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KVM: MMU: Reset mmu->pkru_mask to avoid stale data
When updating mmu->pkru_mask, the value can only be added but it isn't
reset in advance. This will make mmu->pkru_mask keep the stale data.
Fix this issue.
Fixes: 2d344105f5
("KVM, pkeys: introduce pkru_mask to cache conditions")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20211021071022.1140-1-chenyi.qiang@intel.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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parent
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@ -4596,10 +4596,10 @@ static void update_pkru_bitmask(struct kvm_mmu *mmu)
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unsigned bit;
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bool wp;
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if (!is_cr4_pke(mmu)) {
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mmu->pkru_mask = 0;
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mmu->pkru_mask = 0;
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if (!is_cr4_pke(mmu))
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return;
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}
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wp = is_cr0_wp(mmu);
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