825-59cf3436dce3: Wed Dec  6 07:38:33 UTC 2023 foo@example.tld:/usr/obj/usr/src/amd64.amd64/sys/MYKERNEL amd64 1500005 1500005

PCI Info

pciconf -lv ``` $ pciconf -lv | fgrep -A4 vga vgapci1@pci0:0:2:0: class=0x030000 rev=0x06 hdr=0x00 vendor=0x8086 device=0x1912 subvendor=0x1462 subdevice=0x7968 vendor = 'Intel Corporation' device = 'HD Graphics 530' class = display subclass = VGA ```

DRM KMOD version

$ pkg query -x '%n %v' 'drm.*kmod'
drm-515-kmod-5.15.118_2

To Reproduce

  1. Ensure GPU supports Vulkan (required by gamescope)
  2. Apply pending gamescope 3.13.17 update
  3. Install gamescope and vulkan-tools
  4. Run env INTEL_DEBUG=norbc gamescope -- vkcube-xcb
  5. Kernel panic

Screenshots I can't provide a backtrace as DDB fails to save and reboot for some reason