| // Copyright 2024 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "base/compiler_specific.h" |
| #include "base/containers/span.h" |
| #include "base/strings/string_view_util.h" |
| |
| // Tries to use a dangling pointer, triggers a UaF crash under ASAN. |
| NOINLINE int TriggerUAF() { |
| auto ptr = std::make_unique<int>(0); |
| int* dangling = ptr.get(); |
| ptr = nullptr; |
| return *dangling; |
| } |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| // SAFETY: libFuzzer and compatible fuzzing engines pass valid data. |
| auto bytes = UNSAFE_BUFFERS(base::span(data, size)); |
| auto str = base::as_string_view(bytes); |
| |
| if (str == "uaf") { |
| return TriggerUAF(); |
| } |
| return 0; |
| } |
