* Elliot Berman <quic_eberman@xxxxxxxxxxx> [2023-02-14 13:24:16]:
> +int gh_vm_mem_alloc(struct gh_vm *ghvm, struct gh_userspace_memory_region *region)
> +{
> + struct gh_vm_mem *mapping, *tmp_mapping;
> + struct gh_rm_mem_entry *mem_entries;
> + phys_addr_t curr_page, prev_page;
> + struct gh_rm_mem_parcel *parcel;
> + int i, j, pinned, ret = 0;
> + size_t entry_size;
> + u16 vmid;
> +
> + if (!gh_api_has_feature(GH_API_FEATURE_MEMEXTENT))
> + return -EOPNOTSUPP;
> +
> + if (!region->memory_size || !PAGE_ALIGNED(region->memory_size) ||
> + !PAGE_ALIGNED(region->userspace_addr) || !PAGE_ALIGNED(region->guest_phys_addr))
> + return -EINVAL;
Check for wraps also:
region->guest_phys_addr + region->memory_size > region->guest_phys_addr
