TurboJPEG: New flag for limiting prog JPEG scans

This also fixes timeouts reported by OSS-Fuzz.

ChangeLog.md

@@ -26,6 +26,15 @@ successive approximation low bit positions would, under certain circumstances,
 result in an error ("Missing Huffman code table entry") and an invalid JPEG
 image.
 
+6. Introduced a new flag (`TJFLAG_LIMITSCANS` in the TurboJPEG C API and
+`TJ.FLAG_LIMIT_SCANS` in the TurboJPEG Java API) and a corresponding TJBench
+command-line argument (`-limitscans`) that causes the TurboJPEG decompression
+and transform functions/operations to return/throw an error if a progressive
+JPEG image contains an unreasonably large number of scans.  This allows
+applications that use the TurboJPEG API to guard against an exploit of the
+progressive JPEG format described in the report
+["Two Issues with the JPEG Standard"](https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf).
+
 
 2.0.90 (2.1 beta1)
 ==================

doc/html/group___turbo_j_p_e_g.html

@@ -122,6 +122,9 @@ Macros</h2></td></tr>
 <tr class="memitem:ga43b426750b46190a25d34a67ef76df1b"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga43b426750b46190a25d34a67ef76df1b">TJFLAG_PROGRESSIVE</a></td></tr>
 <tr class="memdesc:ga43b426750b46190a25d34a67ef76df1b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Use progressive entropy coding in JPEG images generated by the compression and transform functions.  <a href="group___turbo_j_p_e_g.html#ga43b426750b46190a25d34a67ef76df1b">More...</a><br /></td></tr>
 <tr class="separator:ga43b426750b46190a25d34a67ef76df1b"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga163e6482dc5096831feef9c79ff3f805"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga163e6482dc5096831feef9c79ff3f805">TJFLAG_LIMITSCANS</a></td></tr>
+<tr class="memdesc:ga163e6482dc5096831feef9c79ff3f805"><td class="mdescLeft">&#160;</td><td class="mdescRight">Limit the number of progressive JPEG scans that the decompression and transform functions will process.  <a href="group___turbo_j_p_e_g.html#ga163e6482dc5096831feef9c79ff3f805">More...</a><br /></td></tr>
+<tr class="separator:ga163e6482dc5096831feef9c79ff3f805"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:ga79bde1b4a3e2351e00887e47781b966e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___turbo_j_p_e_g.html#ga79bde1b4a3e2351e00887e47781b966e">TJ_NUMERR</a></td></tr>
 <tr class="memdesc:ga79bde1b4a3e2351e00887e47781b966e"><td class="mdescLeft">&#160;</td><td class="mdescRight">The number of error codes.  <a href="group___turbo_j_p_e_g.html#ga79bde1b4a3e2351e00887e47781b966e">More...</a><br /></td></tr>
 <tr class="separator:ga79bde1b4a3e2351e00887e47781b966e"><td class="memSeparator" colspan="2">&#160;</td></tr>
@@ -497,6 +500,23 @@ YUV Image Format Notes</h2>
 <p>When decompressing an image that was compressed using chrominance subsampling, use the fastest chrominance upsampling algorithm available in the underlying codec. </p>
 <p>The default is to use smooth upsampling, which creates a smooth transition between neighboring chrominance components in order to reduce upsampling artifacts in the decompressed image. </p>
 
+</div>
+</div>
+<a id="ga163e6482dc5096831feef9c79ff3f805"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#ga163e6482dc5096831feef9c79ff3f805">&#9670;&nbsp;</a></span>TJFLAG_LIMITSCANS</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">#define TJFLAG_LIMITSCANS</td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Limit the number of progressive JPEG scans that the decompression and transform functions will process. </p>
+<p>If a progressive JPEG image contains an unreasonably large number of scans, then this flag will cause the decompression and transform functions to return an error. The primary purpose of this is to allow security-critical applications to guard against an exploit of the progressive JPEG format described in <a href="https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf" target="_blank">this report</a>. </p>
+
 </div>
 </div>
 <a id="ga8808d403c68b62aaa58a4c1e58e98963"></a>

