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[NTOSKRNL:MM]

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- Do not assume all zeroes in PE sections that contain uninitialized data. Such sections can have other contents as well, and MiReadPage already provides zeroes for outside-of-file data anyway
CORE-6958 #resolve

svn path=/trunk/; revision=58344
This commit is contained in:
Thomas Faber 2013-02-20 21:48:05 +00:00
parent b54fb9d65e
commit 1877afb7da
1 changed files with 3 additions and 48 deletions
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51
reactos/ntoskrnl/mm/section.c
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@ -677,6 +677,7 @@ l_ReadHeaderFromFile:
pssSegments[i].Length.QuadPart = pishSectionHeaders[i].Misc.VirtualSize;
pssSegments[i].Length.LowPart = ALIGN_UP_BY(pssSegments[i].Length.LowPart, nSectionAlignment);
/* FIXME: always false */
if (pssSegments[i].Length.QuadPart < pssSegments[i].Length.QuadPart)
DIE(("Cannot align the virtual size of section %u\n", i));
@ -1393,52 +1394,6 @@ MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
return(STATUS_SUCCESS);
}
/*
* Map anonymous memory for BSS sections
*/
if (Segment->Image.Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
{
/* We'll be unlocking the address space below. Prevent us from being preempted
* in faulting in the page. */
MmCreatePageFileMapping(Process, Address, MM_WAIT_ENTRY);
MmUnlockSectionSegment(Segment);
MI_SET_USAGE(MI_USAGE_SECTION);
if (Process) MI_SET_PROCESS2(Process->ImageFileName);
if (!Process) MI_SET_PROCESS2("Kernel Section");
Status = MmRequestPageMemoryConsumer(MC_USER, FALSE, &Page);
if (!NT_SUCCESS(Status))
{
MmUnlockAddressSpace(AddressSpace);
Status = MmRequestPageMemoryConsumer(MC_USER, TRUE, &Page);
MmLockAddressSpace(AddressSpace);
}
if (!NT_SUCCESS(Status))
{
KeBugCheck(MEMORY_MANAGEMENT);
}
/* Remove the wait entry we placed, so that we can map the page */
MmDeletePageFileMapping(Process, PAddress, &SwapEntry);
Status = MmCreateVirtualMapping(Process,
PAddress,
Region->Protect,
&Page,
1);
if (!NT_SUCCESS(Status))
{
DPRINT("MmCreateVirtualMapping failed, not out of memory\n");
KeBugCheck(MEMORY_MANAGEMENT);
return(Status);
}
MmInsertRmap(Page, Process, Address);
/*
* Cleanup and release locks
*/
MiSetPageEvent(Process, Address);
DPRINT("Address 0x%.8X\n", Address);
return(STATUS_SUCCESS);
}
/*
* Get the entry corresponding to the offset within the section
*/
@ -1508,7 +1463,7 @@ MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
MmUnlockSectionSegment(Segment);
MmDeletePageFileMapping(Process, PAddress, &FakeSwapEntry);
DPRINT("CreateVirtualMapping Page %x Process %p PAddress %p Attributes %x\n",
DPRINT("CreateVirtualMapping Page %x Process %p PAddress %p Attributes %x\n",
Page, Process, PAddress, Attributes);
Status = MmCreateVirtualMapping(Process,
PAddress,
@ -2058,7 +2013,7 @@ MmPageOutSectionView(PMMSUPPORT AddressSpace,
Address);
KeBugCheckEx(MEMORY_MANAGEMENT, SwapEntry, Page, (ULONG_PTR)Process, (ULONG_PTR)Address);
}
MmReleasePageMemoryConsumer(MC_USER, Page);
MmReleasePageMemoryConsumer(MC_USER, Page);
MiSetPageEvent(NULL, NULL);
return(STATUS_SUCCESS);
}