diff options
| author | Ben Gardon <bgardon@google.com> | 2021-03-15 16:38:01 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-16 14:15:24 -0400 |
| commit | 14f6fec2e8e04b83c87c339b8d8ff4cc62b23d35 (patch) | |
| tree | 1694fa85ad6c054e6197ed3eadeb285ab01b34ce | |
| parent | 70fb3e41a97a5fecc0aedc9a429479d702c3ab66 (diff) | |
| download | linux-stericsson-14f6fec2e8e04b83c87c339b8d8ff4cc62b23d35.tar.gz | |
KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs
Fix a missing rcu_dereference in tdp_mmu_zap_spte_atomic.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210315233803.2706477-3-bgardon@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index db2936cca4bfa7..946da74e069cf2 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -543,7 +543,7 @@ 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; } |