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doc/html/search/variables_2.js

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 var searchData=
 [
-  ['h_144',['h',['../structtjregion.html#aecefc45a26f4d8b60dd4d825c1710115',1,'tjregion']]]
+  ['h_145',['h',['../structtjregion.html#aecefc45a26f4d8b60dd4d825c1710115',1,'tjregion']]]
 ];

doc/html/search/variables_3.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['num_145',['num',['../structtjscalingfactor.html#a9b011e57f981ee23083e2c1aa5e640ec',1,'tjscalingfactor']]]
+  ['num_146',['num',['../structtjscalingfactor.html#a9b011e57f981ee23083e2c1aa5e640ec',1,'tjscalingfactor']]]
 ];

doc/html/search/variables_4.js

@@ -1,5 +1,5 @@
 var searchData=
 [
-  ['op_146',['op',['../structtjtransform.html#a2525aab4ba6978a1c273f74fef50e498',1,'tjtransform']]],
+  ['op_147',['op',['../structtjtransform.html#a2525aab4ba6978a1c273f74fef50e498',1,'tjtransform']]],
-  ['options_147',['options',['../structtjtransform.html#ac0e74655baa4402209a21e1ae481c8f6',1,'tjtransform']]]
+  ['options_148',['options',['../structtjtransform.html#ac0e74655baa4402209a21e1ae481c8f6',1,'tjtransform']]]
 ];

doc/html/search/variables_5.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['r_148',['r',['../structtjtransform.html#ac324e5e442abec8a961e5bf219db12cf',1,'tjtransform']]]
+  ['r_149',['r',['../structtjtransform.html#ac324e5e442abec8a961e5bf219db12cf',1,'tjtransform']]]
 ];

doc/html/search/variables_6.js

@@ -1,10 +1,10 @@
 var searchData=
 [
-  ['tjalphaoffset_149',['tjAlphaOffset',['../group___turbo_j_p_e_g.html#ga5af0ab065feefd526debf1e20c43e837',1,'turbojpeg.h']]],
+  ['tjalphaoffset_150',['tjAlphaOffset',['../group___turbo_j_p_e_g.html#ga5af0ab065feefd526debf1e20c43e837',1,'turbojpeg.h']]],
-  ['tjblueoffset_150',['tjBlueOffset',['../group___turbo_j_p_e_g.html#ga84e2e35d3f08025f976ec1ec53693dea',1,'turbojpeg.h']]],
+  ['tjblueoffset_151',['tjBlueOffset',['../group___turbo_j_p_e_g.html#ga84e2e35d3f08025f976ec1ec53693dea',1,'turbojpeg.h']]],
-  ['tjgreenoffset_151',['tjGreenOffset',['../group___turbo_j_p_e_g.html#ga82d6e35da441112a411da41923c0ba2f',1,'turbojpeg.h']]],
+  ['tjgreenoffset_152',['tjGreenOffset',['../group___turbo_j_p_e_g.html#ga82d6e35da441112a411da41923c0ba2f',1,'turbojpeg.h']]],
-  ['tjmcuheight_152',['tjMCUHeight',['../group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf',1,'turbojpeg.h']]],
+  ['tjmcuheight_153',['tjMCUHeight',['../group___turbo_j_p_e_g.html#gabd247bb9fecb393eca57366feb8327bf',1,'turbojpeg.h']]],
-  ['tjmcuwidth_153',['tjMCUWidth',['../group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c',1,'turbojpeg.h']]],
+  ['tjmcuwidth_154',['tjMCUWidth',['../group___turbo_j_p_e_g.html#ga9e61e7cd47a15a173283ba94e781308c',1,'turbojpeg.h']]],
-  ['tjpixelsize_154',['tjPixelSize',['../group___turbo_j_p_e_g.html#gad77cf8fe5b2bfd3cb3f53098146abb4c',1,'turbojpeg.h']]],
+  ['tjpixelsize_155',['tjPixelSize',['../group___turbo_j_p_e_g.html#gad77cf8fe5b2bfd3cb3f53098146abb4c',1,'turbojpeg.h']]],
-  ['tjredoffset_155',['tjRedOffset',['../group___turbo_j_p_e_g.html#gadd9b446742ac8a3923f7992c7988fea8',1,'turbojpeg.h']]]
+  ['tjredoffset_156',['tjRedOffset',['../group___turbo_j_p_e_g.html#gadd9b446742ac8a3923f7992c7988fea8',1,'turbojpeg.h']]]
 ];

