Issue 25463: 2.7.10 glibc double free detected (original) (raw)

Created on 2015-10-22 21:08 by wcolburnnrao, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (6)
msg253354 - (view)	Author: William D Colburn (wcolburnnrao)	Date: 2015-10-22 21:08
Linking cython against the static libpython in a python install compiled with shared libraries causes a glibc error that a double free or corruption was found while importing site. I don't think it is cython's fault. Happens on RHEL6.6. Linux anotheruvula 2.6.32-504.30.3.el6.x86_64 #1 SMP Thu Jul 9 15:20:47 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11) I am attaching a shell script which demonstrates the problem.
msg253355 - (view)	Author: William D Colburn (wcolburnnrao)	Date: 2015-10-22 21:23
I don't see the shell script attached anywhere. I'll just paste it here! -----cut here----- PYDEST=`pwd` wget https://www.python.org/ftp/python/2.7.10/Python-2.7.10.tgz wget http://cython.org/release/Cython-0.23.4.tar.gz rm -rf Python-2.7.10 Cython-0.23.4 PYDEST/pybugtarxvfPython−2.7.10.tgzcdPython−2.7.10LDRUNPATH={PYDEST}/pybug tar xvf Python-2.7.10.tgz cd Python-2.7.10 LD_RUN_PATH=PYDEST/pybugtarxvfPython−2.7.10.tgzcdPython−2.7.10LDRUNPATH=PYDEST/pybug/lib:$LD_LIBRARY_PATH export LD_RUN_PATH ./configure --prefix=$PYDEST/pybug --enable-shared make -j 8 make install prefix=$PYDEST/pybug cd .. tar xvf Cython-0.23.4.tar.gz cd Cython-0.23.4 PYDEST/pybug/bin/python2.7setup.pyinstallcd..cat>crash.py<<EOFprint′helloworld′EOFPYDEST/pybug/bin/python2.7 setup.py install cd .. cat > crash.py <<EOF print 'hello world' EOF PYDEST/pybug/bin/python2.7setup.pyinstallcd..cat>crash.py<<EOFprint′helloworld′EOF{PYDEST}/pybug//bin/cython --embed crash.py gcc -g crash.c -I${PYDEST}/pybug/include/python2.7 ${PYDEST}/pybug/lib/python2.7/config/libpython2.7.a -lm -ldl -lutil -lpthread -o doublefree ## ## *** glibc detected *** ./doublefree: double free or corruption (out): 0x00007f57fb8c5030 *** ## crashes in PyInitialize() during "import site" ## ./doublefree
msg257242 - (view)	Author: William D Colburn (wcolburnnrao)	Date: 2015-12-30 22:39
I tried the test with Python 2.7.11, and it still crashes.
msg257254 - (view)	Author: Amaury Forgeot d'Arc (amaury.forgeotdarc) *	Date: 2015-12-31 11:02
I don't reproduce the crash, but I noticed that the binary imports and executes the system's /usr/lib/python2.7/site.py. I think it's cython's fault (or maybe the way you use it): "cython --embed" is not really isolated from the rest of the system, so it can only be used with the system's Python.
msg257256 - (view)	Author: William D Colburn (wcolburnnrao)	Date: 2015-12-31 15:02
wcolburn@anotheruvula</home/anotheruvula/python/debug>$ strace doublefree 2>&1 | grep site.py open("/home/anotheruvula/python/debug/pybug/lib/python2.7/site.py", O_RDONLY) = 3 open("/home/anotheruvula/python/debug/pybug/lib/python2.7/site.pyc", O_RDONLY) = 4 *** glibc detected *** doublefree: double free or corruption (out): 0x00007fa1eb491030 *** ======= Backtrace: ========= It's pulling in it's own site.py, not the system site.py when I do it.
msg367347 - (view)	Author: Zachary Ware (zach.ware) *	Date: 2020-04-27 01:50
As Python 2.7 is now at end-of-life, I'm closing this issue. If you can still reproduce the problem with a modern version of Python (3.6-3.8), please reopen it.