Messages in this thread Patch in this message | | | Date | Thu, 11 Mar 2021 15:16:57 -0800 | Subject | [PATCH 3/4] KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs | From | Ben Gardon <> |
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Fix a missing rcu_dereference in tdp_mmu_zap_spte_atomic.
Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Ben Gardon <bgardon@google.com> --- arch/x86/kvm/mmu/tdp_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 6c8824bcc2f2..a8fdccf4fd06 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -532,7 +532,7 @@ static inline bool tdp_mmu_zap_spte_atomic(struct kvm *kvm, * here since the SPTE is going from non-present * to non-present. */ - WRITE_ONCE(*iter->sptep, 0); + WRITE_ONCE(*rcu_dereference(iter->sptep), 0); return true; } -- 2.31.0.rc2.261.g7f71774620-goog
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