vfio/pci: Release the VGA arbiter client on register_device() failure

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The re-order in the Fixes commit below displaced vfio_pci_vga_init() as
the last failure point of what is now vfio_pci_core_register_device()
without introducing an unwind for the VGA arbiter registration.

In current kernels this is mostly benign because vfio_pci_set_decode()
only uses pci_dev state, but the original failure path could leave a
callback with a freed vdev cookie.  The stale registration also becomes
unsafe again once the callback follows drvdata to the vfio device.

Add the required VGA unwind callout.

Fixes: 4aeec3984d ("vfio/pci: Re-order vfio_pci_probe()")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20260615191241.688297-3-alex.williamson@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

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Alex Williamson 2026-06-15 13:12:30 -06:00 • committed by Alex Williamson

parent 4575e9aac5

commit daedde7f02

1 changed files with 1 additions and 0 deletions

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drivers/vfio/pci/vfio_pci_core.c

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