Skip to content

Add fuzzer for locale module #47

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
AdamKorcz wants to merge 1 commit into
base: main
Choose a base branch
from
+34 −2
Draft

Add fuzzer for locale module #47

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 5 additions & 2 deletions Makefile
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
all : fuzzer-html fuzzer-email fuzzer-httpclient fuzzer-json fuzzer-difflib fuzzer-csv fuzzer-decode fuzzer-ast fuzzer-tarfile fuzzer-tarfile-hypothesis fuzzer-zipfile fuzzer-zipfile-hypothesis fuzzer-re fuzzer-configparser fuzzer-tomllib fuzzer-plistlib fuzzer-xml fuzzer-zoneinfo
all : fuzzer-html fuzzer-email fuzzer-httpclient fuzzer-json fuzzer-difflib fuzzer-csv fuzzer-decode fuzzer-ast fuzzer-tarfile fuzzer-tarfile-hypothesis fuzzer-zipfile fuzzer-zipfile-hypothesis fuzzer-re fuzzer-configparser fuzzer-tomllib fuzzer-plistlib fuzzer-xml fuzzer-zoneinfo fuzzer-locale

PYTHON_CONFIG_PATH=$(CPYTHON_INSTALL_PATH)/bin/python3-config
CXXFLAGS += $(shell $(PYTHON_CONFIG_PATH) --cflags)
LDFLAGS += -rdynamic $(shell $(PYTHON_CONFIG_PATH) --ldflags --embed)
LDFLAGS += -rdynamic $(shell $(PYTHON_CONFIG_PATH) --ldflags --embed) $(CPYTHON_MODLIBS) -Wl,--allow-multiple-definition

fuzzer-html:
clang++ $(CXXFLAGS) $(LIB_FUZZING_ENGINE) -std=c++17 fuzzer.cpp -DPYTHON_HARNESS_PATH="\"html.py\"" -ldl $(LDFLAGS) -o fuzzer-html
Expand Down Expand Up @@ -40,3 +40,6 @@ fuzzer-xml:
clang++ $(CXXFLAGS) $(LIB_FUZZING_ENGINE) -std=c++17 fuzzer.cpp -DPYTHON_HARNESS_PATH="\"xml.py\"" -ldl $(LDFLAGS) -o fuzzer-xml
fuzzer-zoneinfo:
clang++ $(CXXFLAGS) $(LIB_FUZZING_ENGINE) -std=c++17 fuzzer.cpp -DPYTHON_HARNESS_PATH="\"zoneinfo.py\"" -ldl $(LDFLAGS) -o fuzzer-zoneinfo

fuzzer-locale:
clang++ $(CXXFLAGS) $(LIB_FUZZING_ENGINE) -std=c++17 fuzzer.cpp -DPYTHON_HARNESS_PATH="\"locale.py\"" -ldl $(LDFLAGS) -o fuzzer-locale
1 change: 1 addition & 0 deletions fuzz_targets.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ email email.py
html html.py
httpclient httpclient.py
json json.py
locale locale.py
plistlib plist.py
re re.py
tarfile tarfile.py
Expand Down
28 changes: 28 additions & 0 deletions locale.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
from fuzzeddataprovider import FuzzedDataProvider
import locale

OP_STRXFRM = 0
OP_STRCOLL = 1

# Fuzzes the _locale C module (Modules/_localemodule.c).
# Exercises locale.strxfrm() for locale-aware string transformation
# and locale.strcoll() for locale-aware string comparison, both with
# fuzz-generated Unicode input.
def FuzzerRunOne(FuzzerInput):
if len(FuzzerInput) < 1 or len(FuzzerInput) > 0x10000:
return
fdp = FuzzedDataProvider(FuzzerInput)
target = fdp.ConsumeIntInRange(OP_STRXFRM, OP_STRCOLL)
n = fdp.ConsumeIntInRange(1, min(fdp.remaining_bytes(), 10000)) if fdp.remaining_bytes() > 0 else 0
if n == 0:
return
s = fdp.ConsumeUnicode(n)
try:
if target == OP_STRXFRM:
locale.strxfrm(s)
elif target == OP_STRCOLL:
n2 = fdp.ConsumeIntInRange(1, min(fdp.remaining_bytes(), 10000)) if fdp.remaining_bytes() > 0 else 0
s2 = fdp.ConsumeUnicode(n2) if n2 > 0 else ""
locale.strcoll(s, s2)
except Exception:
pass
Loading