rlm_python bug

Valts Mazurs valts at datatechlabs.com
Fri Jun 3 18:02:56 CEST 2005

Vladimir Yu. Stepanov wrote:
> Can you try setup from ports collection of libltdl15
> (/usr/ports/devel/libltdl15) and add some options in configure script
> for freeradius:
> --with-ltdl-include="/usr/local/include" \
> --with-ltdl-lib="/usr/local/lib" \

It was not helpful.
Crashed with core dump when I called "killall radiusd".

gdb bt output:
(gdb) bt
#0  0x280f6b0b in PyType_IsSubtype () from /usr/local/lib/libpython2.4.so
#1  0x2812d800 in PyImport_Cleanup () from /usr/local/lib/libpython2.4.so
#2  0x2813651c in Py_Finalize () from /usr/local/lib/libpython2.4.so
#3  0x0805b160 in free_mainconfig ()
#4  0x08054968 in detach_modules ()
#5  0x0804e135 in main ()

> --with-threads \

enabled by default imho.

> --with-experimental-modules \

It is not neccessary. I use --with-static-modules=python

> --enable-developer

With --enable-developer freeradius server crashes with core dump when
received first request.

gdb bt output:
(gdb) bt
#0  0x28668e2c in rad_mangle (data=0x816aec0, request=0x8091f00)
     at rlm_preprocess.c:186
#1  0x2866922f in preprocess_authorize (instance=0x816aec0,
     at rlm_preprocess.c:497
#2  0x08055ac2 in modcall (component=1, c=0x816ae00, request=0x8091f00)
     at modcall.c:219
#3  0x08055cbf in modcall (component=1, c=0x816af80, request=0x8091f00)
     at modcall.c:252
#4  0x080550fc in indexed_modcall (comp=1, idx=134815488, request=0x8091f00)
     at modules.c:469
#5  0x080527c7 in rad_authenticate (request=0x8091f00) at auth.c:578
#6  0x0804ca26 in rad_respond (request=0x8091f00,
     fun=0x8052738 <rad_authenticate>) at radiusd.c:1672
#7  0x0804e0b4 in main (argc=2, argv=0xbfbfe828) at radiusd.c:1457

NOTE that all these bugs appear only if python module is enabled in
configuration files.

> First two options may be help to fix this bug :)
>> My environment:
>>   FreeBSD 5.3-RELEASE
>>   freeradius-1.0.2
>>   ./configure --with-static-modules=python && make && make install
>>   gcc version 3.4.2 [FreeBSD] 20040728
>>   Python 2.4.1
>>   GNU gdb 6.1.1 [FreeBSD]
>> Valts.
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