1. 15 Aug, 2018 1 commit
    • Paul Mackerras's avatar
      KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() · c066fafc
      Paul Mackerras authored
      Since commit e641a317 ("KVM: PPC: Book3S HV: Unify dirty page map
      between HPT and radix", 2017-10-26), kvm_unmap_radix() computes the
      number of PAGE_SIZEd pages being unmapped and passes it to
      kvmppc_update_dirty_map(), which expects to be passed the page size
      instead.  Consequently it will only mark one system page dirty even
      when a large page (for example a THP page) is being unmapped.  The
      consequence of this is that part of the THP page might not get copied
      during live migration, resulting in memory corruption for the guest.
      
      This fixes it by computing and passing the page size in kvm_unmap_radix().
      
      Cc: stable@vger.kernel.org # v4.15+
      Fixes: e641a317 (KVM: PPC: Book3S HV: Unify dirty page map between HPT and radix)
      Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
      c066fafc
  2. 06 Aug, 2018 39 commits