doc/html/search/variables_7.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['w_156',['w',['../structtjregion.html#ab6eb73ceef584fc23c8c8097926dce42',1,'tjregion']]]
+  ['w_157',['w',['../structtjregion.html#ab6eb73ceef584fc23c8c8097926dce42',1,'tjregion']]]
 ];

doc/html/search/variables_8.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['x_157',['x',['../structtjregion.html#a4b6a37a93997091b26a75831fa291ad9',1,'tjregion']]]
+  ['x_158',['x',['../structtjregion.html#a4b6a37a93997091b26a75831fa291ad9',1,'tjregion']]]
 ];

doc/html/search/variables_9.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['y_158',['y',['../structtjregion.html#a7b3e0c24cfe87acc80e334cafdcf22c2',1,'tjregion']]]
+  ['y_159',['y',['../structtjregion.html#a7b3e0c24cfe87acc80e334cafdcf22c2',1,'tjregion']]]
 ];

fuzz/decompress.cc

@@ -67,11 +67,12 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     goto bailout;
 
   for (pfi = 0; pfi < NUMPF; pfi++) {
-    int pf = pixelFormats[pfi], flags = 0, i, sum = 0, w = width, h = height;
+    int pf = pixelFormats[pfi], flags = TJFLAG_LIMITSCANS, i, sum = 0;
+    int w = width, h = height;
 
     /* Test non-default decompression options on the first iteration. */
     if (pf == TJPF_RGB)
-      flags = TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
+      flags |= TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
     /* Test IDCT scaling on the second iteration. */
     if (pf == TJPF_BGRX) {
       w = (width + 1) / 2;

fuzz/decompress_yuv.cc

@@ -64,11 +64,12 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     goto bailout;
 
   for (pfi = 0; pfi < NUMPF; pfi++) {
-    int pf = pixelFormats[pfi], flags = 0, i, sum = 0, w = width, h = height;
+    int pf = pixelFormats[pfi], flags = TJFLAG_LIMITSCANS, i, sum = 0;
+    int w = width, h = height;
 
     /* Test non-default decompression options on the first iteration. */
     if (pf == TJPF_RGB)
-      flags = TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
+      flags |= TJFLAG_BOTTOMUP | TJFLAG_FASTUPSAMPLE | TJFLAG_FASTDCT;
     /* Test IDCT scaling on the second iteration. */
     if (pf == TJPF_XRGB) {
       w = (width + 3) / 4;

fuzz/transform.cc

@@ -100,7 +100,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     goto bailout;
 
   tjTransform(handle, data, size, NUMXFORMS, dstBufs, dstSizes, transforms,
-              TJFLAG_NOREALLOC);
+              TJFLAG_LIMITSCANS | TJFLAG_NOREALLOC);
 
   maxBufSize = tjBufSize(width, height, jpegSubsamp);
 

