[NTOS:FSRTL] Respect byte-range lock ownership (#9342)

FsRtlCheckLockForReadAccess() accepts access through an exclusive
byte-range lock when the IRP key matches, even if another process
owns the lock. FsRtlFastUnlockAll() likewise removes exclusive locks
without checking the Process argument.

Require both the key and requestor process for exclusive-read access,
and skip exclusive locks owned by other processes in FsRtlFastUnlockAll().
This matches the ownership checks already used by
FsRtlFastCheckLockForRead() and FsRtlFastUnlockAllByKey().

Reference:
- https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/nf-ntifs-_fsrtl_advanced_fcb_header-fsrtlfastchecklockforread

ntoskrnl/fsrtl/filelock.c

@@ -676,6 +676,7 @@ FsRtlCheckLockForReadAccess(IN PFILE_LOCK FileLock,
     PIO_STACK_LOCATION IoStack = IoGetCurrentIrpStackLocation(Irp);
     COMBINED_LOCK_ELEMENT ToFind;
     PCOMBINED_LOCK_ELEMENT Found;
+    PEPROCESS Process = IoGetRequestorProcess(Irp);
     DPRINT("CheckLockForReadAccess(%wZ, Offset %08x%08x, Length %x)\n",
            &IoStack->FileObject->FileName,
            IoStack->Parameters.Read.ByteOffset.HighPart,
@@ -697,7 +698,8 @@ FsRtlCheckLockForReadAccess(IN PFILE_LOCK FileLock,
         return TRUE;
     }
     Result = !Found->Exclusive.FileLock.ExclusiveLock ||
-        IoStack->Parameters.Read.Key == Found->Exclusive.FileLock.Key;
+        (IoStack->Parameters.Read.Key == Found->Exclusive.FileLock.Key &&
+         Process == Found->Exclusive.FileLock.ProcessId);
     DPRINT("CheckLockForReadAccess(%wZ) => %s\n", &IoStack->FileObject->FileName, Result ? "TRUE" : "FALSE");
     return Result;
 }
@@ -1060,6 +1062,8 @@ FsRtlFastUnlockAll(IN PFILE_LOCK FileLock,
          Entry = RtlEnumerateGenericTable(&InternalInfo->RangeTable, FALSE))
     {
         LARGE_INTEGER Length;
+        if (Entry->Exclusive.FileLock.ProcessId != Process)
+            continue;
         // We'll take the first one to be the list head, and free the others first...
         Length.QuadPart =
             Entry->Exclusive.FileLock.EndingByte.QuadPart -

sdk/include/xdk/fsrtltypes.h

@@ -190,7 +190,7 @@ typedef struct _FILE_LOCK_INFO {
   BOOLEAN ExclusiveLock;
   ULONG Key;
   PFILE_OBJECT FileObject;
-  PVOID ProcessId;
+  PVOID ProcessId;            /**< This field actually holds a pointer to EPROCESS structure */
   LARGE_INTEGER EndingByte;
 } FILE_LOCK_INFO, *PFILE_LOCK_INFO;