Safety fix for Aria:

- Set lastinx= ~0 when last_key.keyinfo is set.


storage/maria/ma_check.c:
  Set lastinx= ~0 when last_key.keyinfo is set
storage/maria/ma_ft_boolean_search.c:
  Set lastinx= ~0 when last_key.keyinfo is set
storage/maria/ma_rt_index.c:
  Remove setting of info->lastkey.keyinfo, as this should already be set by caller
storage/maria/ma_search.c:
  Added ASSERT to ensure that info->last_key.keyinfo is properly set
storage/maria/ma_unique.c:
   Set lastinx= ~0 when last_key.keyinfo is set

storage/maria/ma_check.c

@@ -881,6 +881,7 @@ static int chk_index(HA_CHECK *param, MARIA_HA *info, MARIA_KEYDEF *keyinfo,
   }
 
   info->last_key.keyinfo= tmp_key.keyinfo= keyinfo;
+  info->lastinx= ~0;                            /* Safety */
   tmp_key.data= tmp_key_buff;
   for ( ;; )
   {
@@ -1134,6 +1135,7 @@ static int check_keys_in_record(HA_CHECK *param, MARIA_HA *info, int extend,
       {
         (*keyinfo->make_key)(info, &key, keynr, info->lastkey_buff, record,
                              start_recpos, 0);
+        info->last_key.keyinfo= key.keyinfo;
         if (extend)
         {
           /* We don't need to lock the key tree here as we don't allow

storage/maria/ma_ft_boolean_search.c

@@ -357,6 +357,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
     ftbw->key_root=info->s->state.key_root[ftb->keynr];
     ftbw->keyinfo=info->s->keyinfo+ftb->keynr;
     info->last_key.keyinfo= key.keyinfo= ftbw->keyinfo;
+    info->lastinx= ~0;                            /* Safety */
     key.data= ftbw->word;
     key.data_length= ftbw->len;
     key.ref_length= 0;
@@ -381,6 +382,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
     }
 
     info->last_key.keyinfo= key.keyinfo= ftbw->keyinfo;
+    info->lastinx= ~0;                            /* Safety */
     key.data= lastkey_buf;
     key.data_length= USE_WHOLE_KEY;
     key.ref_length= 0;

storage/maria/ma_rt_index.c

@@ -134,7 +134,6 @@ static int maria_rtree_find_req(MARIA_HA *info, MARIA_KEYDEF *keyinfo,
         tmp_key.data_length= key_data_length;
 
         info->cur_row.lastpos= _ma_row_pos_from_key(&tmp_key);
-        info->last_key.keyinfo= keyinfo;
         info->last_key.data_length= key_data_length;
         info->last_key.ref_length=  share->base.rec_reflength;
         info->last_key.flag= 0;

storage/maria/ma_search.c

@@ -97,6 +97,7 @@ int _ma_search(register MARIA_HA *info, MARIA_KEY *key, uint32 nextflag,
 
    @note
      Position to row is stored in info->lastpos
+     Last used key is stored in info->last_key
 
    @return
    @retval  0   ok (key found)
@@ -122,6 +123,7 @@ static int _ma_search_no_save(register MARIA_HA *info, MARIA_KEY *key,
                       (ulong) (pos / info->s->block_size),
                       nextflag, (ulong) info->cur_row.lastpos));
   DBUG_EXECUTE("key", _ma_print_key(DBUG_FILE, key););
+  DBUG_ASSERT(info->last_key.keyinfo == key->keyinfo);
 
   if (pos == HA_OFFSET_ERROR)
   {

storage/maria/ma_unique.c

@@ -34,6 +34,7 @@ my_bool _ma_check_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def, uchar *record,
   MARIA_KEYDEF *keyinfo= &info->s->keyinfo[def->key];
   uchar *key_buff= info->lastkey_buff2;
   MARIA_KEY key;
+  int error= 0;
   DBUG_ENTER("_ma_check_unique");
   DBUG_PRINT("enter",("unique_hash: %lu", (ulong) unique_hash));
 
@@ -43,14 +44,19 @@ my_bool _ma_check_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def, uchar *record,
 
   /* The above changed info->lastkey_buff2. Inform maria_rnext_same(). */
   info->update&= ~HA_STATE_RNEXT_SAME;
+
+  /* Setup that unique key is active key */
   info->last_key.keyinfo= keyinfo;
 
+  /* any key pointer in data is destroyed */
+  info->lastinx= ~0;
+
   DBUG_ASSERT(key.data_length == MARIA_UNIQUE_HASH_LENGTH);
   if (_ma_search(info, &key, SEARCH_FIND, info->s->state.key_root[def->key]))
   {
     info->page_changed=1;			/* Can't optimize read next */
     info->cur_row.lastpos= lastpos;
-    DBUG_RETURN(0);				/* No matching rows */
+    goto end;
   }
 
   for (;;)
@@ -64,7 +70,8 @@ my_bool _ma_check_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def, uchar *record,
       info->page_changed= 1;			/* Can't optimize read next */
       info->cur_row.lastpos= lastpos;
       DBUG_PRINT("info",("Found duplicate"));
-      DBUG_RETURN(1);				/* Found identical  */
+      error= 1;                                 /* Found identical  */
+      goto end;
     }
     DBUG_ASSERT(info->last_key.data_length == MARIA_UNIQUE_HASH_LENGTH);
     if (_ma_search_next(info, &info->last_key, SEARCH_BIGGER,
@@ -73,9 +80,12 @@ my_bool _ma_check_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def, uchar *record,
     {
       info->page_changed= 1;			/* Can't optimize read next */
       info->cur_row.lastpos= lastpos;
-      DBUG_RETURN(0);				/* end of tree */
+      break;                                    /* end of tree */
     }
   }
+
+end:
+  DBUG_RETURN(error);
 }