Bug# 19573096: LOADING CORRUPTED GEOMETRY DATA INTO A

 MYISAM TABLE CAUSES THE SERVER TO CRASH Backport to mysql-5.1

Author: Sreeharsha Ramanavarapu

storage/myisam/rt_split.c

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
@@ -70,6 +70,10 @@ static double mbr_join_square(const double *a, const double *b, int n_dim)
  b += 2;
  }while (a != end);
 
+ /* Check for infinity or NaN */
+ if (my_isinf(square) || isnan(square))
+ square = DBL_MAX;
+
  return square;
 }
 
@@ -104,6 +108,9 @@ static void pick_seeds(SplitStruct *node, int n_entries,
  double max_d = -DBL_MAX;
  double d;
 
+ *seed_a = node;
+ *seed_b = node + 1;
+
  for (cur1 = node; cur1 < lim1; ++cur1)
  {
  for (cur2=cur1 + 1; cur2 < lim2; ++cur2)