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62 lines
2.0 KiB
62 lines
2.0 KiB
7 months ago
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/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fuzzer/FuzzedDataProvider.h>
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#include "osi/include/array.h"
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// Capping the element size at sizeof(uint32_t)+1
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// because it looks like there's a buffer overread
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#define MAX_ELEMENT_SIZE sizeof(uint32_t)
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#define MAX_ARRAY_LEN 1024
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size) {
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// Init our wrapper
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FuzzedDataProvider dataProvider(Data, Size);
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// Attempt to init an array
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size_t element_size =
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dataProvider.ConsumeIntegralInRange<size_t>(1, MAX_ELEMENT_SIZE);
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array_t* arr = array_new(element_size);
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// Functions can only be called on a non-null array_t, according to the .h
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if (arr != nullptr) {
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// How large do we want our array?
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size_t arr_len =
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dataProvider.ConsumeIntegralInRange<size_t>(0, MAX_ARRAY_LEN);
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if (arr_len > 0) {
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for (size_t i = 0; i < arr_len; i++) {
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uint32_t new_val = dataProvider.ConsumeIntegral<uint32_t>();
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// append_value() just derefs and calls append_ptr(),
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// so no need to fuzz separately
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array_append_value(arr, new_val);
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}
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// Pull the ptr to an element in the array
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size_t get_index =
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dataProvider.ConsumeIntegralInRange<size_t>(0, array_length(arr) - 1);
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array_at(arr, get_index);
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// Grab the array pointer
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array_ptr(arr);
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}
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}
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// Free the array (this can be performed on a nullptr)
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array_free(arr);
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return 0;
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}
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