[ python-Bugs-1344508 ] UNIX mmap leaks file descriptors

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Tue Nov 1 04:46:21 CET 2005


Bugs item #1344508, was opened at 2005-11-01 03:46
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Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Erwin S. Andreasen (drylock)
Assigned to: Nobody/Anonymous (nobody)
Summary: UNIX mmap leaks file descriptors

Initial Comment:
The commit from 2.49 to 2.50 in Modules/mmapmodule.c
has made mmap under UNIX leak a file descriptor:

-       m_obj->fd = fd;
+       m_obj->fd = dup(fd);

The FD given is dup'ed in order to allow ftruncation
later, but no close of it is done in dealloc/close.

A test case attached, using lsof after some
mmaps/unmaps to show leak.

Version:

Python 2.4.2 (#2, Sep 29 2005, 00:23:59) 
[GCC 4.0.2 (Debian 4.0.1-9)] on linux2


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