Closed as not planned
Description
Bug report
We did a fuzzing test on Python3.9.15, a memory error happened.
from operator import *
import operator
def demoFunc(arg1,arg2):
try:
ret = operator.imod(arg1, arg2)
except (AssertionError, AttributeError, ImportError, LookupError, OSError, TypeError, ValueError) as e:
pass
a= b"b'hhnZJ)uoMtf8CzdP#FBWi!RLUA3jIUIVB0bN%0333333333333r1YuFodxIuzDaR%N'"
b= ""
demoFunc(a,b)Bug info
#1 0x499621 in PyMem_RawMalloc /root/CpyFuzz/experiments/Python-3.9.15/Objects/obmalloc.c:572:12
#2 0x499621 in _PyObject_Malloc /root/CpyFuzz/experiments/Python-3.9.15/Objects/obmalloc.c:1645:11
#3 0x41f83e in _PyBytes_FromSize /root/CpyFuzz/experiments/Python-3.9.15/Objects/bytesobject.c:81:31
#4 0x41f83e in PyBytes_FromStringAndSize /root/CpyFuzz/experiments/Python-3.9.15/Objects/bytesobject.c:112:27
#5 0x428506 in _PyBytesWriter_Resize /root/CpyFuzz/experiments/Python-3.9.15/Objects/bytesobject.c:3348:30
#6 0x422faa in _PyBytesWriter_Prepare /root/CpyFuzz/experiments/Python-3.9.15/Objects/bytesobject.c:3401:15
#7 0x422faa in _PyBytes_FormatEx /root/CpyFuzz/experiments/Python-3.9.15/Objects/bytesobject.c:962:23
#8 0x6be614 in binary_op1 /root/CpyFuzz/experiments/Python-3.9.15/Objects/abstract.c:869:13
#9 0x6c0394 in binary_iop1 /root/CpyFuzz/experiments/Python-3.9.15/Objects/abstract.c:1125:12
#10 0x6c0394 in binary_iop /root/CpyFuzz/experiments/Python-3.9.15/Objects/abstract.c:1132:24
#11 0x6c0394 in PyNumber_InPlaceRemainder /root/CpyFuzz/experiments/Python-3.9.15/Objects/abstract.c:1228:12
#12 0x6fabbe in cfunction_vectorcall_FASTCALL /root/CpyFuzz/experiments/Python-3.9.15/Objects/methodobject.c:430:24
#13 0x5635fd in _PyObject_VectorcallTstate /root/CpyFuzz/experiments/Python-3.9.15/./Include/cpython/abstract.h:118:11
#14 0x5635fd in PyObject_Vectorcall /root/CpyFuzz/experiments/Python-3.9.15/./Include/cpython/abstract.h:127:12
#15 0x5635fd in call_function /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:5077:13
#16 0x55d8bf in _PyEval_EvalFrameDefault /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:3489:23
#17 0x43336f in _PyEval_EvalFrame /root/CpyFuzz/experiments/Python-3.9.15/./Include/internal/pycore_ceval.h:40:12
#18 0x43336f in function_code_fastcall /root/CpyFuzz/experiments/Python-3.9.15/Objects/call.c:330:24
#19 0x5635fd in _PyObject_VectorcallTstate /root/CpyFuzz/experiments/Python-3.9.15/./Include/cpython/abstract.h:118:11
#20 0x5635fd in PyObject_Vectorcall /root/CpyFuzz/experiments/Python-3.9.15/./Include/cpython/abstract.h:127:12
#21 0x5635fd in call_function /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:5077:13
#22 0x55d96e in _PyEval_EvalFrameDefault /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:3520:19
#23 0x565264 in _PyEval_EvalFrame /root/CpyFuzz/experiments/Python-3.9.15/./Include/internal/pycore_ceval.h:40:12
#24 0x565264 in _PyEval_EvalCode /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:4329:14
#25 0x554061 in _PyEval_EvalCodeWithName /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:4361:12
#26 0x554061 in PyEval_EvalCodeEx /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:4377:12
#27 0x554061 in PyEval_EvalCode /root/CpyFuzz/experiments/Python-3.9.15/Python/ceval.c:828:12
#28 0x5d2367 in run_eval_code_obj /root/CpyFuzz/experiments/Python-3.9.15/Python/pythonrun.c:1221:9
#29 0x5d2367 in run_mod /root/CpyFuzz/experiments/Python-3.9.15/Python/pythonrun.c:1242:19
#30 0x5d2367 in pyrun_file /root/CpyFuzz/experiments/Python-3.9.15/Python/pythonrun.c:1140:15
#31 0x5cedc6 in pyrun_simple_file /root/CpyFuzz/experiments/Python-3.9.15/Python/pythonrun.c:450:13
#32 0x5cedc6 in PyRun_SimpleFileExFlags /root/CpyFuzz/experiments/Python-3.9.15/Python/pythonrun.c:483:15
#33 0x41e1fd in pymain_run_file /root/CpyFuzz/experiments/Python-3.9.15/Modules/main.c:373:15
#34 0x41e1fd in pymain_run_python /root/CpyFuzz/experiments/Python-3.9.15/Modules/main.c:598:21
#35 0x41e1fd in Py_RunMain /root/CpyFuzz/experiments/Python-3.9.15/Modules/main.c:677:5
#36 0x41ea66 in pymain_main /root/CpyFuzz/experiments/Python-3.9.15/Modules/main.c:707:12
#37 0x41ead2 in Py_BytesMain /root/CpyFuzz/experiments/Python-3.9.15/Modules/main.c:731:12
#38 0x7f6044dfdc86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
My environment
CPython: 3.9.15
Ubuntu: 18.0.4 (x86 64)