From 9dea0c076a5464555d091c5a05862b2993aed197 Mon Sep 17 00:00:00 2001
From: Evan Richter <evanjrichter@gmail.com>
Date: Sun, 10 Jul 2022 19:11:13 -0500
Subject: [PATCH 1/2] cargo fuzz harness

---
 fuzz/.gitignore         |    4 +
 fuzz/Cargo.lock         | 2269 +++++++++++++++++++++++++++++++++++++++
 fuzz/Cargo.toml         |   31 +
 fuzz/fuzz_targets/vm.rs |   39 +
 4 files changed, 2343 insertions(+)
 create mode 100644 fuzz/.gitignore
 create mode 100644 fuzz/Cargo.lock
 create mode 100644 fuzz/Cargo.toml
 create mode 100644 fuzz/fuzz_targets/vm.rs

diff --git a/fuzz/.gitignore b/fuzz/.gitignore
new file mode 100644
index 00000000000..1a45eee7760
--- /dev/null
+++ b/fuzz/.gitignore
@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
new file mode 100644
index 00000000000..09f9301f7d7
--- /dev/null
+++ b/fuzz/Cargo.lock
@@ -0,0 +1,2269 @@
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+checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
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+ "static_assertions",
+]
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+
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+]
+
+[[package]]
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+ "unic-ucd-version",
+]
+
+[[package]]
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+version = "0.9.0"
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+ "unic-char-range",
+ "unic-ucd-hangul",
+ "unic-ucd-version",
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+
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+]
+
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+
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+
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+checksum = "854cbdc4f7bc6ae19c820d44abdc3277ac3e1b2b93db20a636825d9322fb60e6"
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+ "tinyvec",
+]
+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+checksum = "eec8e807a365e5c972debc47b8f06d361b37b94cfd18d48f7adc715fb86404dd"
+
+[[package]]
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+
+[[package]]
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+
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+
+[[package]]
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+
+[[package]]
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+
+[[package]]
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+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
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+checksum = "7c53b543413a17a202f4be280a7e5c62a1c69345f5de525ee64f8cfdbc954994"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
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+version = "0.2.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5491a68ab4500fa6b4d726bd67408630c3dbe9c4fe7bda16d5c82a1fd8c7340a"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c441e177922bc58f1e12c022624b6216378e5febc2f0533e41ba443d505b80aa"
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+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d94ac45fcf608c1f45ef53e748d35660f168490c10b23704c7779ab8f5c3048"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a89911bd99e5f3659ec4acf9c4d93b0a90fe4a2a11f15328472058edc5261be"
+
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+dependencies = [
+ "either",
+ "lazy_static",
+ "libc",
+]
+
+[[package]]
+name = "widestring"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17882f045410753661207383517a6f62ec3dbeb6a4ed2acce01f0728238d1983"
+
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+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
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+checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
+dependencies = [
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
+
+[[package]]
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+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
+
+[[package]]
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+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.36.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
+
+[[package]]
+name = "winreg"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "xml-rs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
new file mode 100644
index 00000000000..b4525afbcae
--- /dev/null
+++ b/fuzz/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "rustpython-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.rustpython]
+path = ".."
+features = ["freeze-stdlib", "jit"]
+
+[dependencies.rustpython-vm]
+path = "../vm"
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "vm"
+path = "fuzz_targets/vm.rs"
+test = false
+doc = false
+
+[profile.release]
+debug = true
diff --git a/fuzz/fuzz_targets/vm.rs b/fuzz/fuzz_targets/vm.rs
new file mode 100644
index 00000000000..7f776ccae10
--- /dev/null
+++ b/fuzz/fuzz_targets/vm.rs
@@ -0,0 +1,39 @@
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+
+use rustpython::vm::compile::Mode;
+use rustpython_vm::{
+    builtins::{PyBaseException, PyCode},
+    compile::CompileError,
+    prelude::*,
+};
+
+fuzz_target!(|src: &str| {
+    let _ = fuzz(0, src);
+});
+
+fn fuzz(
+    opt: u8,
+    src: &str,
+) -> (
+    Result<PyRef<PyCode>, CompileError>,
+    Option<Result<PyObjectRef, PyRef<PyBaseException>>>,
+) {
+    let mut options: Settings = Default::default();
+    options.interactive = false;
+    options.optimize = opt;
+
+    Interpreter::without_stdlib(options).enter(|vm| {
+        for item in ["__loader__", "input", "print", "__import__", "open"] {
+            vm.builtins.dict().del_item(item, vm).unwrap();
+        }
+        let scope = vm.new_scope_with_builtins();
+        let a = vm.compile(src, Mode::Exec, "<fuzz>".to_owned());
+        let b = if let Ok(code_obj) = &a {
+            Some(vm.run_code_obj(code_obj.clone(), scope))
+        } else {
+            None
+        };
+        (a, b)
+    })
+}

