diff options
| -rw-r--r-- | arch/s390/kvm/interrupt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 18932a65ca68..1a702e8ef574 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -2724,6 +2724,9 @@ static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) bit = bit_nr + (addr % PAGE_SIZE) * 8; + /* kvm_set_routing_entry() should never allow this to happen */ + WARN_ON_ONCE(bit > (PAGE_SIZE * BITS_PER_BYTE - 1)); + return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; } @@ -2852,6 +2855,7 @@ int kvm_set_routing_entry(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e, const struct kvm_irq_routing_entry *ue) { + const struct kvm_irq_routing_s390_adapter *adapter; u64 uaddr_s, uaddr_i; int idx; @@ -2862,6 +2866,14 @@ int kvm_set_routing_entry(struct kvm *kvm, return -EINVAL; e->set = set_adapter_int; + adapter = &ue->u.adapter; + if (adapter->summary_addr + (adapter->summary_offset / 8) >= + (adapter->summary_addr & PAGE_MASK) + PAGE_SIZE) + return -EINVAL; + if (adapter->ind_addr + (adapter->ind_offset / 8) >= + (adapter->ind_addr & PAGE_MASK) + PAGE_SIZE) + return -EINVAL; + idx = srcu_read_lock(&kvm->srcu); uaddr_s = gpa_to_hva(kvm, ue->u.adapter.summary_addr); uaddr_i = gpa_to_hva(kvm, ue->u.adapter.ind_addr); |