mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 06:52:45 +00:00
21d5f4ada1
This was supposed to be the foundation for some kind of pre-kernel environment, but nobody is working on it right now, so let's move everything back into the kernel and remove all the confusion.
359 lines
14 KiB
C++
359 lines
14 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2019-2020, Shannon Booth <shannon.ml.booth@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Function.h>
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#include <AK/String.h>
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#include <Kernel/Syscall.h>
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#include <Kernel/IO.h>
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#include <LibCore/ArgsParser.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#pragma GCC optimize("O0")
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class Crash {
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public:
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enum class RunType {
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UsingChildProcess,
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UsingCurrentProcess,
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};
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enum class Failure {
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DidNotCrash,
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UnexpectedError,
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};
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Crash(String test_type, Function<Crash::Failure()> crash_function)
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: m_type(test_type)
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, m_crash_function(move(crash_function))
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{
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}
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void run(RunType run_type)
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{
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printf("\x1B[33mTesting\x1B[0m: \"%s\"\n", m_type.characters());
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auto run_crash_and_print_if_error = [this]() {
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auto failure = m_crash_function();
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// If we got here something went wrong
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printf("\x1B[31mFAIL\x1B[0m: ");
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switch (failure) {
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case Failure::DidNotCrash:
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printf("Did not crash!\n");
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break;
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case Failure::UnexpectedError:
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printf("Unexpected error!\n");
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break;
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default:
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ASSERT_NOT_REACHED();
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}
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};
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if (run_type == RunType::UsingCurrentProcess) {
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run_crash_and_print_if_error();
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} else {
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// Run the test in a child process so that we do not crash the crash program :^)
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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ASSERT_NOT_REACHED();
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} else if (pid == 0) {
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run_crash_and_print_if_error();
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exit(0);
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}
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int status;
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waitpid(pid, &status, 0);
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if (WIFSIGNALED(status))
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printf("\x1B[32mPASS\x1B[0m: Terminated with signal %d\n", WTERMSIG(status));
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}
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}
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private:
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String m_type;
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Function<Crash::Failure()> m_crash_function;
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};
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int main(int argc, char** argv)
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{
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bool do_all_crash_types = false;
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bool do_segmentation_violation = false;
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bool do_division_by_zero = false;
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bool do_illegal_instruction = false;
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bool do_abort = false;
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bool do_write_to_uninitialized_malloc_memory = false;
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bool do_write_to_freed_memory = false;
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bool do_write_to_read_only_memory = false;
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bool do_read_from_uninitialized_malloc_memory = false;
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bool do_read_from_freed_memory = false;
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bool do_invalid_stack_pointer_on_syscall = false;
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bool do_invalid_stack_pointer_on_page_fault = false;
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bool do_syscall_from_writeable_memory = false;
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bool do_write_to_freed_memory_still_cached_by_malloc = false;
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bool do_read_from_freed_memory_still_cached_by_malloc = false;
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bool do_execute_non_executable_memory = false;
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bool do_trigger_user_mode_instruction_prevention = false;
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bool do_use_io_instruction = false;
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bool do_read_cpu_counter = false;
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auto args_parser = Core::ArgsParser();
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args_parser.add_option(do_all_crash_types, "Test that all of the following crash types crash as expected", nullptr, 'A');
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args_parser.add_option(do_segmentation_violation, "Perform a segmentation violation by dereferencing an invalid pointer", nullptr, 's');
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args_parser.add_option(do_division_by_zero, "Perform a division by zero", nullptr, 'd');
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args_parser.add_option(do_illegal_instruction, "Execute an illegal CPU instruction", nullptr, 'i');
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args_parser.add_option(do_abort, "Call `abort()`", nullptr, 'a');
