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[NTOSKRNL] Add extra sanity checks for VACB lists.

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We now always initialize list members from the VACB
and make sure the list entry has properly been removed
from the list before free.

CORE-14349
This commit is contained in:
Pierre Schweitzer 2018-04-08 18:34:00 +02:00
parent b54e5c689c
commit 42df4683d7
2 changed files with 13 additions and 2 deletions
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2
ntoskrnl/cc/fs.c
View file

@ -238,6 +238,7 @@ CcPurgeCacheSection (
/* This VACB is in range, so unlink it and mark for free */
ASSERT(Refs == 1 || Vacb->Dirty);
RemoveEntryList(&Vacb->VacbLruListEntry);
InitializeListHead(&Vacb->VacbLruListEntry);
if (Vacb->Dirty)
{
CcRosUnmarkDirtyVacb(Vacb, FALSE);
@ -253,6 +254,7 @@ CcPurgeCacheSection (
Vacb = CONTAINING_RECORD(RemoveHeadList(&FreeList),
ROS_VACB,
CacheMapVacbListEntry);
InitializeListHead(&Vacb->CacheMapVacbListEntry);
CcRosVacbDecRefCount(Vacb);
CcRosInternalFreeVacb(Vacb);
}

13
ntoskrnl/cc/view.c
View file

@ -375,6 +375,7 @@ retry:
RemoveEntryList(&current->CacheMapVacbListEntry);
RemoveEntryList(&current->VacbLruListEntry);
InitializeListHead(&current->VacbLruListEntry);
InsertHeadList(&FreeList, &current->CacheMapVacbListEntry);
/* Calculate how many pages we freed for Mm */
@ -413,6 +414,7 @@ retry:
current = CONTAINING_RECORD(current_entry,
ROS_VACB,
CacheMapVacbListEntry);
InitializeListHead(&current->CacheMapVacbListEntry);
CcRosVacbDecRefCount(current);
CcRosInternalFreeVacb(current);
}
@ -567,6 +569,7 @@ CcRosUnmarkDirtyVacb (
Vacb->Dirty = FALSE;
RemoveEntryList(&Vacb->DirtyVacbListEntry);
InitializeListHead(&Vacb->DirtyVacbListEntry);
CcTotalDirtyPages -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
Vacb->SharedCacheMap->DirtyPages -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
CcRosVacbDecRefCount(Vacb);
@ -743,11 +746,12 @@ CcRosCreateVacb (
}
#endif
current->MappedCount = 0;
current->DirtyVacbListEntry.Flink = NULL;
current->DirtyVacbListEntry.Blink = NULL;
current->ReferenceCount = 0;
current->PinCount = 0;
KeInitializeMutex(&current->Mutex, 0);
InitializeListHead(&current->CacheMapVacbListEntry);
InitializeListHead(&current->DirtyVacbListEntry);
InitializeListHead(&current->VacbLruListEntry);
CcRosAcquireVacbLock(current, NULL);
KeAcquireGuardedMutex(&ViewLock);
@ -988,6 +992,9 @@ CcRosInternalFreeVacb (
ASSERT(Vacb->PinCount == 0);
ASSERT(Vacb->ReferenceCount == 0);
ASSERT(IsListEmpty(&Vacb->CacheMapVacbListEntry));
ASSERT(IsListEmpty(&Vacb->DirtyVacbListEntry));
ASSERT(IsListEmpty(&Vacb->VacbLruListEntry));
RtlFillMemory(Vacb, sizeof(Vacb), 0xfd);
ExFreeToNPagedLookasideList(&VacbLookasideList, Vacb);
return STATUS_SUCCESS;
@ -1109,6 +1116,7 @@ CcRosDeleteFileCache (
current = CONTAINING_RECORD(current_entry, ROS_VACB, CacheMapVacbListEntry);
CcRosAcquireVacbLock(current, NULL);
RemoveEntryList(&current->VacbLruListEntry);
InitializeListHead(&current->VacbLruListEntry);
if (current->Dirty)
{
KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
@ -1133,6 +1141,7 @@ CcRosDeleteFileCache (
{
current_entry = RemoveTailList(&FreeList);
current = CONTAINING_RECORD(current_entry, ROS_VACB, CacheMapVacbListEntry);
InitializeListHead(&current->CacheMapVacbListEntry);
CcRosVacbDecRefCount(current);
CcRosInternalFreeVacb(current);
}