From 7c23f05620cc6c2573160d30a0f0519482219dfe Mon Sep 17 00:00:00 2001
From: Evan Richter <evanjrichter@gmail.com>
Date: Sun, 10 Jul 2022 19:11:24 -0500
Subject: [PATCH 2/2] mayhem integration

---
 .github/workflows/mayhem.yml | 73 ++++++++++++++++++++++++++++++++++++
 mayhem/.dockerignore         |  3 ++
 mayhem/Dockerfile            | 23 ++++++++++++
 mayhem/vm.mayhemfile         |  7 ++++
 4 files changed, 106 insertions(+)
 create mode 100644 .github/workflows/mayhem.yml
 create mode 100644 mayhem/.dockerignore
 create mode 100644 mayhem/Dockerfile
 create mode 100644 mayhem/vm.mayhemfile

diff --git a/.github/workflows/mayhem.yml b/.github/workflows/mayhem.yml
new file mode 100644
index 00000000000..3ec30b57cee
--- /dev/null
+++ b/.github/workflows/mayhem.yml
@@ -0,0 +1,73 @@
+name: Mayhem
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    name: 'build mayhem fuzzing container'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - run: |
+          sudo swapon -s
+          free -m
+          df -h
+          sudo fallocate -l 8G /swapfile
+          ls -lh /swapfile
+          sudo chmod 600 /swapfile
+          ls -lh /swapfile
+          sudo mkswap /swapfile
+          sudo swapon /swapfile
+          sudo swapon -s
+          free -m
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          file: mayhem/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+    outputs:
+      image: ${{ steps.meta.outputs.tags }}
+
+  mayhem:
+    needs: build
+    name: 'fuzz ${{ matrix.mayhemfile }}'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        mayhemfile:
+          - mayhem/vm.mayhemfile
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Start analysis for ${{ matrix.mayhemfile }}
+        uses: ForAllSecure/mcode-action@v1
+        with:
+          mayhem-token: ${{ secrets.MAYHEM_TOKEN }}
+          args: --image ${{ needs.build.outputs.image }} --file ${{ matrix.mayhemfile }} --duration 300
+          sarif-output: sarif
diff --git a/mayhem/.dockerignore b/mayhem/.dockerignore
new file mode 100644
index 00000000000..078639e872c
--- /dev/null
+++ b/mayhem/.dockerignore
@@ -0,0 +1,3 @@
+/target
+.git
+mayhem/Dockerfile
diff --git a/mayhem/Dockerfile b/mayhem/Dockerfile
new file mode 100644
index 00000000000..7b337635e0c
--- /dev/null
+++ b/mayhem/Dockerfile
@@ -0,0 +1,23 @@
+# Build Stage
+FROM ghcr.io/evanrichter/cargo-fuzz:latest as builder
+
+## Add source code to the build stage.
+ADD . /src
+WORKDIR /src
+
+RUN echo building instrumented harnesses && \
+    bash -c "pushd fuzz && cargo +nightly -Z sparse-registry fuzz build && popd" && \
+    mv fuzz/target/x86_64-unknown-linux-gnu/release/vm /vm && \
+    echo done
+
+RUN echo building non-instrumented harnesses && \
+    bash -c "pushd fuzz && cargo +nightly -Z sparse-registry fuzz build --disable-instrumentation && popd" && \
+    mv fuzz/target/x86_64-unknown-linux-gnu/release/vm /vm_no_inst && \
+    echo done
+
+# Package Stage
+FROM rustlang/rust:nightly
+
+COPY --from=builder /vm  /vm_no_inst /
+RUN mkdir /testsuite
+COPY --from=builder /src/extra_tests/snippets/ /testsuite/
diff --git a/mayhem/vm.mayhemfile b/mayhem/vm.mayhemfile
new file mode 100644
index 00000000000..718faa26214
--- /dev/null
+++ b/mayhem/vm.mayhemfile
@@ -0,0 +1,7 @@
+project: rustpython
+target: vm
+
+cmds:
+  - cmd: /vm -- -detect_leaks=0
+  - cmd: /vm_no_inst @@ -- -detect_leaks=0
+    libfuzzer: false