Fix a stack overflow

Resolves: #1767868

djvulibre-3.5.27-stack-overflow.patch

@@ -0,0 +1,111 @@
+From e15d51510048927f172f1bf1f27ede65907d940d Mon Sep 17 00:00:00 2001
+From: Leon Bottou <leon@bottou.org>
+Date: Mon, 8 Apr 2019 22:25:55 -0400
+Subject: bug 299 fixed
+
+
+diff --git a/libdjvu/GContainer.h b/libdjvu/GContainer.h
+index 96b067c..0140211 100644
+--- a/libdjvu/GContainer.h
++++ b/libdjvu/GContainer.h
+@@ -550,52 +550,61 @@ public:
+ template <class TYPE> void
+ GArrayTemplate<TYPE>::sort(int lo, int hi)
+ {
+-  if (hi <= lo)
+-    return;
+-  if (hi > hibound || lo<lobound)
+-    G_THROW( ERR_MSG("GContainer.illegal_subscript") );
+   TYPE *data = (TYPE*)(*this);
+-  // Test for insertion sort
+-  if (hi <= lo + 50)
++  while(true)
+     {
+-      for (int i=lo+1; i<=hi; i++)
++      if (hi <= lo)
++        return;
++      if (hi > hibound || lo<lobound)
++        G_THROW( ERR_MSG("GContainer.illegal_subscript") );
++      // Test for insertion sort
++      if (hi <= lo + 50)
+         {
+-          int j = i;
+-          TYPE tmp = data[i];
+-          while ((--j>=lo) && !(data[j]<=tmp))
+-            data[j+1] = data[j];
+-          data[j+1] = tmp;
++          for (int i=lo+1; i<=hi; i++)
++            {
++              int j = i;
++              TYPE tmp = data[i];
++              while ((--j>=lo) && !(data[j]<=tmp))
++                data[j+1] = data[j];
++              data[j+1] = tmp;
++            }
++          return;
+         }
+-      return;
+-    }
+-  // -- determine suitable quick-sort pivot
+-  TYPE tmp = data[lo];
+-  TYPE pivot = data[(lo+hi)/2];
+-  if (pivot <= tmp)
+-    { tmp = pivot; pivot=data[lo]; }
+-  if (data[hi] <= tmp)
+-    { pivot = tmp; }
+-  else if (data[hi] <= pivot)
+-    { pivot = data[hi]; }
+-  // -- partition set
+-  int h = hi;
+-  int l = lo;
+-  while (l < h)
+-    {
+-      while (! (pivot <= data[l])) l++;
+-      while (! (data[h] <= pivot)) h--;
+-      if (l < h)
++      // -- determine median-of-three pivot
++      TYPE tmp = data[lo];
++      TYPE pivot = data[(lo+hi)/2];
++      if (pivot <= tmp)
++        { tmp = pivot; pivot=data[lo]; }
++      if (data[hi] <= tmp)
++        { pivot = tmp; }
++      else if (data[hi] <= pivot)
++        { pivot = data[hi]; }
++      // -- partition set
++      int h = hi;
++      int l = lo;
++      while (l < h)
+         {
+-          tmp = data[l];
+-          data[l] = data[h];
+-          data[h] = tmp;
+-          l = l+1;
+-          h = h-1;
++          while (! (pivot <= data[l])) l++;
++          while (! (data[h] <= pivot)) h--;
++          if (l < h)
++            {
++              tmp = data[l];
++              data[l] = data[h];
++              data[h] = tmp;
++              l = l+1;
++              h = h-1;
++            }
++        }
++      // -- recurse, small partition first
++      //    tail-recursion elimination
++      if (h - lo <= hi - l) {
++        sort(lo,h);
++        lo = l; // sort(l,hi)
++      } else {
++        sort(l,hi);
++        hi = h; // sort(lo,h)
+       }
+     }
+-  // -- recursively restart
+-  sort(lo, h);
+-  sort(l, hi);
+ }
+ 
+ template<class TYPE> inline TYPE&

djvulibre.spec

@@ -3,7 +3,7 @@
 Summary: DjVu viewers, encoders, and utilities
 Name: djvulibre
 Version: 3.5.27
-Release: 14%{?dist}
+Release: 15%{?dist}
 License: GPLv2+
 URL: http://djvu.sourceforge.net/
 Source0: http://downloads.sourceforge.net/djvu/%{name}-%{version}.tar.gz
@@ -11,6 +11,7 @@ Patch0: djvulibre-3.5.22-cdefs.patch
 #Patch1: djvulibre-3.5.25.3-cflags.patch
 Patch2: djvulibre-3.5.27-buffer-overflow.patch
 Patch3: djvulibre-3.5.27-infinite-loop.patch
+Patch4: djvulibre-3.5.27-stack-overflow.patch
 
 Requires(post): xdg-utils
 Requires(preun): xdg-utils
@@ -65,6 +66,7 @@ Development files for DjVuLibre.
 #%patch1 -p1 -b .cflags
 %patch2 -p1 -b .buffer-overflow
 %patch3 -p1 -b .infinite-loop
+%patch4 -p1 -b .stack-overflow
 
 
 %build 
@@ -172,6 +174,10 @@ fi
 
 
 %changelog
+* Thu Nov  7 2019 Marek Kasik <mkasik@redhat.com> - 3.5.27-15
+- Fix a stack overflow
+- Resolves: #1767868
+
 * Wed Nov  6 2019 Marek Kasik <mkasik@redhat.com> - 3.5.27-14
 - Break an infinite loop
 - Resolves: #1767857