Hello,
I can reproduce a DRIVER_IRQL_NOT_LESS_OR_EQUAL BSOD on my host (Windows 7 64
bit SP1), using a debug build of VirtualBox svn44137, while a guest is booting
(Windows 7 64 bit SP1, unpatched, 2 CPUs). It is caused by the code line:
VMMR0!pgmPhysAllocLargePage
[c:\work_x64\vbox\src\vbox\vmm\vmmall\pgmallphys.cpp @ 749], which is:
LogFlow(("Found page %RGp with wrong attributes (type=%d; state=%d); cancel
check. rc=%d\n", GCPhys, PGM_PAGE_GET_TYPE(pSubPage),
PGM_PAGE_GET_STATE(pSubPage), rc));
At that code context, rc is set to VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS,
pSubPage is set to NULL (set by pgmPhysGetPageExSlow()). No check is done to
prevent PGM_PAGE_GET_TYPE from dereferencing the null pointer. I can provide a
kernel minidump, if needed.
Thank you,
Mihai
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