[GIT PULL] KVM: x86: guest_memfd changes for 7.2

[Sean Christopherson <seanjc@google.com>]

Fix a few bugs found by AI (mostly by Sashiko pointing out pre-existing bugs).

The following changes since commit b7fbe9a1bf9ee6c967ef77d366ca58c35fcf1887:

  Merge branch 'kvm-apx-prepare' into HEAD (2026-05-13 12:38:31 -0400)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-gmem-7.2

for you to fetch changes up to 48dbe473219832788c3940c84faa7f1df4375d5d:

  KVM: guest_memfd: fix NUMA interleave index double-counting (2026-06-08 09:15:43 -0700)

----------------------------------------------------------------
KVM guest_memfd changes for 7.2

 - Return -EEXIST instead of -EINVAL if userspace attempts to bind a gmem
   range to multiple memslots, and fix the test that was supposed to ensure
   KVM returns -EEXIST.

 - Treat memslot binding offsets and sizes as unsigned values to fix a bug
   where KVM interprets a large "offset + size" as a negative value and allows
   a nonsensical offset.

 - Use the inode number instead of the page offset for the NUMA interleaving
   index to fix a bug where the effective index would jump by two for
   consecutive pages (the caller also adds in the page offset).

----------------------------------------------------------------
Michael S. Tsirkin (1):
      KVM: guest_memfd: fix NUMA interleave index double-counting

Sean Christopherson (4):
      KVM: selftests: Remove unnecessary "%s" formatting of a constant string
      KVM: guest_memfd: Treat memslot binding offset+size as unsigned values
      KVM: selftests: Expand the guest_memfd test macros to allow passing the VM
      KVM: selftests: Add guest_memfd regression test signed offset+size bug

Zongyao Chen (2):
      KVM: guest_memfd: Return -EEXIST for overlapping bindings
      KVM: selftests: Test guest_memfd binding overlap without GPA overlap

 tools/testing/selftests/kvm/guest_memfd_test.c     | 24 +++++++++++++++--
 .../testing/selftests/kvm/set_memory_region_test.c | 31 +++++++++++++++++++---
 virt/kvm/guest_memfd.c                             | 16 ++++++-----
 virt/kvm/kvm_mm.h                                  |  7 +++--
 4 files changed, 63 insertions(+), 15 deletions(-)