New submission from AMRIT RAI <shaanbh...@gmail.com>:
The current zipFile implementation supports the allowZip64,which can make large zip files. There is a bug in the current implementation of close method ,where the extra field is overwritten . To reproduce it : 1.Create a directory with more then 4 GB of data(spread over many files). 2.Make the zip of those files using the any rar achiever which adds NTFS metadata(mtime,atime and ctime) of files in the zip. 3.Apped a new file to the zip using the zip library . When i open the zip again ,the files processed after the ZIP64_LIMIT is reached will have there extra fields overwritten. I have attached the zip which contained the python used to add the new file, and the images of zip archive before adding new files and after. ---------- components: Library (Lib) files: zip_bug.zip messages: 393178 nosy: shaanbhaya priority: normal severity: normal status: open title: Zipfile lib overwrites the extra field during closing when the archive size is more then ZIP64_LIMIT type: behavior versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9 Added file: https://bugs.python.org/file50025/zip_bug.zip _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44067> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
