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Fix Fuzzer Crash in ClusterFuzz Due to Missing Git Executable#1906

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9 changes: 7 additions & 2 deletionsfuzzing/fuzz-targets/fuzz_config.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -20,16 +20,21 @@
import atheris
import sys
import io
import os
from configparser import MissingSectionHeaderError, ParsingError

with atheris.instrument_imports():
from gitimportGitConfigParser
importgit


def TestOneInput(data):
if getattr(sys, "frozen", False) and hasattr(sys, "_MEIPASS"):
path_to_bundled_git_binary = os.path.abspath(os.path.join(os.path.dirname(__file__), "git"))
git.refresh(path_to_bundled_git_binary)

sio = io.BytesIO(data)
sio.name = "/tmp/fuzzconfig.config"
git_config = GitConfigParser(sio)
git_config =git.GitConfigParser(sio)
try:
git_config.read()
except (MissingSectionHeaderError, ParsingError, UnicodeDecodeError):
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11 changes: 7 additions & 4 deletionsfuzzing/fuzz-targets/fuzz_tree.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -24,11 +24,14 @@
import shutil

with atheris.instrument_imports():
from git.objects import Tree
from git.repo import Repo
import git


def TestOneInput(data):
if getattr(sys, "frozen", False) and hasattr(sys, "_MEIPASS"):
path_to_bundled_git_binary = os.path.abspath(os.path.join(os.path.dirname(__file__), "git"))
git.refresh(path_to_bundled_git_binary)

fdp = atheris.FuzzedDataProvider(data)
git_dir = "/tmp/.git"
head_file = os.path.join(git_dir, "HEAD")
Expand All@@ -46,9 +49,9 @@ def TestOneInput(data):
os.mkdir(common_dir)
os.mkdir(objects_dir)

_repo = Repo("/tmp/")
_repo =git.Repo("/tmp/")

fuzz_tree = Tree(_repo, Tree.NULL_BIN_SHA, 0, "")
fuzz_tree =git.Tree(_repo,git.Tree.NULL_BIN_SHA, 0, "")
try:
fuzz_tree._deserialize(io.BytesIO(data))
except IndexError:
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2 changes: 1 addition & 1 deletionfuzzing/oss-fuzz-scripts/build.sh
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Expand Up@@ -14,7 +14,7 @@ find "$SEED_DATA_DIR" \( -name '*_seed_corpus.zip' -o -name '*.options' -o -name

# Build fuzzers in $OUT.
find "$SRC/gitpython/fuzzing" -name 'fuzz_*.py' -print0 | while IFS= read -r -d '' fuzz_harness; do
compile_python_fuzzer "$fuzz_harness"
compile_python_fuzzer "$fuzz_harness" --add-binary="$(command -v git):."

common_base_dictionary_filename="$SEED_DATA_DIR/__base.dict"
if [[ -r "$common_base_dictionary_filename" ]]; then
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