java/TJBench.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C)2009-2014, 2016-2019 D. R. Commander.  All Rights Reserved.
+ * Copyright (C)2009-2014, 2016-2019, 2021 D. R. Commander.
+ *                                         All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -752,6 +753,8 @@ final class TJBench {
     System.out.println("-componly = Stop after running compression tests.  Do not test decompression.");
     System.out.println("-nowrite = Do not write reference or output images (improves consistency");
     System.out.println("     of performance measurements.)");
+    System.out.println("-limitscans = Refuse to decompress or transform progressive JPEG images that");
+    System.out.println("     have an unreasonably large number of scans");
     System.out.println("-stoponwarning = Immediately discontinue the current");
     System.out.println("     compression/decompression/transform operation if the underlying codec");
     System.out.println("     throws a warning (non-fatal error)\n");
@@ -929,6 +932,8 @@ final class TJBench {
             compOnly = true;
           else if (argv[i].equalsIgnoreCase("-nowrite"))
             write = false;
+          else if (argv[i].equalsIgnoreCase("-limitscans"))
+            flags |= TJ.FLAG_LIMITSCANS;
           else if (argv[i].equalsIgnoreCase("-stoponwarning"))
             flags |= TJ.FLAG_STOPONWARNING;
           else usage();

java/doc/constant-values.html

@@ -189,167 +189,174 @@
 <td class="colLast"><code>128</code></td>
 </tr>
 <tr class="rowColor">
+<td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.FLAG_LIMITSCANS">
+<!--   -->
+</a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
+<td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#FLAG_LIMITSCANS">FLAG_LIMITSCANS</a></code></td>
+<td class="colLast"><code>32768</code></td>
+</tr>
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.FLAG_PROGRESSIVE">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#FLAG_PROGRESSIVE">FLAG_PROGRESSIVE</a></code></td>
 <td class="colLast"><code>16384</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.FLAG_STOPONWARNING">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#FLAG_STOPONWARNING">FLAG_STOPONWARNING</a></code></td>
 <td class="colLast"><code>8192</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.NUMCS">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#NUMCS">NUMCS</a></code></td>
 <td class="colLast"><code>5</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.NUMERR">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#NUMERR">NUMERR</a></code></td>
 <td class="colLast"><code>2</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.NUMPF">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#NUMPF">NUMPF</a></code></td>
 <td class="colLast"><code>12</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.NUMSAMP">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#NUMSAMP">NUMSAMP</a></code></td>
 <td class="colLast"><code>6</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_ABGR">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_ABGR">PF_ABGR</a></code></td>
 <td class="colLast"><code>9</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_ARGB">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_ARGB">PF_ARGB</a></code></td>
 <td class="colLast"><code>10</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_BGR">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_BGR">PF_BGR</a></code></td>
 <td class="colLast"><code>1</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_BGRA">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_BGRA">PF_BGRA</a></code></td>
 <td class="colLast"><code>8</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_BGRX">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_BGRX">PF_BGRX</a></code></td>
 <td class="colLast"><code>3</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_CMYK">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_CMYK">PF_CMYK</a></code></td>
 <td class="colLast"><code>11</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_GRAY">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_GRAY">PF_GRAY</a></code></td>
 <td class="colLast"><code>6</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_RGB">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_RGB">PF_RGB</a></code></td>
 <td class="colLast"><code>0</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_RGBA">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_RGBA">PF_RGBA</a></code></td>
 <td class="colLast"><code>7</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_RGBX">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_RGBX">PF_RGBX</a></code></td>
 <td class="colLast"><code>2</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_XBGR">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_XBGR">PF_XBGR</a></code></td>
 <td class="colLast"><code>4</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.PF_XRGB">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#PF_XRGB">PF_XRGB</a></code></td>
 <td class="colLast"><code>5</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_411">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#SAMP_411">SAMP_411</a></code></td>
 <td class="colLast"><code>5</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_420">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#SAMP_420">SAMP_420</a></code></td>
 <td class="colLast"><code>2</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_422">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#SAMP_422">SAMP_422</a></code></td>
 <td class="colLast"><code>1</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_440">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#SAMP_440">SAMP_440</a></code></td>
 <td class="colLast"><code>4</code></td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_444">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>
 <td><code><a href="org/libjpegturbo/turbojpeg/TJ.html#SAMP_444">SAMP_444</a></code></td>
 <td class="colLast"><code>0</code></td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><a name="org.libjpegturbo.turbojpeg.TJ.SAMP_GRAY">
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;int</code></td>

