| Message ID | 20210311231658.1243953-4-bgardon@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix RCU warnings in TDP MMU | expand |
On Thu, Mar 11, 2021, Ben Gardon wrote: > Fix a missing rcu_dereference in tdp_mmu_zap_spte_atomic. > > Reported-by: kernel test robot <lkp@xxxxxxxxx> s/xxxxxxxxx/intel.com Reviewed-by: Sean Christopherson <seanjc@google.com> > Signed-off-by: Ben Gardon <bgardon@google.com>
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; }
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(-)