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sys: rename: bail early when attempting to replace directory

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This commit is contained in:
Bill Zissimopoulos
2016-11-22 15:47:34 -08:00
parent ba78fbb956
commit 1f385a9ab5
2 changed files with 22 additions and 4 deletions
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8
src/sys/file.c
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@ -1067,7 +1067,7 @@ NTSTATUS FspFileNodeRenameCheck(PDEVICE_OBJECT FsvolDeviceObject, PIRP OplockIrp
if (!CheckingOldName)
{
/* make sure no processes are mapping any descendants as an image */
/* replaced file cannot be a directory or mapped as an image */
for (
DescendantFileNodeIndex = 0;
DescendantFileNodeCount > DescendantFileNodeIndex;
@ -1076,8 +1076,10 @@ NTSTATUS FspFileNodeRenameCheck(PDEVICE_OBJECT FsvolDeviceObject, PIRP OplockIrp
DescendantFileNode = DescendantFileNodes[DescendantFileNodeIndex];
DescendantFileNode = (PVOID)((UINT_PTR)DescendantFileNode & ~7);
if (!MmFlushImageSection(&DescendantFileNode->NonPaged->SectionObjectPointers,
MmFlushForDelete))
if ((DescendantFileNode->FileName.Length > FileName->Length &&
L'\\' == DescendantFileNode->FileName.Buffer[FileName->Length / sizeof(WCHAR)]) ||
!MmFlushImageSection(&DescendantFileNode->NonPaged->SectionObjectPointers,
MmFlushForDelete))
{
/* release the FileNode in case of failure! */
FspFileNodeReleaseF(FileNode, AcquireFlags);