https://git.reactos.org/?p=reactos.git;a=commitdiff;h=df25e4e79109a785b4be4971081af11573e44259
commit df25e4e79109a785b4be4971081af11573e44259
Author: Jérôme Gardou <jerome.gar...@reactos.org>
AuthorDate: Fri Nov 2 18:23:16 2018 +0100
Commit: Jérôme Gardou <zefk...@users.noreply.github.com>
CommitDate: Sat Nov 3 12:50:16 2018 +0100
[NTOS/MM] Properly handle page faults in regions marked with
PAGE_NOACCESS or PAGE_GUARD
ROSTESTS-110
---
ntoskrnl/mm/section.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/ntoskrnl/mm/section.c b/ntoskrnl/mm/section.c
index 4a03514f00..298fc5f0f9 100644
--- a/ntoskrnl/mm/section.c
+++ b/ntoskrnl/mm/section.c
@@ -1410,6 +1410,29 @@ MmNotPresentFaultSectionView(PMMSUPPORT AddressSpace,
&MemoryArea->Data.SectionData.RegionListHead,
Address, NULL);
ASSERT(Region != NULL);
+
+ /* Check for a NOACCESS mapping */
+ if (Region->Protect & PAGE_NOACCESS)
+ {
+ return STATUS_ACCESS_VIOLATION;
+ }
+
+ if (Region->Protect & PAGE_GUARD)
+ {
+ /* Remove it */
+ Status = MmAlterRegion(AddressSpace,
(PVOID)MA_GetStartingAddress(MemoryArea),
+ &MemoryArea->Data.SectionData.RegionListHead,
+ Address, PAGE_SIZE, Region->Type, Region->Protect &
~PAGE_GUARD,
+ MmAlterViewAttributes);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Removing PAGE_GUARD protection failed : 0x%08x.\n",
Status);
+ }
+
+ return STATUS_GUARD_PAGE_VIOLATION;
+ }
+
/*
* Lock the segment
*/
