-
-
Notifications
You must be signed in to change notification settings - Fork 30.3k
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.
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
Found Heap-use-after-free errors and SEGV in Python #103824
Comments
CC: @lysnikolaou |
I can reproduce use-after-free errors detected in Unfortunately, I don't get use-after-free error with |
Thanks a lot. |
* main: (463 commits) pythongh-104057: Fix direct invocation of test_super (python#104064) pythongh-87092: Expose assembler to unit tests (python#103988) pythongh-97696: asyncio eager tasks factory (python#102853) pythongh-84436: Immortalize in _PyStructSequence_InitBuiltinWithFlags() (pythongh-104054) pythongh-104057: Fix direct invocation of test_module (pythonGH-104059) pythongh-100458: Clarify Enum.__format__() change of mixed-in types in the whatsnew/3.11.rst (pythonGH-100387) pythongh-104018: disallow "z" format specifier in %-format of byte strings (pythonGH-104033) pythongh-104016: Fixed off by 1 error in f string tokenizer (python#104047) pythonGH-103629: Update Unpack's repr in compliance with PEP 692 (python#104048) pythongh-102799: replace sys.exc_info by sys.exception in inspect and traceback modules (python#104032) Fix typo in "expected" word in few source files (python#104034) pythongh-103824: fix use-after-free error in Parser/tokenizer.c (python#103993) pythongh-104035: Do not ignore user-defined `__{get,set}state__` in slotted frozen dataclasses (python#104041) pythongh-104028: Reduce object creation while calling callback function from gc (pythongh-104030) pythongh-104036: Fix direct invocation of test_typing (python#104037) pythongh-102213: Optimize the performance of `__getattr__` (pythonGH-103761) pythongh-103895: Improve how invalid `Exception.__notes__` are displayed (python#103897) Adjust expression from `==` to `!=` in alignment with the meaning of the paragraph. (pythonGH-104021) pythongh-88496: Fix IDLE test hang on macOS (python#104025) Improve int test coverage (python#104024) ...
Resolved in #103993. |
Did this ever affect other release lines? |
We would also be interested in the answer to this question, if possible. Thanks a lot! |
I just did another check on 3.11 and everything appears to be okay. As far as I can see, this only ever affected 3.12, since it was introduced in the implementation of PEP 701. |
Your environment
Bug description
The AddressSanitizer (ASAN) tool has detected multiple heap-use-after-free errors and a segmentation fault (SEGV) in the Python interpreter. The heap-use-after-free errors occurred in the ascii_decode and unicode_decode_utf8 functions in the unicodeobject.c file, and the SEGV occurred in the tok_backup function in the tokenizer.c file. Additionally, a memory leak was detected in the pystate.c file.
Steps to reproduce
./configure && make
./python < poc_file
Expected behavior
No heap-use-after-free errors or SEGV should occur.
Actual behavior
ASAN detected multiple heap-use-after-free errors and a SEGV, as well as a memory leak.
Relevant logs and/or screenshots
The ASAN summary output is as follows:
asan.log
python_bug_poc.zip
Linked PRs
The text was updated successfully, but these errors were encountered: