Update to go1.23.3

src/runtime/mprof.go

@@ -1136,11 +1136,12 @@ func expandFrames(p []BlockProfileRecord) {
 	for i := range p {
 		cf := CallersFrames(p[i].Stack())
 		j := 0
-		for ; j < len(expandedStack); j++ {
+		for j < len(expandedStack) {
 			f, more := cf.Next()
 			// f.PC is a "call PC", but later consumers will expect
 			// "return PCs"
 			expandedStack[j] = f.PC + 1
+			j++
 			if !more {
 				break
 			}
@@ -1270,7 +1271,8 @@ func pprof_mutexProfileInternal(p []profilerecord.BlockProfileRecord) (n int, ok
 // of calling ThreadCreateProfile directly.
 func ThreadCreateProfile(p []StackRecord) (n int, ok bool) {
 	return threadCreateProfileInternal(len(p), func(r profilerecord.StackRecord) {
-		copy(p[0].Stack0[:], r.Stack)
+		i := copy(p[0].Stack0[:], r.Stack)
+		clear(p[0].Stack0[i:])
 		p = p[1:]
 	})
 }
@@ -1649,7 +1651,8 @@ func GoroutineProfile(p []StackRecord) (n int, ok bool) {
 		return
 	}
 	for i, mr := range records[0:n] {
-		copy(p[i].Stack0[:], mr.Stack)
+		l := copy(p[i].Stack0[:], mr.Stack)
+		clear(p[i].Stack0[l:])
 	}
 	return
 }