* apiserver: fixes handling and logging of panics in REST handlers to prevent crashes ([#71076](https://github.com/kubernetes/kubernetes/pull/71076), [@liggitt](https://github.com/liggitt))

- Kubeadm: Added missing cluster-info context validation to prevent panics when the user has a malformed kubeconfig in the cluster-info ConfigMap that excludes a valid current context. ([#134715](https://github.com/kubernetes/kubernetes/pull/134715), [@neolit123](https://github.com/neolit123))

		errFatal(handler.Register(manager, func(ctx context.Context, pp *testRequest, in <-chan *testRequest, out chan<- *testResponse) *RemoteErr {
			n := 0
			for i := range in {
				if n > payloads {
					panic("too many requests")
				}

				// t.Log("Got request:", *i)
				out <- &testResponse{
					OrgNum:    i.Num + pp.Num,
					OrgString: pp.String + i.String,
					Embedded:  *i,
				}
				n++
			}

written to dst. // // If dst does not have length at least n, // XORBytes panics without writing anything to dst. // // dst and x or y may overlap exactly or not at all, // otherwise XORBytes may panic. func XORBytes(dst, x, y []byte) int { n := min(len(x), len(y)) if n == 0 { return 0 } if n > len(dst) { panic("subtle.XORBytes: dst too short") } if alias.InexactOverlap(dst[:n], x[:n]) || alias.InexactOverlap(dst[:n], y[:n]) { panic("subtle.XORBytes: invalid overlap") } xorBytes(&dst[0], &x[0], &y[0],...

// https://www.awsarchitectureblog.com/2015/03/backoff.html
func exponentialBackoffWait(r *rand.Rand, unit, maxSleep time.Duration) func(uint) time.Duration {
	if unit > time.Hour {
		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(attempt uint) time.Duration {
		if attempt > 16 {
			// Protect against integer overflow
			attempt = 16
		}

### Bug or Regression

- EndpointSlice Mirroring controller now cleans up managed EndpointSlices when a Service selector is added (#106136, @robscott) [SIG Apps, Network and Testing]
- Fix concurrent map access causing panics when logging timed-out API calls. (#106124, @marseel) [SIG API Machinery]
- Support more than 100 disk mounts on Windows (#105673, @andyzhangx) [SIG Storage and Windows]

## Dependencies

### Added

* Fix issue with PodDisruptionBudgets in which `minAvailable` specified as a percentage did not work with StatefulSet Pods. ([#39454](https://github.com/kubernetes/kubernetes/pull/39454), [@foxish](https://github.com/foxish))
* Fix panic in vSphere cloud provider ([#38423](https://github.com/kubernetes/kubernetes/pull/38423), [@BaluDontu](https://github.com/BaluDontu))

If <code>list</code> pointed to a cyclic list,
then the original program would never access <code>*p</code> or <code>*q</code>,
but the rewritten program would.
(Moving `*p` ahead would be safe if the compiler can prove `*p` will not panic;
moving `*q` ahead would also require the compiler proving that no other
goroutine can access `*q`.)
</p>

<p>
Not introducing data races also means not assuming that called functions

- Fix a bug that `--disabled-metrics` doesn't function well. (#105793, @Huang-Wei) [SIG API Machinery, Cluster Lifecycle and Instrumentation]
- Fix a panic in kubectl when creating secrets with an improper output type (#106356, @lauchokyip) [SIG CLI]
- Fix concurrent map access causing panics when logging timed-out API calls. (#106112, @marseel) [SIG API Machinery]

* Add aggregator_unavailable_apiservice_{count,gauge} metrics in the kube-aggregator. ([#71380](https://github.com/kubernetes/kubernetes/pull/71380), [@sttts](https://github.com/sttts))
* Fixes apiserver nil pointer panics when requesting v2beta1 autoscaling object metrics ([#71744](https://github.com/kubernetes/kubernetes/pull/71744), [@yue9944882](https://github.com/yue9944882))