java/doc/index-all.html

@@ -337,6 +337,11 @@
 <dd>
 <div class="block"><span class="strong">Deprecated.</span></div>
 </dd>
+<dt><span class="strong"><a href="./org/libjpegturbo/turbojpeg/TJ.html#FLAG_LIMITSCANS">FLAG_LIMITSCANS</a></span> - Static variable in class org.libjpegturbo.turbojpeg.<a href="./org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg">TJ</a></dt>
+<dd>
+<div class="block">Limit the number of progressive JPEG scans that the decompression and
+ transform operations will process.</div>
+</dd>
 <dt><span class="strong"><a href="./org/libjpegturbo/turbojpeg/TJ.html#FLAG_PROGRESSIVE">FLAG_PROGRESSIVE</a></span> - Static variable in class org.libjpegturbo.turbojpeg.<a href="./org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg">TJ</a></dt>
 <dd>
 <div class="block">Use progressive entropy coding in JPEG images generated by compression and

java/doc/org/libjpegturbo/turbojpeg/TJ.html

@@ -214,145 +214,152 @@ extends java.lang.Object</pre>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
+<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_LIMITSCANS">FLAG_LIMITSCANS</a></strong></code>
+<div class="block">Limit the number of progressive JPEG scans that the decompression and
+ transform operations will process.</div>
+</td>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_PROGRESSIVE">FLAG_PROGRESSIVE</a></strong></code>
 <div class="block">Use progressive entropy coding in JPEG images generated by compression and
  transform operations.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_STOPONWARNING">FLAG_STOPONWARNING</a></strong></code>
 <div class="block">Immediately discontinue the current compression/decompression/transform
  operation if the underlying codec throws a warning (non-fatal error).</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMCS">NUMCS</a></strong></code>
 <div class="block">The number of JPEG colorspaces</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMERR">NUMERR</a></strong></code>
 <div class="block">The number of error codes</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMPF">NUMPF</a></strong></code>
 <div class="block">The number of pixel formats</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMSAMP">NUMSAMP</a></strong></code>
 <div class="block">The number of chrominance subsampling options</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_ABGR">PF_ABGR</a></strong></code>
 <div class="block">ABGR pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_ARGB">PF_ARGB</a></strong></code>
 <div class="block">ARGB pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGR">PF_BGR</a></strong></code>
 <div class="block">BGR pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGRA">PF_BGRA</a></strong></code>
 <div class="block">BGRA pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGRX">PF_BGRX</a></strong></code>
 <div class="block">BGRX pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_CMYK">PF_CMYK</a></strong></code>
 <div class="block">CMYK pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_GRAY">PF_GRAY</a></strong></code>
 <div class="block">Grayscale pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGB">PF_RGB</a></strong></code>
 <div class="block">RGB pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGBA">PF_RGBA</a></strong></code>
 <div class="block">RGBA pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGBX">PF_RGBX</a></strong></code>
 <div class="block">RGBX pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XBGR">PF_XBGR</a></strong></code>
 <div class="block">XBGR pixel format.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XRGB">PF_XRGB</a></strong></code>
 <div class="block">XRGB pixel format.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_411">SAMP_411</a></strong></code>
 <div class="block">4:1:1 chrominance subsampling.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_420">SAMP_420</a></strong></code>
 <div class="block">4:2:0 chrominance subsampling.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_422">SAMP_422</a></strong></code>
 <div class="block">4:2:2 chrominance subsampling.</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_440">SAMP_440</a></strong></code>
 <div class="block">4:4:0 chrominance subsampling.</div>
 </td>
 </tr>
-<tr class="rowColor">
+<tr class="altColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_444">SAMP_444</a></strong></code>
 <div class="block">4:4:4 chrominance subsampling (no chrominance subsampling).</div>
 </td>
 </tr>
-<tr class="altColor">
+<tr class="rowColor">
 <td class="colFirst"><code>static int</code></td>
 <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_GRAY">SAMP_GRAY</a></strong></code>
 <div class="block">Grayscale.</div>
@@ -1013,6 +1020,23 @@ public static final&nbsp;int FLAG_FORCESSE3</pre>
 <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.FLAG_PROGRESSIVE">Constant Field Values</a></dd></dl>
 </li>
 </ul>
+<a name="FLAG_LIMITSCANS">
+<!--   -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>FLAG_LIMITSCANS</h4>
+<pre>public static final&nbsp;int FLAG_LIMITSCANS</pre>
+<div class="block">Limit the number of progressive JPEG scans that the decompression and
+ transform operations will process.  If a progressive JPEG image contains
+ an unreasonably large number of scans, then this flag will cause the
+ decompression and transform operations to throw an error.  The primary
+ purpose of this is to allow security-critical applications to guard
+ against an exploit of the progressive JPEG format described in
+ <a href="https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf" target="_blank">this report</a>.</div>
+<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.FLAG_LIMITSCANS">Constant Field Values</a></dd></dl>
+</li>
+</ul>
 <a name="NUMERR">
 <!--   -->
 </a>

