source: rtems/cpukit/score/src/objectidtoname.c @ 0ab4fb7

Last change on this file since 0ab4fb7 was 0ab4fb7, checked in by Sebastian Huber <sebastian.huber@…>, on May 3, 2016 at 7:12:51 AM

score: Fix _Objects_Id_to_name()

Avoid out-of-bounds array access in case the object class is invalid.

  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 *  @file
3 *
4 *  @brief Object id to name
5 *  @ingroup Score
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2003.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/score/threadimpl.h>
22
23Objects_Name_or_id_lookup_errors _Objects_Id_to_name (
24  Objects_Id      id,
25  Objects_Name   *name
26)
27{
28  Objects_Id           tmpId;
29  Objects_Information *information;
30  Objects_Control     *the_object = (Objects_Control *) 0;
31  Objects_Locations    ignored_location;
32  ISR_lock_Context     lock_context;
33
34  /*
35   *  Caller is trusted for name != NULL.
36   */
37
38  tmpId = (id == OBJECTS_ID_OF_SELF) ? _Thread_Get_executing()->Object.id : id;
39
40  information = _Objects_Get_information_id( tmpId );
41  if ( !information )
42    return OBJECTS_INVALID_ID;
43
44  #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES)
45    if ( information->is_string )
46      return OBJECTS_INVALID_ID;
47  #endif
48
49  the_object = _Objects_Get_isr_disable(
50    information,
51    tmpId,
52    &ignored_location,
53    &lock_context
54  );
55  if ( !the_object )
56    return OBJECTS_INVALID_ID;
57
58  *name = the_object->name;
59  _ISR_lock_ISR_enable( &lock_context );
60  return OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL;
61}
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