[PATCH 0/2] KVM: arm64: Fix splat/misbehavior for MMIO SEA injection

[Oliver Upton <oliver.upton@linux.dev>]

syzkaller continues to find more interesting bugs, this time due to a
decently-sized hole in our UAPI.

Turns out we still go through the motions of completing MMIO emulation
even if userspace has pended a *synchronous* external abort in response
to an unexpected access. Oops!

In addition to the fix, I felt this warranted a selftest because a
documented UAPI flow has been broken for a while.

Marc, I'll probably take this in 6.13 since we've still got quite a bit
outstanding for 6.12 and this isn't *terribly* urgent.

Oliver Upton (2):
  KVM: arm64: Don't retire aborted MMIO instruction
  KVM: arm64: selftests: Add tests for MMIO external abort injection

 arch/arm64/include/asm/kvm_emulate.h          |  25 +++
 arch/arm64/kvm/mmio.c                         |   7 +-
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../selftests/kvm/aarch64/mmio_abort.c        | 158 ++++++++++++++++++
 4 files changed, 189 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/aarch64/mmio_abort.c


base-commit: 78a00555550042ed77b33ace7423aced228b3b4e
-- 
2.47.0.rc1.288.g06298d1525-goog