[ ijbswa-Bugs-3484388 ] img-reorder hangs on large data: URI images

Bugs item #3484388, was opened at 2012-02-04 08:43
Message generated for change (Comment added) made by fabiankeil
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Category: funct: filtering
Group: None
>Status: Pending
Resolution: None
Priority: 5
Private: No
Submitted By: Incognito (iloppi)
>Assigned to: Fabian Keil (fabiankeil)
Summary: img-reorder hangs on large data: URI images

Initial Comment:
img-reorder filter hangs (or takes a very long time (core at 100%)) on pages with large in-line data: URI images using data: URI scheme.
Example: http://dopiaza.org/tools/datauri/data-uri-examples/
Tested on 3.0.19 on Windows 7 64bit.

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>Comment By: Fabian Keil (fabiankeil)
Date: 2012-02-08 05:56

Message:
Thanks for the report.

It looks like more recent PCRE versions already "solve" this with the
internal match limit:
14:53:42.869 029 Error: Skipped filter 'privoxy-filter-test' after job
number 5: (pcre:) Match limit reached (-8)

Unfortunately we can't rely on a more recent PCRE version being available,
so I'll look into this.

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Comment By: Incognito (iloppi)
Date: 2012-02-04 09:20

Message:
Upon further testing, banners-by-size has similar problems with large
enough images.

Easy solution would be to put some reasonable limits on the match size in
the regexps.

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