Fix type length error since pmu->fixed_ctr_ctrl is u64 but the local
variable old_fixed_ctr_ctrl is u8. Truncating the value leads to
information loss at runtime. This leads to incorrect value in old_ctrl
retrieved from each field of old_fixed_ctr_ctrl and causes incorrect code
execution within the for loop of reprogram_fixed_counters(). So fix this
type to u64.
Fixes: 76d287b2342e ("KVM: x86/pmu: Drop "u8 ctrl, int idx" for reprogram_fixed_counter()")
Signed-off-by: Mingwei Zhang <mizhang@xxxxxxxxxx>
---
arch/x86/kvm/vmx/pmu_intel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
index a6216c874729..315c7c2ba89b 100644
--- a/arch/x86/kvm/vmx/pmu_intel.c
+++ b/arch/x86/kvm/vmx/pmu_intel.c
@@ -71,7 +71,7 @@ static int fixed_pmc_events[] = {
static void reprogram_fixed_counters(struct kvm_pmu *pmu, u64 data)
{
struct kvm_pmc *pmc;
- u8 old_fixed_ctr_ctrl = pmu->fixed_ctr_ctrl;
+ u64 old_fixed_ctr_ctrl = pmu->fixed_ctr_ctrl;
int i;
pmu->fixed_ctr_ctrl = data;
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
--
2.43.0.429.g432eaa2c6b-goog
