https://github.com/python/cpython/commit/58a3681fd22a53c1833c885a7d9d47c8d54cba6a commit: 58a3681fd22a53c1833c885a7d9d47c8d54cba6a branch: 3.14 author: Miss Islington (bot) <[email protected]> committer: serhiy-storchaka <[email protected]> date: 2026-05-22T09:46:05Z summary:
[3.14] gh-137571: Protect against possible UnboundLocalError in gzip._GzipReader.read() (GH-150222) (GH-150230) This has not been observed in practice, but we cannot be 100% sure that it will not happen with some weird gzip data. (cherry picked from commit 28eac9a7263ad8dcfa9b536aa238549131857e0f) Co-authored-by: Serhiy Storchaka <[email protected]> files: M Lib/gzip.py diff --git a/Lib/gzip.py b/Lib/gzip.py index c00f51858de0f0..7514ad5bf24f26 100644 --- a/Lib/gzip.py +++ b/Lib/gzip.py @@ -575,10 +575,10 @@ def read(self, size=-1): # Read a chunk of data from the file if self._decompressor.needs_input: buf = self._fp.read(READ_BUFFER_SIZE) - uncompress = self._decompressor.decompress(buf, size) else: - uncompress = self._decompressor.decompress(b"", size) + buf = b"" + uncompress = self._decompressor.decompress(buf, size) if self._decompressor.unused_data != b"": # Prepend the already read bytes to the fileobj so they can # be seen by _read_eof() and _read_gzip_header() _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
