diff options
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 4438ecac9a89..ad59c22979bd 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1839,6 +1839,11 @@ static bool hv_is_vp_in_sparse_set(u32 vp_id, u64 valid_bank_mask, u64 sparse_ba int valid_bit_nr = vp_id / HV_VCPUS_PER_SPARSE_BANK; unsigned long sbank; + BUILD_BUG_ON(BITS_PER_TYPE(valid_bank_mask) != HV_MAX_SPARSE_VCPU_BANKS); + + if (valid_bit_nr >= HV_MAX_SPARSE_VCPU_BANKS) + return false; + if (!test_bit(valid_bit_nr, (unsigned long *)&valid_bank_mask)) return false; |