mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-17 04:22:27 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

filesort.cc:

Browse source 
Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
  server crash.
  Free smaller buffer before allocating bigger one.
This commit is contained in:
evgen@moonbone.local 2008-01-10 18:54:34 +03:00
parent 165dfa3eba
commit 830b8f0e30
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
sql/filesort.cc
View file

@ -239,10 +239,14 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length,
}
else
{
if (table_sort.buffpek && table_sort.buffpek_len < maxbuffer)
{
x_free(table_sort.buffpek);
table_sort.buffpek= 0;
}
if (!(table_sort.buffpek=
read_buffpek_from_file(&buffpek_pointers, maxbuffer,
(table_sort.buffpek_len < maxbuffer ?
NULL : table_sort.buffpek))))
table_sort.buffpek)))
goto err;
buffpek= (BUFFPEK *) table_sort.buffpek;
table_sort.buffpek_len= maxbuffer;