Sync with trunk r63383 .

[reactos.git] / dll / 3rdparty / libjpeg / jdmarker.c

diff --git a/dll/3rdparty/libjpeg/jdmarker.c b/dll/3rdparty/libjpeg/jdmarker.c
index ce8b713..3fbe5c1 100644 (file)
--- a/dll/3rdparty/libjpeg/jdmarker.c
+++ b/dll/3rdparty/libjpeg/jdmarker.c
@@ -2,7 +2,7 @@
  * jdmarker.c
  *
  * Copyright (C) 1991-1998, Thomas G. Lane.
- * Modified 2009-2012 by Guido Vollbeding.
+ * Modified 2009-2013 by Guido Vollbeding.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -269,8 +269,8 @@ get_sof (j_decompress_ptr cinfo, boolean is_baseline, boolean is_prog,
   /* We don't support files in which the image height is initially specified */
   /* as 0 and is later redefined by DNL.  As long as we have to check that,  */
   /* might as well have a general sanity check. */
-  if (cinfo->image_height <= 0 || cinfo->image_width <= 0
-      || cinfo->num_components <= 0)
+  if (cinfo->image_height <= 0 || cinfo->image_width <= 0 ||
+      cinfo->num_components <= 0)
     ERREXIT(cinfo, JERR_EMPTY_IMAGE);
 
   if (length != (cinfo->num_components * 3))
@@ -350,6 +350,9 @@ get_sos (j_decompress_ptr cinfo)
 
     /* Detect the case where component id's are not unique, and, if so, */
     /* create a fake component id using the same logic as in get_sof.   */
+    /* Note:  This also ensures that all of the SOF components are      */
+    /* referenced in the single scan case, which prevents access to     */
+    /* uninitialized memory in later decoding stages. */
     for (ci = 0; ci < i; ci++) {
       if (c == cinfo->cur_comp_info[ci]->component_id) {
        c = cinfo->cur_comp_info[0]->component_id;
@@ -493,6 +496,8 @@ get_dht (j_decompress_ptr cinfo)
     if (count > 256 || ((INT32) count) > length)
       ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
 
+    MEMZERO(huffval, SIZEOF(huffval)); /* pre-zero array for later copy */
+
     for (i = 0; i < count; i++)
       INPUT_BYTE(cinfo, huffval[i], return FALSE);
 
@@ -735,12 +740,13 @@ examine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data,
     cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]);
     cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]);
     /* Check version.
-     * Major version must be 1, anything else signals an incompatible change.
+     * Major version must be 1 or 2, anything else signals an incompatible
+     * change.
      * (We used to treat this as an error, but now it's a nonfatal warning,
      * because some bozo at Hijaak couldn't read the spec.)
      * Minor version should be 0..2, but process anyway if newer.
      */
-    if (cinfo->JFIF_major_version != 1)
+    if (cinfo->JFIF_major_version != 1 && cinfo->JFIF_major_version != 2)
       WARNMS2(cinfo, JWRN_JFIF_MAJOR,
              cinfo->JFIF_major_version, cinfo->JFIF_minor_version);
     /* Generate trace messages */