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Bug#22694 "function plugin_foreach_with_mask() uses an uninitialized pointer"

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Fix uninitialized memory.


sql/sql_plugin.cc:
  move my_alloca() call out of nested stack frame.
  ensure that every element of array is initialized.
This commit is contained in:
unknown
2006-12-22 12:12:58 +01:00
parent e54bbaa3fb
commit eec509bd77
1 changed files with 10 additions and 9 deletions
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19
sql/sql_plugin.cc
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@@ -951,29 +951,30 @@ my_bool plugin_foreach_with_mask(THD *thd, plugin_foreach_func *func,
state_mask= ~state_mask; // do it only once
rw_rdlock(&THR_LOCK_plugin);
total= type == MYSQL_ANY_PLUGIN ? plugin_array.elements
: plugin_hash[type].records;
/*
Do the alloca out here in case we do have a working alloca:
leaving the nested stack frame invalidates alloca allocation.
*/
plugins=(struct st_plugin_int **)my_alloca(total*sizeof(*plugins));
if (type == MYSQL_ANY_PLUGIN)
{
total=plugin_array.elements;
plugins=(struct st_plugin_int **)my_alloca(total*sizeof(*plugins));
for (idx= 0; idx < total; idx++)
{
plugin= dynamic_element(&plugin_array, idx, struct st_plugin_int *);
if (plugin->state & state_mask)
continue;
plugins[idx]= plugin;
plugins[idx]= !(plugin->state & state_mask) ? plugin : NULL;
}
}
else
{
HASH *hash= &plugin_hash[type];
total=hash->records;
plugins=(struct st_plugin_int **)my_alloca(total*sizeof(*plugins));
HASH *hash= plugin_hash + type;
for (idx= 0; idx < total; idx++)
{
plugin= (struct st_plugin_int *) hash_element(hash, idx);
if (plugin->state & state_mask)
continue;
plugins[idx]= plugin;
plugins[idx]= !(plugin->state & state_mask) ? plugin : NULL;
}
}
rw_unlock(&THR_LOCK_plugin);