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Created on 2005-09-20 14:10 by rozhnov, last changed 2022-04-11 14:56 by admin. This issue is now closed.
| Files | ||||
|---|---|---|---|---|
| File name | Uploaded | Description | Edit | |
| crash.py | rozhnov, 2005-09-20 14:10 | this script crash python | ||
| expat-crash.patch | nnorwitz, 2005-11-12 20:53 | fix attempt 1 | ||
| Messages (7) | |||
|---|---|---|---|
| msg26336 - (view) | Author: Mike Rozhnov (rozhnov) | Date: 2005-09-20 14:10 | |
This simple script crash python. Parsing of commented xml string work good. (i.e. raised exception not crash python) Buffer overflow during convertion to unicode? Tested on Win XP and linux with kernel 2.4 with same results. |
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| msg26337 - (view) | Author: Neal Norwitz (nnorwitz) *  |
Date: 2005-09-22 21:54 | |
Logged In: YES
user_id=33168
I can reproduce on Linux with current CVS and expat
1.95.5-2. Note the size of the data only needs to be
greater than 1024.
xml = "<?xml version='1.0' encoding='iso8859'?><s>%s</s>" %
('a' * 1025)
I am not certain this problem is specific to Python. It
might be down in expat only. Need to investigate further.
|
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| msg26338 - (view) | Author: Fredrik Lundh (effbot) * |
Date: 2005-11-12 11:05 | |
Logged In: YES user_id=38376 Works for me under 2.3.2 (with expat 1.95.6) and 2.4.1 (with expat 1.95.8). Try upgrading your expat and see if the problem goes away. |
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| msg26339 - (view) | Author: Neal Norwitz (nnorwitz) * |
Date: 2005-11-12 20:53 | |
Logged In: YES user_id=33168 I had recently upgraded to expat 1.95.8, so I was hopeful. But it still crashed for me on linux. I did get a better stack trace which allowed me to come up with a patch that solves the problem and passes all the tests. The patch seems a bit odd and I think there might be another problem going on here. It would be great if someone more familiar with xmlparse could take a look at the patch and figure out if it's right or not. |
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| msg26340 - (view) | Author: Brett Cannon (brett.cannon) * |
Date: 2006-06-30 01:33 | |
Logged In: YES user_id=357491 Still seems to be failing even with the Expat 2.0 upgrade in HEAD. |
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| msg26341 - (view) | Author: Brett Cannon (brett.cannon) * |
Date: 2006-06-30 18:06 | |
Logged In: YES user_id=357491 The fault is with Expat and not us. I have submitted a bug report with a possible patch at http://sourceforge.net/tracker/index.php?func=detail&aid=1515266&group_id=10127&atid=110127 . I don't know what their turn-around time will be with this so I will email python-dev to see how long people want to wait on the Expat developers before we just push our own patch for this. |
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| msg26342 - (view) | Author: Fred Drake (fdrake) |
Date: 2006-07-01 16:33 | |
Logged In: YES user_id=3066 This is now fixed in the Expat CVS with lib/xmlparse.c revisions 1.154 and 1.155. I've merged these into the Expat bundled with Python in revision 47191 (on the trunk), and moved the crasher test into the tests for xml.parsers.expat. I don't know when the next Expat release will go out yet, but this will keep us from being dependent on that schedule. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:56:13 | admin | set | github: 42389 |
| 2005-09-20 14:10:03 | rozhnov | create | |