Ross Lagerwall <rosslagerw...@gmail.com> added the comment: >From what I can see, this issue is in memoryview and allows memoryview to >export a readonly buffer as writable (because memoryview.getbuffer() removes >the writable flag from flags before calling the underlying buffer).
This causes segfaults when using mmap. If a bytes object is used as the underlying buffer, it allows the bytes object to be changed. Given this code: import io b=b"XXXX" m=memoryview(b) i=io.BytesIO(b'ZZZZ') i.readinto(m) print(b) print(b == b"XXXX") The output is: b'ZZZZ' True I think this is due to interning. Anyway, attached is a patch which hopefully fixes the issue + a test. ---------- keywords: +patch nosy: +rosslagerwall Added file: http://bugs.python.org/file20437/i10451.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue10451> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
