Mercurial > hg-stable
changeset 41027:6a951f535fee
fuzz: new fuzzer for parsers.fm1readmarkers
Differential Revision: https://phab.mercurial-scm.org/D5465
| author | Augie Fackler <augie@google.com> |
|---|---|
| date | Thu, 20 Dec 2018 01:22:58 -0500 |
| parents | 5c68b617ba24 |
| children | 3c5aaea9638f |
| files | contrib/fuzz/Makefile contrib/fuzz/fm1readmarkers.cc contrib/fuzz/fm1readmarkers_corpus.py |
| diffstat | 3 files changed, 109 insertions(+), 1 deletions(-) [+] |
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--- a/contrib/fuzz/Makefile Thu Dec 20 01:26:39 2018 -0500 +++ b/contrib/fuzz/Makefile Thu Dec 20 01:22:58 2018 -0500 @@ -146,12 +146,23 @@ dirstate_corpus.zip: python dirstate_corpus.py $$OUT/dirstate_fuzzer_seed_corpus.zip +fm1readmarkers_fuzzer: sanpy fm1readmarkers.cc manifest.o charencode.o parsers.o dirs.o pathencode.o revlog.o pyutil.o + $(CXX) $(CXXFLAGS) `$$OUT/sanpy/bin/python-config --cflags` \ + -Wno-register -Wno-macro-redefined \ + -I../../mercurial fm1readmarkers.cc \ + manifest.o charencode.o parsers.o dirs.o pathencode.o revlog.o pyutil.o \ + -lFuzzingEngine `$$OUT/sanpy/bin/python-config --ldflags` \ + -o $$OUT/fm1readmarkers_fuzzer + +fm1readmarkers_corpus.zip: + python fm1readmarkers_corpus.py $$OUT/fm1readmarkers_fuzzer_seed_corpus.zip + clean: $(RM) *.o *_fuzzer \ bdiff \ mpatch \ xdiff -oss-fuzz: bdiff_fuzzer mpatch_fuzzer mpatch_corpus.zip xdiff_fuzzer manifest_fuzzer manifest_corpus.zip revlog_fuzzer revlog_corpus.zip dirstate_fuzzer dirstate_corpus.zip +oss-fuzz: bdiff_fuzzer mpatch_fuzzer mpatch_corpus.zip xdiff_fuzzer manifest_fuzzer manifest_corpus.zip revlog_fuzzer revlog_corpus.zip dirstate_fuzzer dirstate_corpus.zip fm1readmarkers_fuzzer fm1readmarkers_corpus.zip .PHONY: all clean oss-fuzz sanpy
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/contrib/fuzz/fm1readmarkers.cc Thu Dec 20 01:22:58 2018 -0500 @@ -0,0 +1,60 @@ +#include <Python.h> +#include <assert.h> +#include <stdlib.h> +#include <unistd.h> + +#include <string> + +#include "pyutil.h" + +extern "C" { + +static PyCodeObject *code; + +extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) +{ + contrib::initpy(*argv[0]); + code = (PyCodeObject *)Py_CompileString(R"py( +from parsers import fm1readmarkers +def maybeint(s, default): + try: + return int(s) + except ValueError: + return default +try: + parts = data.split('\0', 2) + if len(parts) == 3: + offset, stop, data = parts + elif len(parts) == 2: + stop, data = parts + offset = 0 + else: + offset = stop = 0 + offset, stop = maybeint(offset, 0), maybeint(stop, len(data)) + fm1readmarkers(data, offset, stop) +except Exception as e: + pass + # uncomment this print if you're editing this Python code + # to debug failures. + # print e +)py", + "fuzzer", Py_file_input); + return 0; +} + +int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) +{ + PyObject *text = + PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size); + PyObject *locals = PyDict_New(); + PyDict_SetItemString(locals, "data", text); + PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals); + if (!res) { + PyErr_Print(); + } + Py_XDECREF(res); + Py_DECREF(locals); + Py_DECREF(text); + return 0; // Non-zero return values are reserved for future use. +} +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/contrib/fuzz/fm1readmarkers_corpus.py Thu Dec 20 01:22:58 2018 -0500 @@ -0,0 +1,37 @@ +from __future__ import absolute_import, print_function + +import argparse +import os +import zipfile + +ap = argparse.ArgumentParser() +ap.add_argument("out", metavar="some.zip", type=str, nargs=1) +args = ap.parse_args() + +with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf: + zf.writestr( + 'smallish_obsstore', + ( + # header: fm1readmarkers should start at offset 1, and + # read until byte 597. + '1\x00597\x00' + # body of obsstore file + '\x01\x00\x00\x00vA\xd7\x02+C\x1a<)\x01,\x00\x00\x01\x03\x03\xe6' + '\x92\xde)x\x16\xd1Xph\xc7\xa7[\xe5\xe2\x1a\xab\x1e6e\xaf\xc2\xae' + '\xe7\xbc\x83\xe1\x88\xa5\xda\xce>O\xbd\x04\xe9\x03\xc4o\xeb\x03' + '\x01\t\x05\x04\x1fef18operationamenduserAugie Fackler <raf@duri' + 'n42.com>\x00\x00\x00vA\xd7\x02-\x8aD\xaf-\x01,\x00\x00\x01\x03\x03' + '\x17*\xca\x8f\x9e}i\xe0i\xbb\xdf\x9fb\x03\xd2XG?\xd3h\x98\x89\x1a' + '=2\xeb\xc3\xc5<\xb3\x9e\xcc\x0e;#\xee\xc3\x10ux\x03\x01\t\x05\x04' + '\x1fef18operationamenduserAugie Fackler <raf@durin42.com>\x00\x00' + '\x00vA\xd7\x02Mn\xd9%\xea\x01,\x00\x00\x01\x03\x03\x98\x89\x1a=' + '2\xeb\xc3\xc5<\xb3\x9e\xcc\x0e;#\xee\xc3\x10ux\xe0*\xcaT\x86Z8J' + '\x85)\x97\xff7\xcc)\xc1\x7f\x19\x0c\x01\x03\x01\t\x05\x04\x1fef' + '18operationamenduserAugie Fackler <raf@durin42.com>\x00\x00\x00' + 'yA\xd7\x02MtA\xbfj\x01,\x00\x00\x01\x03\x03\xe0*\xcaT\x86Z8J\x85' + ')\x97\xff7\xcc)\xc1\x7f\x19\x0c\x01\x00\x94\x01\xa9\n\xf80\x92\xa3' + 'j\xc5X\xb1\xc9:\xd51\xb8*\xa9\x03\x01\t\x08\x04\x1fef11operatio' + 'nhistedituserAugie Fackler <raf@durin42.com>\x00\x00\x00yA\xd7\x02' + 'MtA\xd4\xe1\x01,\x00\x00\x01\x03\x03"\xa5\xcb\x86\xb6\xf4\xbaO\xa0' + 'sH\xe7?\xcb\x9b\xc2n\xcfI\x9e\x14\xf0D\xf0!\x18DN\xcd\x97\x016\xa5' + '\xef\xa06\xcb\x884\x8a\x03\x01\t\x08\x04\x1fef14operationhisted'))