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Bug #59241 invalid memory read in do_div_mod with doubly assigned variables

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Fix: copy my_decimal by value, to avoid dangling pointers.


mysql-test/r/func_math.result:
  New test case.
mysql-test/t/func_math.test:
  New test case.
sql/item_cmpfunc.cc:
  No need to call fix_buffer_pointer() anymore.
sql/item_func.cc:
  Copy my_decimal by value, to avoid dangling pointers.
sql/my_decimal.h:
  Implement proper copy constructor and assignment operator for my_decimal.
sql/sql_analyse.cc:
  No need to call fix_buffer_pointer() anymore.
strings/decimal.c:
  Remove #line directive: it messes up TAGS and it confuses gdb when debugging.
This commit is contained in:
Tor Didriksen
2011-01-14 10:05:14 +01:00
parent ff2b529918
commit 7bf234032a
7 changed files with 44 additions and 22 deletions
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4
strings/decimal.c
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@ -1,4 +1,4 @@
/* Copyright (C) 2000 MySQL AB
/* Copyright (c) 2000, 2011, 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
@ -13,8 +13,6 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#line 18 "decimal.c"
/*
=======================================================================
NOTE: this library implements SQL standard "exact numeric" type