java/org/libjpegturbo/turbojpeg/TJ.java

@@ -1,6 +1,6 @@
 /*
- * Copyright (C)2011-2013, 2017-2018, 2020 D. R. Commander.
+ * Copyright (C)2011-2013, 2017-2018, 2020-2021 D. R. Commander.
- *                                         All Rights Reserved.
+ *                                              All Rights Reserved.
  * Copyright (C)2015 Viktor Szathmáry.  All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -438,6 +438,16 @@ public final class TJ {
    * reduce compression and decompression performance considerably.
    */
   public static final int FLAG_PROGRESSIVE   = 16384;
+  /**
+   * Limit the number of progressive JPEG scans that the decompression and
+   * transform operations will process.  If a progressive JPEG image contains
+   * an unreasonably large number of scans, then this flag will cause the
+   * decompression and transform operations to throw an error.  The primary
+   * purpose of this is to allow security-critical applications to guard
+   * against an exploit of the progressive JPEG format described in
+   * <a href="https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf" target="_blank">this report</a>.
+   */
+  public static final int FLAG_LIMITSCANS    = 32768;
 
 
   /**

java/org_libjpegturbo_turbojpeg_TJ.h

@@ -61,12 +61,30 @@ extern "C" {
 #define org_libjpegturbo_turbojpeg_TJ_CS_YCCK 4L
 #undef org_libjpegturbo_turbojpeg_TJ_FLAG_BOTTOMUP
 #define org_libjpegturbo_turbojpeg_TJ_FLAG_BOTTOMUP 2L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_FORCEMMX
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_FORCEMMX 8L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE 16L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE2
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE2 32L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE3
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_FORCESSE3 128L
 #undef org_libjpegturbo_turbojpeg_TJ_FLAG_FASTUPSAMPLE
 #define org_libjpegturbo_turbojpeg_TJ_FLAG_FASTUPSAMPLE 256L
 #undef org_libjpegturbo_turbojpeg_TJ_FLAG_FASTDCT
 #define org_libjpegturbo_turbojpeg_TJ_FLAG_FASTDCT 2048L
 #undef org_libjpegturbo_turbojpeg_TJ_FLAG_ACCURATEDCT
 #define org_libjpegturbo_turbojpeg_TJ_FLAG_ACCURATEDCT 4096L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_STOPONWARNING
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_STOPONWARNING 8192L
+#undef org_libjpegturbo_turbojpeg_TJ_FLAG_PROGRESSIVE
+#define org_libjpegturbo_turbojpeg_TJ_FLAG_PROGRESSIVE 16384L
+#undef org_libjpegturbo_turbojpeg_TJ_NUMERR
+#define org_libjpegturbo_turbojpeg_TJ_NUMERR 2L
+#undef org_libjpegturbo_turbojpeg_TJ_ERR_WARNING
+#define org_libjpegturbo_turbojpeg_TJ_ERR_WARNING 0L
+#undef org_libjpegturbo_turbojpeg_TJ_ERR_FATAL
+#define org_libjpegturbo_turbojpeg_TJ_ERR_FATAL 1L
 /*
  * Class:     org_libjpegturbo_turbojpeg_TJ
  * Method:    bufSize