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args_parser.add_option(do_read_from_uninitialized_malloc_memory, "Read a pointer from uninitialized malloc memory, then read from it", nullptr, 'm');
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args_parser.add_option(do_read_from_freed_memory, "Read a pointer from memory freed using `free()`, then read from it", nullptr, 'f');
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args_parser.add_option(do_write_to_uninitialized_malloc_memory, "Read a pointer from uninitialized malloc memory, then write to it", nullptr, 'M');
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args_parser.add_option(do_write_to_freed_memory, "Read a pointer from memory freed using `free()`, then write to it", nullptr, 'F');
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args_parser.add_option(do_write_to_read_only_memory, "Write to read-only memory", nullptr, 'r');
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args_parser.add_option(do_invalid_stack_pointer_on_syscall, "Make a syscall while using an invalid stack pointer", nullptr, 'T');
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args_parser.add_option(do_invalid_stack_pointer_on_page_fault, "Trigger a page fault while using an invalid stack pointer", nullptr, 't');
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args_parser.add_option(do_syscall_from_writeable_memory, "Make a syscall from writeable memory", nullptr, 'S');
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args_parser.add_option(do_write_to_freed_memory_still_cached_by_malloc, "Read from recently freed memory (tests an opportunistic malloc guard)", nullptr, 'x');
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args_parser.add_option(do_read_from_freed_memory_still_cached_by_malloc, "Write to recently free memory (tests an opportunistic malloc guard)", nullptr, 'y');
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args_parser.add_option(do_execute_non_executable_memory, "Attempt to execute non-executable memory (not mapped with PROT_EXEC)", nullptr, 'X');
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args_parser.add_option(do_trigger_user_mode_instruction_prevention, "Attempt to trigger an x86 User Mode Instruction Prevention fault", nullptr, 'U');
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args_parser.add_option(do_use_io_instruction, "Use an x86 I/O instruction in userspace", nullptr, 'I');
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args_parser.add_option(do_read_cpu_counter, "Read the x86 TSC (Time Stamp Counter) directly", nullptr, 'c');
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if (argc != 2) {
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args_parser.print_usage(stderr, argv[0]);
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exit(1);
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}
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args_parser.parse(argc, argv);
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Crash::RunType run_type = do_all_crash_types ? Crash::RunType::UsingChildProcess
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: Crash::RunType::UsingCurrentProcess;
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if (do_segmentation_violation || do_all_crash_types) {
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Crash("Segmentation violation", []() {
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volatile int* crashme = nullptr;
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*crashme = 0xbeef;
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_division_by_zero || do_all_crash_types) {
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Crash("Division by zero", []() {
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volatile int lala = 10;
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volatile int zero = 0;
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volatile int test = lala / zero;
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UNUSED_PARAM(test);
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_illegal_instruction|| do_all_crash_types) {
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Crash("Illegal instruction", []() {
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asm volatile("ud2");
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_abort || do_all_crash_types) {
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Crash("Abort", []() {
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abort();
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_read_from_uninitialized_malloc_memory || do_all_crash_types) {
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Crash("Read from uninitialized malloc memory", []() {
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auto* uninitialized_memory = (volatile u32**)malloc(1024);
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if (!uninitialized_memory)
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return Crash::Failure::UnexpectedError;
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volatile auto x = uninitialized_memory[0][0];
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UNUSED_PARAM(x);
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_read_from_uninitialized_malloc_memory || do_all_crash_types) {
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Crash("Read from freed memory", []() {
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auto* uninitialized_memory = (volatile u32**)malloc(1024);
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if (!uninitialized_memory)
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return Crash::Failure::UnexpectedError;
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free(uninitialized_memory);
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volatile auto x = uninitialized_memory[4][0];
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UNUSED_PARAM(x);
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_write_to_uninitialized_malloc_memory || do_all_crash_types) {
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Crash("Write to uninitialized malloc memory", []() {
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auto* uninitialized_memory = (volatile u32**)malloc(1024);
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if (!uninitialized_memory)
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return Crash::Failure::UnexpectedError;
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uninitialized_memory[4][0] = 1;
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_write_to_freed_memory || do_all_crash_types) {
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Crash("Write to freed memory", []() {
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auto* uninitialized_memory = (volatile u32**)malloc(1024);
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if (!uninitialized_memory)
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return Crash::Failure::UnexpectedError;
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free(uninitialized_memory);
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uninitialized_memory[4][0] = 1;
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_write_to_read_only_memory || do_all_crash_types) {
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Crash("Write to read only memory", []() {
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auto* ptr = (u8*)mmap(nullptr, 4096, PROT_READ | PROT_WRITE, MAP_ANON, 0, 0);
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if (ptr != MAP_FAILED)
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return Crash::Failure::UnexpectedError;
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*ptr = 'x'; // This should work fine.
