fix: lock crash report ring buffer (SMP race) and guard crashpad crash loop

kernel/src/Sched/Scheduler.cpp

@@ -10,6 +10,7 @@
 #include <Memory/Paging.hpp>
 #include <Memory/HHDM.hpp>
 #include <Libraries/Memory.hpp>
+#include <Libraries/String.hpp>
 #include <Terminal/Terminal.hpp>
 #include <CppLib/Stream.hpp>
 #include <CppLib/Spinlock.hpp>
@@ -1399,6 +1400,17 @@ namespace Sched {
         // handle to that same out-stream so it can surface a textual crash
         // report to the console user when no desktop is running.
         Process* crasher     = GetProcessByPid(crasherPid);
+
+        // Crash-loop guard: never spawn a crashpad to report on the crashpad
+        // itself. If crashpad.elf faults (startup bug, OOM, etc.) we would
+        // otherwise spawn another crashpad, which can fault again, ad infinitum
+        // -- a fork bomb that also exhausts process slots and report buffers.
+        if (crasher && Lib::strcmp(crasher->name, crashpadPath) == 0) {
+            Kt::KernelLogStream(Kt::ERROR, "Sched")
+                << "crashpad faulted; not spawning a nested crashpad";
+            return -1;
+        }
+
         int      crasherSlot = Ipc::SlotForPid(crasherPid);
         bool     inheritRedir = crasher && crasher->redirected &&
                                 crasher->ioOutHandle >= 0 && crasherSlot >= 0;