[okular] [Bug 349526] Okular crashes opening CHM-file

[Peter Wu]

https://bugs.kde.org/show_bug.cgi?id=349526

Peter Wu <peter at lekensteyn.nl> changed:

           What    |Removed                     |Added
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                 CC|                            |peter at lekensteyn.nl

--- Comment #4 from Peter Wu <peter at lekensteyn.nl> ---
Created attachment 114661
  --> https://bugs.kde.org/attachment.cgi?id=114661&action=edit
ASAN trace (qt5-base 5.11.1, khtml 5.49.0, okular v18.08.0-21-g6a3705535)

I cannot load the referenced mydac.chm file as it takes forever to even open
and spits libpng errors. However I did observe a crash when trying to open a
(confidential) CHM file and scrolling down to a page, the cause of the crash is
a use-after-free of a scrollbar widget.

The page I scroll to contains a larger picture, that could be relevant. I was
not able to reproduce the crash with a (text-only?) "depends.chm" from 2011
(Dependency Walker).

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