onnxruntime

2cdf0108 - Fix integer modulo by zero crash in CPU EP Mod operator (#27833)

Fix integer modulo by zero crash in CPU EP Mod operator (#27833) ### Description Add a pre-check for zero values in the divisor tensor for integral types in `Mod`. Returns an error `Status` instead of hitting undefined behavior (SIGFPE / structured exception). - **`element_wise_ops.cc`**: Added `CheckZeroDivisorImpl` as a single template struct in the `mod_internal` namespace using `if constexpr (std::is_integral<T>::value)` to guard the check — no-op for non-integer types. The struct's `operator()` returns `Status` (via `ORT_RETURN_IF`) and is dispatched with `InvokeRet<Status>`. When the divisor is a constant initializer, `TryGetConstantInput` validates for zeros once at kernel creation time in the out-of-line constructor (using `ORT_THROW_IF_ERROR`), avoiding per-`Compute` overhead. A `divisor_is_validated_constant_` flag tracks whether the one-time check was performed. In `Compute`, non-constant divisors are scanned via the type dispatcher (using `ORT_RETURN_IF_ERROR`) before calling `CallModImpl`, skipping the check when the constant was already validated. The Mod constructor is defined out-of-line after the `mod_internal` namespace to keep it contiguous. - **`element_wise_ops_test.cc`**: Added `Mod_int8_by_zero`, `Mod_int32_by_zero`, `Mod_int64_by_zero_scalar` tests covering tensor and scalar divisor cases, plus `Mod_int32_by_zero_constant_initializer` to exercise the `TryGetConstantInput` constructor path with `is_initializer = true`. ### Motivation and Context Integer modulo by zero is UB in C++ and causes a hardware exception that crashes the process. Float types produce NaN naturally via `std::fmod`, but int8/int16/int32/int64/uint* types do not. This is the same class of issue that was fixed for the `Div` operator in #27693, now applied to the `Mod` operator. <!-- START COPILOT CODING AGENT TIPS --> --- 💬 Send tasks to Copilot coding agent from [Slack](https://gh.io/cca-slack-docs) and [Teams](https://gh.io/cca-teams-docs) to turn conversations into code. Copilot posts an update in your thread when it's finished. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: edgchen1 <18449977+edgchen1@users.noreply.github.com>