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int rc = mprotect(ptr, 4096, PROT_READ);
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if (rc != 0 || *ptr != 'x')
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return Crash::Failure::UnexpectedError;
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*ptr = 'y'; // This should crash!
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_invalid_stack_pointer_on_syscall || do_all_crash_types) {
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Crash("Invalid stack pointer on syscall", []() {
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u8* makeshift_stack = (u8*)mmap(nullptr, 0, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_STACK, 0, 0);
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if (!makeshift_stack)
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return Crash::Failure::UnexpectedError;
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u8* makeshift_esp = makeshift_stack + 2048;
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asm volatile("mov %%eax, %%esp" ::"a"(makeshift_esp));
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getuid();
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dbgprintf("Survived syscall with MAP_STACK stack\n");
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u8* bad_stack = (u8*)mmap(nullptr, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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if (!bad_stack)
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return Crash::Failure::UnexpectedError;
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u8* bad_esp = bad_stack + 2048;
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asm volatile("mov %%eax, %%esp" ::"a"(bad_esp));
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getuid();
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_invalid_stack_pointer_on_page_fault || do_all_crash_types) {
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Crash("Invalid stack pointer on page fault", []() {
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u8* bad_stack = (u8*)mmap(nullptr, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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if (!bad_stack)
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return Crash::Failure::UnexpectedError;
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u8* bad_esp = bad_stack + 2048;
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asm volatile("mov %%eax, %%esp" ::"a"(bad_esp));
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asm volatile("pushl $0");
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_syscall_from_writeable_memory || do_all_crash_types) {
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Crash("Syscall from writable memory", []() {
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u8 buffer[] = { 0xb8, Syscall::SC_getuid, 0, 0, 0, 0xcd, 0x82 };
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((void (*)())buffer)();
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_read_from_freed_memory_still_cached_by_malloc || do_all_crash_types) {
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Crash("Read from memory still cached by malloc", []() {
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auto* ptr = (u8*)malloc(1024);
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if (!ptr)
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return Crash::Failure::UnexpectedError;
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free(ptr);
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dbgprintf("ptr = %p\n", ptr);
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volatile auto foo = *ptr;
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UNUSED_PARAM(foo);
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_write_to_freed_memory_still_cached_by_malloc || do_all_crash_types) {
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Crash("Write to freed memory still cached by malloc", []() {
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auto* ptr = (u8*)malloc(1024);
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if (!ptr)
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return Crash::Failure::UnexpectedError;
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free(ptr);
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dbgprintf("ptr = %p\n", ptr);
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*ptr = 'x';
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_execute_non_executable_memory || do_all_crash_types) {
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Crash("Execute non executable memory", []() {
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auto* ptr = (u8*)mmap(nullptr, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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if (ptr == MAP_FAILED)
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return Crash::Failure::UnexpectedError;
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ptr[0] = 0xc3; // ret
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typedef void* (*CrashyFunctionPtr)();
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((CrashyFunctionPtr)ptr)();
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_trigger_user_mode_instruction_prevention || do_all_crash_types) {
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Crash("Trigger x86 User Mode Instruction Prevention", []() {
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asm volatile("str %eax");
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_use_io_instruction || do_all_crash_types) {
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Crash("Attempt to use an I/O instruction", [] {
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u8 keyboard_status = IO::in8(0x64);
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printf("Keyboard status: %#02x\n", keyboard_status);
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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if (do_read_cpu_counter || do_all_crash_types) {
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Crash("Read the CPU timestamp counter", [] {
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asm volatile("rdtsc");
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return Crash::Failure::DidNotCrash;
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}).run(run_type);
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}
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return 0;
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}
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