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| author | Nicholas Krause <xerofoify@gmail.com> | 2015-08-05 10:44:40 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-08-11 15:11:05 +0200 |
| commit | 603242a88ac44771442b077e0c9cb4d3af2b796f (patch) | |
| tree | b913214c14c5f7f4214c717132606201d4bcc3bb /arch/x86/kvm | |
| parent | f735d4af4b0ec3d87885710adf18b077480e7b19 (diff) | |
| download | linux-603242a88ac44771442b077e0c9cb4d3af2b796f.tar.bz2 | |
kvm: x86: Fix error handling in the function kvm_lapic_sync_from_vapic
This fixes error handling in the function kvm_lapic_sync_from_vapic
by checking if the call to kvm_read_guest_cached has returned a
error code to signal to its caller the call to this function has
failed and due to this we must immediately return to the caller
of kvm_lapic_sync_from_vapic to avoid incorrectly call apic_set_tpc
if a error has occurred here.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 2a5ca97c263b..9a3e342e3cda 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1900,8 +1900,9 @@ void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu) if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention)) return; - kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, - sizeof(u32)); + if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apic->vapic_cache, &data, + sizeof(u32))) + return; apic_set_tpr(vcpu->arch.apic, data & 0xff); } |