KVM/arm64 fixes for 5.14, take #2

- Plug race between enabling MTE and creating vcpus
 - Fix off-by-one bug when checking whether an address range is RAM
 -----BEGIN PGP SIGNATURE-----
 
 iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmEWEsoPHG1hekBrZXJu
 ZWwub3JnAAoJECPQ0LrRPXpD1IIQAIbZdNAIy68j2/H8sgaYT4GuYICLOvz3WhTI
 Li/yRP2b0th4wT4LaKlATKJKQgliPxXZ0KCJMZxFr7aiKEyY1LZe+ddJBzetzgy2
 S12v5V3cp/0DHQ6CEflUy0x8gM/BeudeYyZcHxSbLZcVB4bzFx9pBJeJ1WkLG+GC
 Bx4zxdARNas+9zOUuHLCQbWfihMSrbj3CI6WIafpNeFOs3lLldT8WcRofgQfAsAx
 V3FKETIOb5NUU6LKUHkYgyM3n1MZwAukaCsepDhayeeT5iEyIGXb1HkjcYOx6bfn
 BhDvA7PH9oXBOFFL2sxlJKamXWZP3Bz7xyZ40MXDqC1lSMAUEh8TXJFptncEDxPb
 OgXewTgCulKVSjT8YXnoTe1UNQ2dLqjw1TsqV5jXhVXIjeBcR8S4gM0hcqwvgWlO
 BHaDt8BPd39rBzfC0gUkE5BHE04QuboK/Vz/+Qc6Slc3EUIdnuCtjefdRLvSxxgB
 bEBW+s3zcZ7RhoSLvXgvTe3an11Os8BH921VCxgMyEnIvSDEbw3KypmPYuNCkSLc
 t9GLAbPU139w7Gk7vp0oqhI8xIV7QoFk+b94JIHMvtS13yVaqBrZF33RrFzmAwVN
 lXDiOdoR8mqbX2EPQVIn+BhSlebfvnJANm46tzgY1/u2mUgH//fu/cH3kpjgohco
 kY+Ztnb9
 =hL2s
 -----END PGP SIGNATURE-----

Merge tag 'kvmarm-fixes-5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 5.14, take #2

- Plug race between enabling MTE and creating vcpus
- Fix off-by-one bug when checking whether an address range is RAM

arch/arm64/kvm/arm.c

@@ -94,10 +94,14 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
 		kvm->arch.return_nisv_io_abort_to_user = true;
 		break;
 	case KVM_CAP_ARM_MTE:
-		if (!system_supports_mte() || kvm->created_vcpus)
-			return -EINVAL;
-		r = 0;
-		kvm->arch.mte_enabled = true;
+		mutex_lock(&kvm->lock);
+		if (!system_supports_mte() || kvm->created_vcpus) {
+			r = -EINVAL;
+		} else {
+			r = 0;
+			kvm->arch.mte_enabled = true;
+		}
+		mutex_unlock(&kvm->lock);
 		break;
 	default:
 		r = -EINVAL;

arch/arm64/kvm/hyp/nvhe/mem_protect.c

@@ -193,7 +193,7 @@ static bool range_is_memory(u64 start, u64 end)
 {
 	struct kvm_mem_range r1, r2;
 
-	if (!find_mem_range(start, &r1) || !find_mem_range(end, &r2))
+	if (!find_mem_range(start, &r1) || !find_mem_range(end - 1, &r2))
 		return false;
 	if (r1.start != r2.start)
 		return false;