Report a possible bug related to address validation

[AuYang261]

I think there might be a bug in tensor_data_app_native function in core/iwasm/libraries/wasi-nn/src/utils/wasi_nn_app_native.c file: the last parameter passed to wasm_runtime_validate_app_addr should be total_elements * size of each element, which depending on input_tensor_wasm->type.

Because the parameter total_elements is the number of the elements in array pointed by input_tensor_wasm->data_offset, while the length of the array in bytes should be the number of elements * size of each element.

I wonder if my understanding is wrong. Thanks.

[wenyongh]

@tonibofarull I am not sure whether it is a bug, could you help look into it? Thanks a lot.

[tonibofarull]

You are right, in fact, currently the only input and output tensor datatype that supports is fp32.
Will fix this and return an error if the datatype is wrong. Thanks for reporting!

[yamt]

i don't think we should calculate tensor size by ourselves.
cf. #4352