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| author |   Colin Ian King <colin.king@canonical.com> | 2021-06-22 16:09:12 +0100 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-06-24 04:31:16 -0400 |
| commit | 31c656570065727028f96c811b5ea9fc61502a18 (patch) | |
| tree | ff0308af6fe3463aae89bbf65188f6062a0374dd /arch/x86/kvm/mmu/mmu.c | |
| parent | KVM: selftests: fix triple fault if ept=0 in dirty_log_test (diff) | |
| download | linux-dev-31c656570065727028f96c811b5ea9fc61502a18.tar.xz linux-dev-31c656570065727028f96c811b5ea9fc61502a18.zip | |
KVM: x86/mmu: Fix uninitialized boolean variable flush
In the case where kvm_memslots_have_rmaps(kvm) is false the boolean
variable flush is not set and is uninitialized. If is_tdp_mmu_enabled(kvm)
is true then the call to kvm_tdp_mmu_zap_collapsible_sptes passes the
uninitialized value of flush into the call. Fix this by initializing
flush to false.
Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: e2209710ccc5 ("KVM: x86/mmu: Skip rmap operations if rmaps not allocated")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622150912.23429-1-colin.king@canonical.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 84d48a33e38b..b3be690d081a 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5689,7 +5689,7 @@ void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm, { /* FIXME: const-ify all uses of struct kvm_memory_slot. */ struct kvm_memory_slot *slot = (struct kvm_memory_slot *)memslot; - bool flush; + bool flush = false; if (kvm_memslots_have_rmaps(kvm)) { write_lock(&kvm->mmu_lock); |