tjbench.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C)2009-2019 D. R. Commander.  All Rights Reserved.
+ * Copyright (C)2009-2019, 2021 D. R. Commander.  All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -800,6 +800,8 @@ static void usage(char *progName)
   printf("-componly = Stop after running compression tests.  Do not test decompression.\n");
   printf("-nowrite = Do not write reference or output images (improves consistency of\n");
   printf("     performance measurements.)\n");
+  printf("-limitscans = Refuse to decompress or transform progressive JPEG images that\n");
+  printf("     have an unreasonably large number of scans\n");
   printf("-stoponwarning = Immediately discontinue the current\n");
   printf("     compression/decompression/transform operation if the underlying codec\n");
   printf("     throws a warning (non-fatal error)\n\n");
@@ -955,6 +957,8 @@ int main(int argc, char *argv[])
         compOnly = 1;
       else if (!strcasecmp(argv[i], "-nowrite"))
         doWrite = 0;
+      else if (!strcasecmp(argv[i], "-limitscans"))
+        flags |= TJFLAG_LIMITSCANS;
       else if (!strcasecmp(argv[i], "-stoponwarning"))
         flags |= TJFLAG_STOPONWARNING;
       else usage(argv[0]);

turbojpeg.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C)2009-2020 D. R. Commander.  All Rights Reserved.
+ * Copyright (C)2009-2021 D. R. Commander.  All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -112,6 +112,32 @@ typedef struct _tjinstance {
   boolean isInstanceError;
 } tjinstance;
 
+struct my_progress_mgr {
+  struct jpeg_progress_mgr pub;
+  tjinstance *this;
+};
+typedef struct my_progress_mgr *my_progress_ptr;
+
+static void my_progress_monitor(j_common_ptr dinfo)
+{
+  my_error_ptr myerr = (my_error_ptr)dinfo->err;
+  my_progress_ptr myprog = (my_progress_ptr)dinfo->progress;
+
+  if (dinfo->is_decompressor) {
+    int scan_no = ((j_decompress_ptr)dinfo)->input_scan_number;
+
+    if (scan_no > 500) {
+      snprintf(myprog->this->errStr, JMSG_LENGTH_MAX,
+               "Progressive JPEG image has more than 500 scans");
+      snprintf(errStr, JMSG_LENGTH_MAX,
+               "Progressive JPEG image has more than 500 scans");
+      myprog->this->isInstanceError = TRUE;
+      myerr->warning = FALSE;
+      longjmp(myerr->setjmp_buffer, 1);
+    }
+  }
+}
+
 static const int pixelsize[TJ_NUMSAMP] = { 3, 3, 3, 1, 3, 3 };
 
 static const JXFORM_CODE xformtypes[TJ_NUMXOP] = {
@@ -1245,6 +1271,7 @@ DLLEXPORT int tjDecompress2(tjhandle handle, const unsigned char *jpegBuf,
 {
   JSAMPROW *row_pointer = NULL;
   int i, retval = 0, jpegwidth, jpegheight, scaledw, scaledh;
+  struct my_progress_mgr progress;
 
   GET_DINSTANCE(handle);
   this->jerr.stopOnWarning = (flags & TJFLAG_STOPONWARNING) ? TRUE : FALSE;
@@ -1261,6 +1288,14 @@ DLLEXPORT int tjDecompress2(tjhandle handle, const unsigned char *jpegBuf,
   else if (flags & TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
 #endif
 
