[v1] KVM: s390: Fix two bugs

[PATCH v1 0/2] KVM: s390: Fix two bugs

Claudio Imbrenda posted 2 patches 2 months ago

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arch/s390/kvm/kvm-s390.c |  8 ++++----
arch/s390/kvm/pv.c       | 14 +++++++++-----
2 files changed, 13 insertions(+), 9 deletions(-)

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[PATCH v1 0/2] KVM: s390: Fix two bugs

Posted by Claudio Imbrenda 2 months ago

This small series fixes two bugs in s390 KVM. One is small and trivial,
the other is pretty bad.

* The wrong type of flag was being passed to vcpu_dat_fault_handler();
  it expects a FOLL_* flag, but a FAULT_FLAG_* was passed instead.
* Due to incorrect usage of mmu_notifier_register(), in some rare cases
  when running a secure guest, the struct mm for the userspace process
  would get freed too early and cause a use-after-free.

Claudio Imbrenda (2):
  KVM: s390: Fix incorrect usage of mmu_notifier_register()
  KVM: s390: Fix FOLL_*/FAULT_FLAG_* confusion

 arch/s390/kvm/kvm-s390.c |  8 ++++----
 arch/s390/kvm/pv.c       | 14 +++++++++-----
 2 files changed, 13 insertions(+), 9 deletions(-)

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2.50.1