[issue19878] bz2.BZ2File.__init__() cannot be called twice with non-existent file
Roundup Robot added the comment: New changeset 3337298f5c75 by Nadeem Vawda in branch '2.7': Skip test for #19878 on Windows. http://hg.python.org/cpython/rev/3337298f5c75 -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19878 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19878] bz2.BZ2File.__init__() cannot be called twice with non-existent file
Roundup Robot added the comment: New changeset 55a748f6e396 by Nadeem Vawda in branch '2.7': Closes #19878: Fix segfault in bz2 module. http://hg.python.org/cpython/rev/55a748f6e396 -- nosy: +python-dev resolution: - fixed stage: needs patch - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19878 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19878] bz2.BZ2File.__init__() cannot be called twice
STINNER Victor added the comment:
I can reproduce the issue with Python 2.7. The problem is that
BZ2File.__init__() doesn't reset the object when __init__() is called twice.
For example, the following script fails with too many open files error,
before the previous file is not called:
---
import bz2
obj = bz2.BZ2File('bla.bz2')
for loop in range(1024*10):
obj.__init__('bla.bz2')
---
By the way, why do you call __init__() twice? Why not creating a new object?
BZ2File was rewritten in pure Python in Python 3.3. Python 3.3+ is not affected
by this issue.
--
nosy: +haypo, serhiy.storchaka
resolution: rejected -
stage: committed/rejected -
status: closed - open
title: PyFile_DecUseCount() SIGSEGV - bz2.BZ2File.__init__() cannot be called
twice
versions: +Python 2.7 -Python 2.6
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[issue19878] bz2.BZ2File.__init__() cannot be called twice
Matthew Bergin added the comment: I was fuzzing the interpreter otherwise it would init itself -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19878 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19878] bz2.BZ2File.__init__() cannot be called twice
Nadeem Vawda added the comment: It appears that this *does* affect 2.7 (though not 3.2, 3.3 or 3.4, fortunately): ~/src/cpython/2.7☿ gdb --ex run --args ./python -c 'import bz2; obj = bz2.BZ2File(/dev/null); obj.__init__()' «... snip banner ...» Starting program: /home.u/nadeem/src/cpython/2.7/./python -c import\ bz2\;\ obj\ =\ bz2.BZ2File\(\/dev/null\\)\;\ obj.__init__\(\\\) [Thread debugging using libthread_db enabled] Using host libthread_db library /lib/x86_64-linux-gnu/libthread_db.so.1. Traceback (most recent call last): File string, line 1, in module IOError: [Errno 2] No such file or directory: '' Program received signal SIGSEGV, Segmentation fault. 0x00431d3e in PyFile_DecUseCount (fobj=0x0) at Objects/fileobject.c:89 89 fobj-unlocked_count--; -- assignee: - nadeem.vawda nosy: +nadeem.vawda stage: - needs patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19878 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19878] bz2.BZ2File.__init__() cannot be called twice with non-existent file
Vajrasky Kok added the comment: Here is the preliminary patch. -- keywords: +patch nosy: +vajrasky title: bz2.BZ2File.__init__() cannot be called twice - bz2.BZ2File.__init__() cannot be called twice with non-existent file Added file: http://bugs.python.org/file32965/fix_segfault_in_bz2_init_non_existent_file.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19878 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
