[Python-Dev] Py2.4 _sre uses uninitialised memory (Bug 1088891)

[Andrew McNamara]

_sre.c, data_stack_grow() in Py2.4 uses realloc()'ed memory without
initialising the newly allocated memory. For complex regexps that require
additional sre stack space, this ultimately results in a core dump or
corrupted heap. Filling the newly allocated memory with 0x55 makes the
problem more obvious (dies on a reference to 0x55555558) for me.

See bug ID 1088891:

    http://sourceforge.net/tracker/index.php?func=detail&aid=1088891&group_id=5470&atid=105470

Can I be the only person who crafts diabolical regexps? Here, have a
lend of my brown paper bag...

-- 
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/