python crash at ffi call #140408
Description
Crash report
What happened?
import unittest
from ctypes import CDLL, POINTER, sizeof, c_byte, c_short, c_int, c_long, c_char, c_wchar, c_char_p
from test.support import import_helper
_ctypes_test = import_helper.import_module('_ctypes_test')
class SlicesTestCase(unittest.TestCase):
dll = CDLL(_ctypes_test.__file__)
s = None
class allocated_c_char_p(c_char_p):
pass
def errcheck(result, func, args):
return retval
try:
res = dll.my_strdup(s)
finally:
del dll.my_strdup.errcheck
if __name__ == '__main__':
def __init__(self, addr, handler, poll_interval=0.5, log=False, sslctx=None):
super(DelegatingHTTPRequestHandler, self).log_message(format, *args)AddressSanitizer:DEADLYSIGNAL
=================================================================
==391683==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f684967d91c bp 0x7ffe655598b0 sp 0x7ffe65559038 T0)
==391683==The signal is caused by a READ memory access.
==391683==Hint: address points to the zero page.
#0 0x7f684967d91c in __strlen_evex ../sysdeps/x86_64/multiarch/strlen-evex-base.S:81
#1 0x7f684985a826 in strlen ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:389
#2 0x7f68449b4e92 in my_strdup ../Modules/_ctypes/_ctypes_test.c:541
#3 0x7f6848b10b15 (/lib/x86_64-linux-gnu/libffi.so.8+0x7b15) (BuildId: c9149b6e99105aa4321ddd4a10ee4b90de7b7d49)
#4 0x7f6848b0d3ee (/lib/x86_64-linux-gnu/libffi.so.8+0x43ee) (BuildId: c9149b6e99105aa4321ddd4a10ee4b90de7b7d49)
#5 0x7f6848b100bd in ffi_call (/lib/x86_64-linux-gnu/libffi.so.8+0x70bd) (BuildId: c9149b6e99105aa4321ddd4a10ee4b90de7b7d49)
#6 0x7f684581c8d0 in _call_function_pointer ../Modules/_ctypes/callproc.c:945
#7 0x7f684581c8d0 in _ctypes_callproc ../Modules/_ctypes/callproc.c:1311
#8 0x7f684580e646 in PyCFuncPtr_call ../Modules/_ctypes/_ctypes.c:4685
#9 0x5dc53d7dc78d in _PyObject_MakeTpCall ../Objects/call.c:242
#10 0x5dc53d680b82 in _PyEval_EvalFrameDefault ../Python/generated_cases.c.h:1620
#11 0x5dc53db5cbb5 in _PyEval_EvalFrame ../Include/internal/pycore_ceval.h:121
#12 0x5dc53db5cbb5 in _PyEval_Vector ../Python/ceval.c:2001
#13 0x5dc53db48a48 in builtin___build_class__ ../Python/bltinmodule.c:205
#14 0x5dc53d7de1a7 in _PyObject_VectorcallTstate ../Include/internal/pycore_call.h:169
#15 0x5dc53d7de1a7 in PyObject_Vectorcall ../Objects/call.c:327
#16 0x5dc53d680b82 in _PyEval_EvalFrameDefault ../Python/generated_cases.c.h:1620
#17 0x5dc53db5c3e6 in _PyEval_EvalFrame ../Include/internal/pycore_ceval.h:121
#18 0x5dc53db5c3e6 in _PyEval_Vector ../Python/ceval.c:2001
#19 0x5dc53db5c3e6 in PyEval_EvalCode ../Python/ceval.c:884
#20 0x5dc53dca1cce in run_eval_code_obj ../Python/pythonrun.c:1365
#21 0x5dc53dca1cce in run_mod ../Python/pythonrun.c:1459
#22 0x5dc53dca6977 in pyrun_file ../Python/pythonrun.c:1293
#23 0x5dc53dca6977 in _PyRun_SimpleFileObject ../Python/pythonrun.c:521
#24 0x5dc53dca749c in _PyRun_AnyFileObject ../Python/pythonrun.c:81
#25 0x5dc53dd1a7fc in pymain_run_file_obj ../Modules/main.c:410
#26 0x5dc53dd1a7fc in pymain_run_file ../Modules/main.c:429
#27 0x5dc53dd1a7fc in pymain_run_python ../Modules/main.c:691
#28 0x5dc53dd1c0de in Py_RunMain ../Modules/main.c:772
#29 0x5dc53dd1c0de in pymain_main ../Modules/main.c:802
#30 0x5dc53dd1c0de in Py_BytesMain ../Modules/main.c:826
#31 0x7f684950c1c9 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
#32 0x7f684950c28a in __libc_start_main_impl ../csu/libc-start.c:360
#33 0x5dc53d6b6524 in _start (/home/fuzz/WorkSpace/flowfusion-cpython/cpython-normal/build/python+0x20e524) (BuildId: b922665a0e7afc8ee52df7c3eac25a643025109e)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ../sysdeps/x86_64/multiarch/strlen-evex-base.S:81 in __strlen_evex
==391683==ABORTING
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux
Output from running 'python -VV' on the command line:
No response