Hi, Troubleshooting this bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=122304 I found something that could be a problem on x86_64 for python: try this on x86_64: foo='www.redhat.com' foo.encode("idna") depending on your encoding that's set you'll get either the correct: www.redhat.com or www.redhat..om we look on line 6 of /usr/lib64/python2.3/encodings/idna.py at: dots = re.compile(u"[\u002E\u3002\uFF0E\uFF61]") that works great on x86 - so a little further down on line 153 you see: labels = dots.split(input) the input in this question is like the url above. so try this bit of code on your own x86_64 python 2.3.3 system: import re dots = re.compile(u"[\u002E\u3002\uFF0E\uFF61]") foo = 'www.redhat.com' labels = dots.split(foo) print labels you'll find it is: Hi, Troubleshooting this bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=122304 I found something that could be a problem on x86_64 for python: try this on x86_64: foo='www.redhat.com' foo.encode("idna") depending on your encoding that's set you'll get either the correct: www.redhat.com or www.redhat..om we look on line 6 of /usr/lib64/python2.3/encodings/idna.py at: dots = re.compile(u"[\u002E\u3002\uFF0E\uFF61]") that works great on x86 - so a little further down on line 153 you see: labels = dots.split(input) the input in this question is like the url above. so try this bit of code on your own x86_64 python 2.3.3 system: import re dots = re.compile(u"[\u002E\u3002\uFF0E\uFF61]") foo = 'www.redhat.com' labels = dots.split(foo) print labels you'll find it is: ['www.redhat.', 'om'] while on x86 it is: ['www', 'redhat', 'com'] which is correct - 3 label sections from rfc 3490 so I went looking for the problem a little bit and found in _sre.c #if defined(MS_WIN64) || defined(__LP64__) || defined(_LP64) /* require smaller recursion limit for a number of 64-bit platforms: * Win64 (MS_WIN64), Linux64 (__LP64__), Monterey (64-bit AIX) (_LP64) */ /* FIXME: maybe the limit should be 40000 / sizeof(void*) ? */ #define USE_RECURSION_LIMIT 7500 I'm wondering if that FIXME is accurate - I've not tested the change yet but it seems like a potential problem for regexes like this - or more to the point anything using the HTTPHandler in python. Can someone more experienced at python _sre internals take a look at this? This will most likely effect up2date, yum, and many network-interacting python applications using http. Thanks -sv
