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Fix physical memory section creation

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This commit is contained in:
Jérôme Gardou 2020-12-18 16:53:39 +01:00
parent 91f6fa0259
commit 543112008a
1 changed files with 20 additions and 14 deletions
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34
ntoskrnl/mm/section.c
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@ -2068,7 +2068,7 @@ MmCreatePhysicalMemorySection(VOID)
/*
* Create the section mapping physical memory
*/
SectionSize.QuadPart = MmNumberOfPhysicalPages * PAGE_SIZE;
SectionSize.QuadPart = MmHighestPhysicalPage * PAGE_SIZE;
InitializeObjectAttributes(&Obj,
&Name,
OBJ_PERMANENT | OBJ_KERNEL_EXCLUSIVE,
@ -2136,6 +2136,7 @@ MmCreatePhysicalMemorySection(VOID)
if (!NT_SUCCESS(Status))
{
ObDereferenceObject(PhysSection);
return Status;
}
ObCloseHandle(Handle, KernelMode);
@ -3654,16 +3655,17 @@ NtQuerySection(
Sbi.BaseAddress = (PVOID)Section->Address.StartingVpn;
Sbi.Attributes = 0;
if (Section->u.Flags.Commit)
Sbi.Attributes |= SEC_COMMIT;
if (Section->u.Flags.Reserve)
Sbi.Attributes |= SEC_RESERVE;
if (Section->u.Flags.File)
Sbi.Attributes |= SEC_FILE;
if (Section->u.Flags.Image)
Sbi.Attributes |= SEC_IMAGE;
/* FIXME : Complete/test the list of flags passed back from NtCreateSection */
/* Those are not set *************
if (Section->u.Flags.Commit)
Sbi.Attributes |= SEC_COMMIT;
if (Section->u.Flags.Reserve)
Sbi.Attributes |= SEC_RESERVE;
**********************************/
if (Section->u.Flags.Image)
{
@ -4005,8 +4007,9 @@ MmMapViewOfSection(IN PVOID SectionObject,
{
(*ViewSize) = Section->SizeOfSection.QuadPart - ViewOffset;
}
else if (((*ViewSize)+ViewOffset) > Section->SizeOfSection.QuadPart)
else if ((ExGetPreviousMode() == UserMode) && (((*ViewSize)+ViewOffset) > Section->SizeOfSection.QuadPart))
{
/* Dubious */
(*ViewSize) = MIN(Section->SizeOfSection.QuadPart - ViewOffset, SIZE_T_MAX - PAGE_SIZE);
}
@ -4329,8 +4332,16 @@ MmCreateSection (OUT PVOID * Section,
return STATUS_INVALID_PARAMETER_6;
}
/* Did the caller pass a handle? */
if (FileHandle)
/* Did the caller pass a file object ? */
if (FileObject)
{
/* Reference the object directly */
ObReferenceObject(FileObject);
/* We don't create image mappings with file objects */
AllocationAttributes &= ~SEC_IMAGE;
}
else
{
/* Reference the file handle to get the object */
Status = ObReferenceObjectByHandle(FileHandle,
@ -4368,11 +4379,6 @@ MmCreateSection (OUT PVOID * Section,
DPRINT1("Creating image map with writers open on the file!\n");
#endif
}
else
{
/* Reference the object directly */
ObReferenceObject(FileObject);
}
}
else
{