KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page

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The pt passed into handle_removed_tdp_mmu_page does not need RCU
protection, as it is not at any risk of being freed by another thread at
that point. However, the implicit cast from tdp_sptep_t to u64 * dropped
the __rcu annotation without a proper rcu_derefrence. Fix this by
passing the pt as a tdp_ptep_t and then rcu_dereferencing it in
the function.

Suggested-by: Sean Christopherson <seanjc@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210315233803.2706477-2-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Ben Gardon 2021-03-15 16:38:00 -07:00 • committed by Paolo Bonzini

parent 1e28eed176

commit 70fb3e41a9

1 changed files with 8 additions and 3 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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