[Bug 23247] hhctrl.ocx - crash when showing HTML help

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=23247





--- Comment #8 from Dmitry Timoshkov <dmitry at codeweavers.com>  2010-06-22 05:28:23 ---
(In reply to comment #7)
> > Did you see my comment to your patch?
> 
> Sure. And I told you it happens in 7-zip. Crash actually happens in your code,
> that is why I fixed it there and not somewhere
> dlls/hhctrl.ocx/chm.c,LoadWinTypeFromCHM().

My code and possibly other parts assume that LoadWinTypeFromCHM() has
initialized all the fields in the CHM header. You need to figure out why
LoadWinTypeFromCHM() fails to do so, and fix it.

> Point is, I don't get why there is
> GetChmString(info->pCHMInfo, (DWORD_PTR)info->WinType.pszCaption) called from
> LoadWinTypeFromCHM when GetChmString accepts DWORD as second argument, not
> DWORD_PTR... and then, why there is (offset >> BLOCK_BITS) shift in
> GetChmString when offset is truncated pointer (?)

How is that related to this bug?

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