Current devel kernel - possible security hole

Hi, Using kernel-2.6.12-1.1448_FC5 Is there any way to check a potential hole I unearthed last night? I need to know if it is Mono causing the problem or the kernel or some other component. I have a small mono application which uses threading. Somehow, I managed to run the application and kill the desktop, but was then able to access, as a standard user, and both read and write to anywhere on my hard drive. I can reproduce the problem with the same application, but not with same code using C or C++. Can anyone advise me on this? I don't know if it is the threading model used in mono (which I have a feeling is POSIX so that shouldn't make much of a difference), a FC component or the kernel. Source code is below - sorry about it being in C#. The code was deliberately written to chew system resources. TTFN Paul using System; using System.Threading; using System.Windows.Forms; using System.Drawing; public class Sharing1 : Form { private TextBox accessCountBox = new TextBox(); private Button start = new Button(); private Button watch = new Button(); private int accessCount = 0; public void incrementAccess() { accessCount++; accessCountBox.Text = accessCount.ToString(); } private int numCounters = 12; private int numWatchers = 15; private TwoCounter[] s; public Sharing1() { ClientSize = new Size(450, 480); Panel p = new Panel(); p.Size = new Size(400, 50); start.Click += new EventHandler(StartAllThreads); watch.Click += new EventHandler(StartAllWatchers); accessCountBox.Text = "0"; accessCountBox.Location = new Point(10, 10); start.Text = "Start threads"; start.Location = new Point(110, 10); watch.Text = "Begin watching"; watch.Location = new Point(210, 10); p.Controls.Add(start); p.Controls.Add(watch); p.Controls.Add(accessCountBox); s = new TwoCounter[numCounters]; for (int i = 0; i < s.Length; i++) { s[i] = new TwoCounter(new TwoCounter.IncrementAccess(incrementAccess)); s[i].Location = new Point(10, 50 + s[i].Height * i); Controls.Add(s[i]); } this.Closed += new EventHandler(StopAllThreads); Controls.Add(p); } public void StartAllThreads(object sender, EventArgs ea) { for (int i = 0; i < s.Length; i++) s[i].Start(); } public void StopAllThreads(object sender, EventArgs ea) { for (int i = 0; i < s.Length; i++) if (s[i] != null) s[i].Stop(); } public void StartAllWatchers(object sender, EventArgs ea) { for (int i = 0; i < numWatchers; i++) new Watcher(s); } public static void Main(string [] args) { Sharing1 app = new Sharing1(); if (args.Length > 0) { app.numCounters = SByte.Parse(args[0]); if (args.Length == 2) app.numCounters = SByte.Parse(args[1]); } Application.Run(app); } } class TwoCounter : Panel { private bool started = false; private Label t1; private Label t2; private Label lbl; private Thread t; private int count1 = 0, count2 = 0; public delegate void IncrementAccess(); IncrementAccess del; public TwoCounter(IncrementAccess del) { this.del = del; this.Size = new Size(350, 30); this.BorderStyle = BorderStyle.Fixed3D; t1 = new Label(); t1.Location = new Point(10, 10); t2 = new Label(); t2.Location = new Point(110, 10); lbl = new Label(); lbl.Location = new Point(210, 10); lbl.Text = "Count1 == Count2"; Controls.AddRange(new Control[] {t1, t2, lbl} ); t = new Thread(new ThreadStart(run)); } public void Start() { if (!started) { started = true; t.Start(); } } public void Stop() { t.Abort(); } public void run() { while(true) { t1.Text = (++count1).ToString(); t2.Text = (++count2).ToString(); Thread.Sleep(500); } } public void synchTest() { del(); if (count1 != count2) lbl.Text = "Unsynched"; } } class Watcher { TwoCounter[] s; public Watcher(TwoCounter[] s) { this.s = s; new Thread(new ThreadStart(run)).Start(); } public void run() { while(true) { for(int i = 0; i < s.Length; i++) s[i].synchTest(); Thread.Sleep(500); } } } -- "Some people will do anything for a woman in uniform" - The Doctor - Unregenerate (Big Finish audio)