[pypy-issue] [issue1430] Memory corruption on socket.gethostbyname_ex

[Vasily Evseenko]

New submission from Vasily Evseenko <svpcom at gmail.com>:

There are some memory corruption while calling socket.gethostbyname_ex
from the thread while other thread executes JIT'ed code:
In such case socket.gethostbyname_ex returns random entries from
/etc/hosts instead of DNS lookup.

Notes from dev-list:
---
- it reproduces even without a JIT-enabled pypy
- PyPy uses gethostbyname() instead of gethostbyname_r()
---

Affected versions: PyPy 1.8, 1.9, 2.0b1 on Linux   (Fedora 16, Debian
GNU/Linux 6.0)
---
Python 2.7.3 (07e08e9c885ca67d89bcc304e45a32346daea2fa, Mar 19 2013,
07:39:19)
[PyPy 2.0.0-beta1 with GCC 4.4.5] on linux2

Python 2.7.3 (07e08e9c885ca67d89bcc304e45a32346daea2fa, Dec 18 2012,
05:33:54)
[PyPy 2.0.0-beta1 with GCC 4.6.3] on linux2

Python 2.7.2 (2346207d99463f299f09f3e151c9d5fa9158f71b, May 15 2012,
11:08:08)
[PyPy 1.8.0 with GCC 4.6.3] on linux2

Python 2.7.2 (341e1e3821fff77db3bb5cdb7a4851626298c44e, Oct 23 2012,
11:37:42)
[PyPy 1.9.0 with GCC 4.6.3] on linux2
---

Not affected: PyPy 2.0b1 on MacOSX
---
Python 2.7.3 (07e08e9c885ca67d89bcc304e45a32346daea2fa, Mar 19 2013,
07:52:27)
[PyPy 2.0.0-beta1] on darwin

Python 2.7.3 (7e4f0faa3d51, Nov 21 2012, 15:59:46)
[PyPy 2.0.0-beta1 with GCC 4.2.1] on darwin
---

----------
files: test.py
messages: 5489
nosy: pypy-issue, svpcom
priority: critical
release: 2.0
status: unread
title: Memory corruption on socket.gethostbyname_ex

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PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1430>
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