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sys: FspMupHandleIrp: correctly handle fsvol discovery with nested relative opens

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This commit is contained in:
Bill Zissimopoulos
2026-09-16 13:29:52 +03:00
parent fde790d8ea
commit db4317900b
1 changed files with 7 additions and 3 deletions
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src/sys/mup.c
+7 -3
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@@ -237,7 +237,8 @@ NTSTATUS FspMupHandleIrp(
* A CREATE request with an empty file name indicates that the fsmup device * A CREATE request with an empty file name indicates that the fsmup device
* is being opened. Check for this case and handle it. * is being opened. Check for this case and handle it.
*/ */
if (0 == FileObject->FileName.Length) if (0 == FileObject->FileName.Length &&
0 == FileObject->RelatedFileObject)
{ {
Irp->IoStatus.Status = STATUS_SUCCESS; Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED; Irp->IoStatus.Information = FILE_OPENED;
@@ -250,8 +251,11 @@ NTSTATUS FspMupHandleIrp(
* Every other CREATE request must be forwarded to the appropriate fsvol device. * Every other CREATE request must be forwarded to the appropriate fsvol device.
*/ */
while (0 != FileObject->RelatedFileObject) if (0 != FileObject->RelatedFileObject)
FileObject = FileObject->RelatedFileObject; {
FsvolDeviceObject = FspMupGetFsvolDeviceObject(FileObject->RelatedFileObject);
break;
}
FspFsmupDeviceLockPrefixTable(FsmupDeviceObject); FspFsmupDeviceLockPrefixTable(FsmupDeviceObject);
PrefixEntry = RtlFindUnicodePrefix(&FsmupDeviceExtension->PrefixTable, PrefixEntry = RtlFindUnicodePrefix(&FsmupDeviceExtension->PrefixTable,