[Bug 38400] Files fail to save and open in BDCraft Cubik Lite/Pro

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=38400

--- Comment #11 from Bruno Jesus <00cpxxx at gmail.com> ---
(In reply to Dmitry Timoshkov from comment #10)
> It's a bug in the application, it works by a pure luck under Windows.
> 
> The app passes a not initialized ofn->lpstrFileTitle to GetSaveFileNameW().
> Basically ofn->lpstrFileTitle points to the stack approximately 428 bytes
> above the current stack pointer, and since Wine's GetSaveFileNameW() uses
> more than 4096 bytes one of internal stack frames is guaranteed to be trashed
> after copying file name to ofn->lpstrFileTitle.

Same as bug 35200 then, at least I remember seeing a similar issue there and I
attempted to create a patch [1] in order to mitigate the situation by checking
how close the pointer is to the struct. But my tests on Windows led to crashes
proving it would also overwrite the bad memory pointer, as you say it works by
pure luck.

[1] https://bugs.winehq.org/attachment.cgi?id=52622&action=diff

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