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[NTOSKRNL:CC] Bug Fix

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This commit is contained in:
Dibyamartanda Samanta 2024-05-25 09:42:40 +02:00
parent 5a5ebcae89
commit 785ff4b644
1 changed files with 25 additions and 13 deletions
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38
NTOSKRNL/CC/ccinternal.hpp
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@ -10,39 +10,51 @@
#include <ntoskrnl.hpp> #include <ntoskrnl.hpp>
BOOL BOOLEAN NTAPI IsGoToNextMap(IN PSHARED_CACHE_MAP SharedMap, IN ULONG TargetPages)
NTAPI
IsGoToNextMap(IN PSHARED_CACHE_MAP SharedMap, IN ULONG TargetPages)
{ {
BOOLEAN Skip = FALSE; BOOLEAN Skip = FALSE;
if (SharedMap->Flags & (0x20 | 0x800)) // If the map is marked for teardown or modified without writing, return TRUE
if (SharedMap->Flags & (SHARE_FL_WAITING_TEARDOWN | SHARE_FL_MODIFIED_NO_WRITE)) {
return TRUE; return TRUE;
}
if ((SharedMap->OpenCount || SharedMap->DirtyPages) && SharedMap->FileSize.QuadPart) // Determine if we should skip based on open count and dirty pages
{ if ((SharedMap->OpenCount || SharedMap->DirtyPages) && SharedMap->FileSize.QuadPart != 0) {
Skip = TRUE; Skip = TRUE;
} }
if (!SharedMap->DirtyPages && Skip) // Skip if no dirty pages but `Skip` is `TRUE`
if (!SharedMap->DirtyPages && Skip) {
return TRUE; return TRUE;
}
if (SharedMap->Flags & SHARE_FL_WAITING_TEARDOWN) // If the map is waiting for teardown, return FALSE
if (SharedMap->Flags & SHARE_FL_WAITING_TEARDOWN) {
return FALSE; return FALSE;
}
if (!TargetPages && Skip) // Skip if no target pages and `Skip` is `TRUE`
if (TargetPages == 0 && Skip) {
return TRUE; return TRUE;
}
// Increment the lazy write pass count
SharedMap->LazyWritePassCount++; SharedMap->LazyWritePassCount++;
if ((SharedMap->LazyWritePassCount & 0xF) && (SharedMap->Flags & SHARE_FL_MODIFIED_NO_WRITE) && // Skip based on lazy write pass count and other conditions
CcCapturedSystemSize != MmSmallSystem && SharedMap->DirtyPages < 0x40 && Skip) if ((SharedMap->LazyWritePassCount & 0xF) &&
(SharedMap->Flags & SHARE_FL_MODIFIED_NO_WRITE) &&
CcCapturedSystemSize != MmSmallSystem &&
SharedMap->DirtyPages < 0x40 && Skip)
{ {
return TRUE; return TRUE;
} }
if ((SharedMap->FileObject->Flags & 0x8000) && SharedMap->OpenCount && // Skip if file object is marked for direct I/O and other conditions
CcCanIWrite(SharedMap->FileObject, 0x40000, 0, 0xFF) && Skip) if ((SharedMap->FileObject->Flags & FO_DIRECT_IO) &&
SharedMap->OpenCount != 0 &&
CcCanIWrite(SharedMap->FileObject, 0x40000, FALSE, 0xFF) && Skip)
{ {
return TRUE; return TRUE;
} }