fix: validate event pool count

Related-To: GSD-13399
Signed-off-by: Krzysztof Gibala <krzysztof.gibala@intel.com>
Source: 0d1f386

Author: kgibala

level_zero/core/source/event/event.cpp

@@ -40,6 +40,10 @@ template Event *Event::create<uint64_t>(const EventDescriptor &, Device *, ze_re
 template Event *Event::create<uint32_t>(const EventDescriptor &, Device *, ze_result_t &);
 
 ze_result_t EventPool::initialize(DriverHandle *driver, Context *context, uint32_t numDevices, ze_device_handle_t *deviceHandles) {
+    if (this->numEvents == 0) {
+        return ZE_RESULT_ERROR_INVALID_SIZE;
+    }
+
     this->context = context;
 
     const bool counterBased = (counterBasedFlags != 0);

level_zero/core/test/unit_tests/sources/event/test_event.cpp

@@ -223,6 +223,19 @@ TEST_F(EventPoolFailTests, givenEnabledTimestampPoolAllocatorWhenCreatingEventPo
     EXPECT_EQ(res, ZE_RESULT_ERROR_OUT_OF_DEVICE_MEMORY);
 }
 
+TEST_F(EventPoolCreate, givenZeroEventCountWhenCreatingEventPoolThenInvalidSizeIsReturned) {
+    ze_event_pool_desc_t eventPoolDesc = {
+        ZE_STRUCTURE_TYPE_EVENT_POOL_DESC,
+        nullptr,
+        0,
+        0};
+
+    ze_result_t result = ZE_RESULT_SUCCESS;
+    std::unique_ptr<L0::EventPool> eventPool(EventPool::create(driverHandle.get(), context, 0, nullptr, &eventPoolDesc, result));
+    EXPECT_EQ(ZE_RESULT_ERROR_INVALID_SIZE, result);
+    EXPECT_EQ(nullptr, eventPool);
+}
+
 TEST_F(EventPoolCreate, GivenEventPoolThenAllocationContainsAtLeast16Bytes) {
     ze_event_pool_desc_t eventPoolDesc = {
         ZE_STRUCTURE_TYPE_EVENT_POOL_DESC,