[PATCH v2 0/3] KVM: SVM: Fix a (very) unlikely UAF for GA Log IRQs

[Sean Christopherson <seanjc@google.com>]

Fix a potential UAF due to freeing vCPUs while they're still reachable through
the global hashed list used to handle GA Log notifications.

v2:
 - Defer adding the VM to the GA Log list until a vCPU is created (KVM only
   needs GA Lot notifications to wake blocking vCPUs), so that removing the
   VM from the list can be done during pre-destroy without having to handle
   the scenario where VM creation fails at a later stage. [Sashiko, Xiao]
 - Drop the stable@ tag, as it's not clear to me that the bug can actually
   occur in the wild, whereas the changes themselves are somewhat risky.

v1: https://lore.kernel.org/all/20260625220933.3357733-1-seanjc@google.com

Sean Christopherson (3):
  KVM: SVM: Make kvm_x86_ops.vcpu_precreate() hook fully AVIC specific
  KVM: SVM: Do all per-VM AVIC initialization during vCPU precreation
    phase
  KVM: SVM: Remove VM from the GA Log notifier list before VM
    destruction

 arch/x86/kvm/svm/avic.c | 96 +++++++++++++++++++++++++++--------------
 arch/x86/kvm/svm/svm.c  | 16 ++-----
 arch/x86/kvm/svm/svm.h  |  3 +-
 3 files changed, 69 insertions(+), 46 deletions(-)


base-commit: a204badd8432f93b7e862e7dac6db0fe3d65f370
-- 
2.55.0.rc0.799.gd6f94ed593-goog