Bugs item #1697916, was opened at 2007-04-10 19:47 Message generated for change (Comment added) made by gbrandl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1697916&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.5 >Status: Open Resolution: None Priority: 6 Private: No Submitted By: STINNER Victor (haypo) >Assigned to: Georg Brandl (gbrandl) Summary: Segfaults on memory error Initial Comment: Hi, I'm playing with resource.setrlimit(resource.RLIMIT_AS) to limit memory usage during fuzzing tests. It works quite well but Python crashs sometimes (with SEGFAULT). I downloaded Python source code and recompiled it with EXTRA_FLAGS="-g -O0" to find errors. I found three bugs and wrote a patch for all of them. Comments: * Objects/exceptions.c:33: allocation may returns NULL on memory error * Objects/longobject.c:2511: long_divrem() may allocate new long integers but l_divmod() doesn't check that div and mod are not NULL * Objects/object.c:1284: problem with NULL mro. I don't understand how mro works, but I think that the error may be catched when mro is assigned. Problem: where is it done? in Objects/typeobject.c? So don't apply my patch directly: fix for object.c may be wrong. ---------------------------------------------------------------------- >Comment By: Georg Brandl (gbrandl) Date: 2007-04-11 20:11 Message: Logged In: YES user_id=849994 Originator: NO Reopening until I can backport this to the 2.5 branch. ---------------------------------------------------------------------- Comment By: STINNER Victor (haypo) Date: 2007-04-11 16:53 Message: Logged In: YES user_id=365388 Originator: YES Ignore my bug about NULL mro since i'm not able to reproduce it. Thanks for the 3 other fixes ;-) ---------------------------------------------------------------------- Comment By: Georg Brandl (gbrandl) Date: 2007-04-11 16:11 Message: Logged In: YES user_id=849994 Originator: NO Status update: Fixed the first two bugs locally, and a third one discovered by Victor on #python-dev. The mro one is unclear -- we've asked him to reproduce it and poke around in gdb to see why tp_mro is NULL, which it shouldn't be. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1697916&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
