Re: [xml] Nasty DTD parsing bug (IO buffering, perhaps?)

[Daniel Veillard <veillard redhat com>]

On Wed, Feb 07, 2007 at 03:20:38PM +1100, Michael Day wrote:
> Hi,
>
> Here is a DTD parsing bug in libxml2 (tested with 2.6.27).
>
> Download the following .tar.gz:
>
>      http://www.princexml.com/download/nasty-libxml2-dtd-bug.tar.gz
>
> Unpack it and run:
>
>      $ xmllint --loaddtd bug.xml
>
> You will get lots of error messages, the first one being:
>
>      nlm/references.ent:381: parser error : Comment not terminated
>
> However if you look at the file, you will see that is nonsense, and 
> there are no unterminated comments on line 381.
>
> Even worse, if you delete *one character* from the references.ent file 
> at *any point* before line 381, then everything works fine!
>
> This appears to be some kind of IO buffering error or something like 
> that, as the parser seems to be dependent on how many characters are in 
> the file before that point.

  Probably a missing GROW somewhere in the DTD parsing code, please bugzilla
I can't debugs this ATM,

  thanks,

Daniel

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