[tthompson] 75280: [NTFS] - Add some fixes and improvements to btree.c from CR-123: -CompareTreeKeys() - Assert that the first key isn't the dummy key. -CreateIndexRootFromBTree() - Assert that Cur...

Author: tthompson
Date: Tue Jul  4 21:47:43 2017
New Revision: 75280

URL: http://svn.reactos.org/svn/reactos?rev=75280&view=rev
Log:
[NTFS] - Add some fixes and improvements to btree.c from CR-123:
-CompareTreeKeys() - Assert that the first key isn't the dummy key.
-CreateIndexRootFromBTree() - Assert that CurrentKey->IndexEntry->Length isn't 0.
-DumpBTreeKey() - Use sizeof(WCHAR) in place of magic 2.
-NtfsInsertKey() - Check for allocation failure of NewKey.

Modified:
    branches/GSoC_2016/NTFS/drivers/filesystems/ntfs/btree.c

Modified: branches/GSoC_2016/NTFS/drivers/filesystems/ntfs/btree.c
URL: http://svn.reactos.org/svn/reactos/branches/GSoC_2016/NTFS/drivers/filesyste...
==============================================================================
--- branches/GSoC_2016/NTFS/drivers/filesystems/ntfs/btree.c	[iso-8859-1] (original)
+++ branches/GSoC_2016/NTFS/drivers/filesystems/ntfs/btree.c	[iso-8859-1] Tue Jul  4 21:47:43 2017
@@ -61,6 +61,8 @@
 {
     UNICODE_STRING Key1Name, Key2Name;
     LONG Comparison;
+
+    ASSERT(!(Key1->IndexEntry->Flags & NTFS_INDEX_ENTRY_END));

// If Key2 is the "dummy key", key 1 will always come first
     if (Key2->NextKey == NULL)
@@ -322,11 +324,10 @@
             return STATUS_NOT_IMPLEMENTED;
         }

+        ASSERT(CurrentKey->IndexEntry->Length != 0);
+
         // Copy the index entry
-        if (CurrentKey->IndexEntry->Length > 0)
-            RtlCopyMemory(CurrentNodeEntry, CurrentKey->IndexEntry, CurrentKey->IndexEntry->Length);
-        else
-            DPRINT1("DRIVER ERROR: CurrentKey->IndexEntry->Length <= 0 !\n");
+        RtlCopyMemory(CurrentNodeEntry, CurrentKey->IndexEntry, CurrentKey->IndexEntry->Length);

DPRINT1("Index Node Entry Stream Length: %u\nIndex Node Entry Length: %u\n",
                 CurrentNodeEntry->KeyLength,
@@ -409,7 +410,7 @@
     if (!(Key->IndexEntry->Flags & NTFS_INDEX_ENTRY_END))
     {
         UNICODE_STRING FileName;
-        FileName.Length = Key->IndexEntry->FileName.NameLength * 2;
+        FileName.Length = Key->IndexEntry->FileName.NameLength * sizeof(WCHAR);
         FileName.MaximumLength = FileName.Length;
         FileName.Buffer = Key->IndexEntry->FileName.Name;
         DbgPrint(" '%wZ'\n", &FileName);
@@ -514,6 +515,12 @@

// Setup the New Key
     NewKey = ExAllocatePoolWithTag(NonPagedPool, sizeof(B_TREE_KEY), TAG_NTFS);
+    if (!NewKey)
+    {
+        DPRINT1("ERROR: Failed to allocate memory for new key!\n");
+        ExFreePoolWithTag(NewEntry, TAG_NTFS);
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
     NewKey->IndexEntry = NewEntry;
     NewKey->NextKey = NULL;