[GIT PULL] VFIO fixes for v7.1-rc4

[Alex Williamson <alex@shazbot.org>]

Hi Linus,

Please include for rc4.  Thanks!

The following changes since commit 5d6919055dec134de3c40167a490f33c74c12581:

  Linux 7.1-rc3 (2026-05-10 14:08:09 -0700)

are available in the Git repository at:

  https://github.com/awilliam/linux-vfio.git tags/vfio-v7.1-rc4

for you to fetch changes up to 702809dabdecca807bdd50cfdcc1c980feb2ba62:

  vfio/pci: Check BAR resources before exporting a DMABUF (2026-05-14 11:39:03 -0600)

----------------------------------------------------------------
VFIO fixes for v7.1-rc4

 - Convert vfio-pci BAR resource requests and iomaps initialization
   from a lazy, on-demand model to an eager pre-allocation model to
   avoid races while preserving legacy error behavior.  Fix unchecked
   barmap access in dma-buf export path. (Matt Evans)

 - Introduce an implicit unsigned cast in converting vfio-pci device
   offsets to region indexes, closing a potential out-of-bounds
   access through the vfio_pci_ioeventfd() interface. (Matt Evans)

 - Fix a dma-buf kref underflow and stuck wait_for_completion() when
   closing a previously revoked dma-buf. (Alex Williamson)

----------------------------------------------------------------
Alex Williamson (1):
      vfio/pci: fix dma-buf kref underflow after revoke

Matt Evans (3):
      vfio/pci: Make VFIO_PCI_OFFSET_TO_INDEX() return unsigned
      vfio/pci: Set up BAR resources and maps in vfio_pci_core_enable()
      vfio/pci: Check BAR resources before exporting a DMABUF

 drivers/vfio/pci/vfio_pci_core.c   | 37 ++++++++++++++++++++++++++++++++-
 drivers/vfio/pci/vfio_pci_dmabuf.c | 42 ++++++++++++++++++++------------------
 drivers/vfio/pci/vfio_pci_rdwr.c   | 26 +++++++----------------
 include/linux/vfio_pci_core.h      |  2 +-
 4 files changed, 66 insertions(+), 41 deletions(-)