[New-bugs-announce] [issue20866] segfailt with os.popen and SIGPIPE

[Hanno Boeck]

New submission from Hanno Boeck:

I experience a segmentation fault with python 2.7 (both 2.7.5 and 2.7.6 tested on Ubuntu and Gentoo) when a large file is piped, the pipe is passed to os.popen and the process sends a SIGPIPE signal.

To create an easy to reproduce testcase grep can be used. See example attached.

To test first create a dummy file containing zeros, around 1 megabyte is enough:
for i in `seq 1 100000`; do echo "0123456789" >> dummy.txt; done

Then pipe it to the script attached like this:
cat dummy.txt | python2 minimal.py

Result is a Segmentation fault. The same code doesn't segfault with python 3.

----------
components: Interpreter Core
files: sigpipe_crash.py
messages: 212897
nosy: hanno
priority: normal
severity: normal
status: open
title: segfailt with os.popen and SIGPIPE
type: crash
versions: Python 2.7
Added file: http://bugs.python.org/file34301/sigpipe_crash.py

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20866>
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