[Bug 12964] Phantasy Star Online Blue Burst ( psobb ) crashes

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=12964

--- Comment #144 from Furyhunter <furyhunter600 at gmail.com> ---
Okay, PSOBB is doing everything it should be doing when loading mips. I was
just misunderstanding the logs. Somehow it is clobbering the memory around the
pBits received from IDirect3DTexture8_LockRect, which is causing the lpVtbl of
the underlying surface interface to become corrupt. I hacked a fix to restore
the lpVtbl, but the corruption runs all the way into the struct
wined3d_resource associated with the surface and overrides the resource_ops,
causing another function pointer call into non-executable memory when unmapping
the resource.

For some reason, PSOBB thinks it's getting more memory than it actually is to
write texture information at this specific point during loading, and it is
writing either before or after the pBits it was given.

Is it possible this is a texture format bug? I'm not sure what to do from here,
but I will keep looking into it.

"very simple fix," famous last words...

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