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[NTOS:MM] Disable APC while performing Paged Read

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This commit is contained in:
Jérôme Gardou 2021-01-04 18:26:18 +01:00
parent 02167f2fb3
commit e46f1a9af3
1 changed files with 6 additions and 0 deletions
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6
ntoskrnl/mm/section.c
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@ -1187,6 +1187,7 @@ MiReadPage(PMEMORY_AREA MemoryArea,
PMDL Mdl = (PMDL)MdlBase; PMDL Mdl = (PMDL)MdlBase;
PFILE_OBJECT FileObject = MemoryArea->SectionData.Segment->FileObject; PFILE_OBJECT FileObject = MemoryArea->SectionData.Segment->FileObject;
LARGE_INTEGER FileOffset; LARGE_INTEGER FileOffset;
KIRQL OldIrql;
FileOffset.QuadPart = MemoryArea->SectionData.Segment->Image.FileOffset + SegOffset; FileOffset.QuadPart = MemoryArea->SectionData.Segment->Image.FileOffset + SegOffset;
@ -1203,6 +1204,9 @@ MiReadPage(PMEMORY_AREA MemoryArea,
KeInitializeEvent(&Event, NotificationEvent, FALSE); KeInitializeEvent(&Event, NotificationEvent, FALSE);
/* Disable APCs */
KeRaiseIrql(APC_LEVEL, &OldIrql);
Status = IoPageRead(FileObject, Mdl, &FileOffset, &Event, &IoStatus); Status = IoPageRead(FileObject, Mdl, &FileOffset, &Event, &IoStatus);
if (Status == STATUS_PENDING) if (Status == STATUS_PENDING)
{ {
@ -1215,6 +1219,8 @@ MiReadPage(PMEMORY_AREA MemoryArea,
MmUnmapLockedPages (Mdl->MappedSystemVa, Mdl); MmUnmapLockedPages (Mdl->MappedSystemVa, Mdl);
} }
KeLowerIrql(OldIrql);
if (Status == STATUS_END_OF_FILE) if (Status == STATUS_END_OF_FILE)
{ {
DPRINT1("Got STATUS_END_OF_FILE at offset %I64d for file %wZ.\n", SegOffset, &FileObject->FileName); DPRINT1("Got STATUS_END_OF_FILE at offset %I64d for file %wZ.\n", SegOffset, &FileObject->FileName);