check_file_name_valid: bugfix

maharmstone · Oct 2, 2021 · 8df7493 · 8df7493
1 parent 23536dd
commit 8df7493
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/btrfs.c b/src/btrfs.c
@@ -5791,10 +5791,10 @@ NTSTATUS check_file_name_valid(_In_ PUNICODE_STRING us, _In_ bool posix, _In_ bo
 
         /* Don't allow unpaired surrogates ("WTF-16") */
 
-        if ((us->Buffer[i] & 0xdc00) == 0xdc00 && (i == 0 || ((us->Buffer[i-1] & 0xd800) != 0xd800)))
+        if ((us->Buffer[i] & 0xfc00) == 0xdc00 && (i == 0 || ((us->Buffer[i-1] & 0xfc00) != 0xd800)))
             return STATUS_OBJECT_NAME_INVALID;
 
-        if ((us->Buffer[i] & 0xd800) == 0xd800 && (i == (us->Length / sizeof(WCHAR) - 1) || ((us->Buffer[i+1] & 0xdc00) != 0xdc00)))
+        if ((us->Buffer[i] & 0xfc00) == 0xd800 && (i == (us->Length / sizeof(WCHAR)) - 1 || ((us->Buffer[i+1] & 0xfc00) != 0xdc00)))
             return STATUS_OBJECT_NAME_INVALID;
     }