Failure in test_hashlib.py and test_hmac.py

[Chris Lieb]

On Mar 3, 8:33 pm, Chris Lieb <chris.l... at gmail.com> wrote:
> I am building Python 2.6.4 on a shared server and am encountering test
> failures in test_hashlib.py and test_hmac.py, specifically concerning
> sha512.  I recompiled Python with --with-pydebug and CLFAGS=CPPFLAGS="-
> g" and ran the tests in GDB and got the following results:
>
> ----------------------------------------------------------------------------
>
> GNU gdb 6.6.50.20070726-cvs
> Copyright (C) 2007 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "x86_64-suse-linux"...
> Using host libthread_db library "/lib64/libthread_db.so.1".
> (gdb) run test_hashlib.py
> Starting program: /export/users1/chris.lieb/packages/python/bin/
> python2.6 test_hashlib.py
> test_case_md5_0 (__main__.HashLibTestCase) ... ok
> test_case_md5_1 (__main__.HashLibTestCase) ... ok
> test_case_md5_2 (__main__.HashLibTestCase) ... ok
> test_case_md5_huge (__main__.HashLibTestCase) ... ok
> test_case_md5_uintmax (__main__.HashLibTestCase) ... ok
> test_case_sha1_0 (__main__.HashLibTestCase) ... ok
> test_case_sha1_1 (__main__.HashLibTestCase) ... ok
> test_case_sha1_2 (__main__.HashLibTestCase) ... ok
> test_case_sha1_3 (__main__.HashLibTestCase) ... ok
> test_case_sha224_0 (__main__.HashLibTestCase) ... ok
> test_case_sha224_1 (__main__.HashLibTestCase) ... ok
> test_case_sha224_2 (__main__.HashLibTestCase) ... ok
> test_case_sha224_3 (__main__.HashLibTestCase) ... ok
> test_case_sha256_0 (__main__.HashLibTestCase) ... ok
> test_case_sha256_1 (__main__.HashLibTestCase) ... ok
> test_case_sha256_2 (__main__.HashLibTestCase) ... ok
> test_case_sha256_3 (__main__.HashLibTestCase) ... ok
> test_case_sha384_0 (__main__.HashLibTestCase) ... ok
> test_case_sha384_1 (__main__.HashLibTestCase) ... ok
> test_case_sha384_2 (__main__.HashLibTestCase) ... ok
> test_case_sha384_3 (__main__.HashLibTestCase) ... ok
> test_case_sha512_0 (__main__.HashLibTestCase) ... FAIL
> test_case_sha512_1 (__main__.HashLibTestCase) ... FAIL
> test_case_sha512_2 (__main__.HashLibTestCase) ... FAIL
> test_case_sha512_3 (__main__.HashLibTestCase) ... FAIL
> test_hexdigest (__main__.HashLibTestCase) ...
> Program received signal SIGSEGV, Segmentation fault.
> Cannot remove breakpoints because program is no longer writable.
> It might be running in another process.
> Further execution is probably impossible.
> 0x00002ba86ffbb463 in ?? ()
> (gdb) bt
> #0  0x00002ba86ffbb463 in ?? ()
> #1  0x000000000046993d in PyString_FromStringAndSize (
>     str=0x7fff71c67800 " \203 5~︽ T(P m\200\a \005\vW
> \025 \203 ! l G <]
> \205                                                    5
> \203\030 \207~ /c 1 GAz\201 82z ' > x q \177",
> size=1054484473)
>     at Objects/stringobject.c:90
> #2  0x00002ba87030d59a in ?? ()
> #3  0x0000000000000000 in ?? ()
>
> -----------------------------------------------------------------------------------------
>
> GNU gdb 6.6.50.20070726-cvs
> Copyright (C) 2007 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "x86_64-suse-linux"...
> Using host libthread_db library "/lib64/libthread_db.so.1".
> (gdb) run test_hmac.py
> Starting program: /export/users1/chris.lieb/packages/python/bin/
> python2.6 test_hmac.py
> test_legacy_block_size_warnings (__main__.TestVectorsTestCase) ... ok
> test_md5_vectors (__main__.TestVectorsTestCase) ... ok
> test_sha224_rfc4231 (__main__.TestVectorsTestCase) ... ok
> test_sha256_rfc4231 (__main__.TestVectorsTestCase) ... ok
> test_sha384_rfc4231 (__main__.TestVectorsTestCase) ... ok
> test_sha512_rfc4231 (__main__.TestVectorsTestCase) ...
> Program received signal SIGSEGV, Segmentation fault.
> Cannot remove breakpoints because program is no longer writable.
> It might be running in another process.
> Further execution is probably impossible.
> 0x00002b483844e4c7 in ?? ()
> (gdb) bt
> #0  0x00002b483844e4c7 in ?? ()
> #1  0x000000000046993d in PyString_FromStringAndSize (
>     str=0x7ffff84f6730 "\026C3D \235D\t \025 [ G
> \032bGץ ~ \235\t\233aP",
>     size=4108309188) at Objects/stringobject.c:90
> #2  0x00002b48387e159a in ?? ()
> #3  0x0000000000000000 in ?? ()
>
> --------------------------------------------------------------------
>
> In the case of test_hashlib.py, it segfaulted on the first sha512 test
> when I didn't have the debugging options enabled.  Only after enabling
> debugging did I get FAIL's for the sha512 tests.
>
> Does anyone know what is causing these failures?

Does anyone have any tips or insights for trying to debug this issue?
Any help is greatly appreciated.

--
Chris Lieb