+  if (flags & TJFLAG_LIMITSCANS) {
+    MEMZERO(&progress, sizeof(struct my_progress_mgr));
+    progress.pub.progress_monitor = my_progress_monitor;
+    progress.this = this;
+    dinfo->progress = &progress.pub;
+  } else
+    dinfo->progress = NULL;
+
   if (setjmp(this->jerr.setjmp_buffer)) {
     /* If we get here, the JPEG code has signaled an error. */
     retval = -1;  goto bailout;
@@ -1579,6 +1614,7 @@ DLLEXPORT int tjDecompressToYUVPlanes(tjhandle handle,
   JSAMPLE *_tmpbuf = NULL, *ptr;
   JSAMPROW *outbuf[MAX_COMPONENTS], *tmpbuf[MAX_COMPONENTS];
   int dctsize;
+  struct my_progress_mgr progress;
 
   GET_DINSTANCE(handle);
   this->jerr.stopOnWarning = (flags & TJFLAG_STOPONWARNING) ? TRUE : FALSE;
@@ -1600,6 +1636,14 @@ DLLEXPORT int tjDecompressToYUVPlanes(tjhandle handle,
   else if (flags & TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
 #endif
 
+  if (flags & TJFLAG_LIMITSCANS) {
+    MEMZERO(&progress, sizeof(struct my_progress_mgr));
+    progress.pub.progress_monitor = my_progress_monitor;
+    progress.this = this;
+    dinfo->progress = &progress.pub;
+  } else
+    dinfo->progress = NULL;
+
   if (setjmp(this->jerr.setjmp_buffer)) {
     /* If we get here, the JPEG code has signaled an error. */
     retval = -1;  goto bailout;
@@ -1838,6 +1882,7 @@ DLLEXPORT int tjTransform(tjhandle handle, const unsigned char *jpegBuf,
   jpeg_transform_info *xinfo = NULL;
   jvirt_barray_ptr *srccoefs, *dstcoefs;
   int retval = 0, i, jpegSubsamp, saveMarkers = 0;
+  struct my_progress_mgr progress;
 
   GET_INSTANCE(handle);
   this->jerr.stopOnWarning = (flags & TJFLAG_STOPONWARNING) ? TRUE : FALSE;
@@ -1854,6 +1899,14 @@ DLLEXPORT int tjTransform(tjhandle handle, const unsigned char *jpegBuf,
   else if (flags & TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
 #endif
 
+  if (flags & TJFLAG_LIMITSCANS) {
+    MEMZERO(&progress, sizeof(struct my_progress_mgr));
+    progress.pub.progress_monitor = my_progress_monitor;
+    progress.this = this;
+    dinfo->progress = &progress.pub;
+  } else
+    dinfo->progress = NULL;
+
   if ((xinfo =
        (jpeg_transform_info *)malloc(sizeof(jpeg_transform_info) * n)) == NULL)
     THROW("tjTransform(): Memory allocation failure");

turbojpeg.h

@@ -1,5 +1,6 @@
 /*
- * Copyright (C)2009-2015, 2017, 2020 D. R. Commander.  All Rights Reserved.
+ * Copyright (C)2009-2015, 2017, 2020-2021 D. R. Commander.
+ *                                         All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -418,6 +419,16 @@ enum TJCS {
  * reduce compression and decompression performance considerably.
  */
 #define TJFLAG_PROGRESSIVE  16384
+/**
+ * Limit the number of progressive JPEG scans that the decompression and
+ * transform functions will process.  If a progressive JPEG image contains an
+ * unreasonably large number of scans, then this flag will cause the
+ * decompression and transform functions to return an error.  The primary
+ * purpose of this is to allow security-critical applications to guard against
+ * an exploit of the progressive JPEG format described in
+ * <a href="https://libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf" target="_blank">this report</a>.
+ */
+#define TJFLAG_LIMITSCANS  32768
 
 
 /**