[ros-bugs] [Bug 4423] Firefox: image corruption and crash in win32k in DIB_ColorFill()

[ReactOS.Bugzilla at reactos.org]

http://www.reactos.org/bugzilla/show_bug.cgi?id=4423





--- Comment #4 from hto <hto at dev.null>  2009-07-31 19:26:39 CET ---
> I tried to get it with a testcase calling most
> combinations of invalid parameters (BitBlt/PATCOPY),
> but don't get it on VirtualBox in any case.

Here is some information about this crash.

NtGdiPatBlt() called as NtGdiPatBlt(..., 2, 2, 162, 1, 0xf00021).

In BltPatCopy() Dest = { ..., ..., ..., ..., { 800, 600 }, 0x1d4c00,
0xfc91e000, 0xfc91e000, 3200, 0, BMF_32BPP, 0, 1 }, DestRect = { -31998,
-31998, -31836, -31997 }, pbo->iSolidColor = 0xd4d0c8.

Memory at 0xF6758508 could not be written: Page not present.

NtGdiPatBlt ......... objects/bitblt.c:1108
IntPatBlt ........... objects/bitblt.c:993
IntEngBitBltEx ...... eng/bitblt.c:626
EngBitBlt ........... eng/bitblt.c:456
BltPatCopy .......... eng/bitblt.c:158
DIB_32BPP_ColorFill . dib/i386/dib32bpp_colorfill.s:64


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