RHEL5 i386 guests register non 32-byte aligned addresses: kvm-clock: cpu 1, msr 0:3018aa5, secondary cpu clock kvm-clock: cpu 2, msr 0:301f8e9, secondary cpu clock kvm-clock: cpu 3, msr 0:302672d, secondary cpu clock Check for an address+len that would cross page boundary instead. Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f19ac0a..ad36d386 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1952,8 +1952,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) gpa_offset = data & ~(PAGE_MASK | 1); - /* Check that the address is 32-byte aligned. */ - if (gpa_offset & (sizeof(struct pvclock_vcpu_time_info) - 1)) + /* Check that address+len does not cross page boundary */ + if ((gpa_offset + sizeof(struct pvclock_vcpu_time_info) - 1) + & PAGE_MASK) break; if (kvm_gfn_to_hva_cache_init(vcpu->kvm, -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
