Regression: crash upon restart after changing screen resolution in vbox.

Official 41838.
Fresh install to 3rd stage, install guest additions. restart. Change screen resolution to 1024x768x32. Restart -> crash.

(subsystems/win32/csrss/win32csr/exitros.c:776) FIXME: Need to close all user processes!
fixme:(base/system/winlogon/sas.c:651) FIXME: Call SMSS API #1

• • • Fatal System Error: 0x000000c2
      (0x00000060,0x811BC000,0x00000000,0x00000000)

PuTTYEntered debugger on embedded INT3 at 0x0008:0x808c0a3c.
kdb:> bt
Eip:
<NTOSKRNL.EXE:c0a3d (lib/rtl/i386/debug_asm.S:42 (RtlpBreakWithStatusInstruction))>
Frames:
<NTOSKRNL.EXE:6766 (ntoskrnl/ke/bug.c:1088 (KeBugCheckWithTf@24))>
<NTOSKRNL.EXE:6a07 (ntoskrnl/ke/bug.c:1397 (KeBugCheck@4))>
<NTOSKRNL.EXE:74ab1 (ARM³::CONTMEM:352 (MmAllocateContiguousMemorySpecifyCache@32))>
<NTOSKRNL.EXE:74b7c (ARM³::CONTMEM:422 (MmFreeContiguousMemory@4))>
<VBoxVideo.sys:3381>
<VBoxVideo.sys:2a72>
<VBoxVideo.sys:2d26>
<VIDEOPRT.SYS:1e3c (drivers/video/videoprt/dispatch.c:47 (IntVideoPortResetDisplayParameters@8))>
<NTOSKRNL.EXE:46543 (ntoskrnl/inbv/inbv.c:218 (InbvAcquireDisplayOwnership@0))>
<NTOSKRNL.EXE:3bf91 (ntoskrnl/ex/shutdown.c:143 (ShutdownThreadMain@4))>
<NTOSKRNL.EXE:ae8a1 (ntoskrnl/ps/thread.c:159 (PspSystemThreadStartup@8))>
<NTOSKRNL.EXE:b882a (ntoskrnl/ke/i386/ctxswitch.S:306 (KiThreadStartup@156))>
kdb:>
Eip:
<NTOSKRNL.EXE:c0a3d (lib/rtl/i386/debug_asm.S:42 (RtlpBreakWithStatusInstruction))>
Frames:
<NTOSKRNL.EXE:6766 (ntoskrnl/ke/bug.c:1088 (KeBugCheckWithTf@24))>
<NTOSKRNL.EXE:6a07 (ntoskrnl/ke/bug.c:1397 (KeBugCheck@4))>
<NTOSKRNL.EXE:74ab1 (ARM³::CONTMEM:352 (MmAllocateContiguousMemorySpecifyCache@32))>
<NTOSKRNL.EXE:74b7c (ARM³::CONTMEM:422 (MmFreeContiguousMemory@4))>
<VBoxVideo.sys:3381>
<VBoxVideo.sys:2a72>
<VBoxVideo.sys:2d26>
<VIDEOPRT.SYS:1e3c (drivers/video/videoprt/dispatch.c:47 (IntVideoPortResetDisplayParameters@8))>
<NTOSKRNL.EXE:46543 (ntoskrnl/inbv/inbv.c:218 (InbvAcquireDisplayOwnership@0))>
<NTOSKRNL.EXE:3bf91 (ntoskrnl/ex/shutdown.c:143 (ShutdownThreadMain@4))>
<NTOSKRNL.EXE:ae8a1 (ntoskrnl/ps/thread.c:159 (PspSystemThreadStartup@8))>
<NTOSKRNL.EXE:b882a (ntoskrnl/ke/i386/ctxswitch.S:306 (KiThreadStartup@156))>
kdb:>