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MDEV-32388 MSAN / Valgrind errors in Item_func_like::get_mm_leaf upon query from partitioned table

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The problem was that RANGE_OPT_PARAM was not completely initialized in
some cases.
Added bzero() to ensure that all elements are always initialized.
This commit is contained in:
Monty
2023-10-10 12:23:08 +03:00
parent 55534a2616
commit 8bf17c579b
3 changed files with 30 additions and 0 deletions
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3
sql/opt_range.cc
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@@ -2757,6 +2757,7 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
DBUG_RETURN(0); // Fatal error flag is set
/* set up parameter that is passed to all functions */
bzero((void*) &param, sizeof(param));
param.thd= thd;
param.baseflag= head->file->ha_table_flags();
param.prev_tables=prev_tables | const_tables;
@@ -3949,6 +3950,7 @@ bool prune_partitions(THD *thd, TABLE *table, Item *pprune_cond)
prune_param.part_info= part_info;
init_sql_alloc(key_memory_quick_range_select_root, &alloc,
thd->variables.range_alloc_block_size, 0, MYF(MY_THREAD_SPECIFIC));
bzero((void*) range_par, sizeof(*range_par));
range_par->mem_root= &alloc;
range_par->old_root= thd->mem_root;
@@ -3974,6 +3976,7 @@ bool prune_partitions(THD *thd, TABLE *table, Item *pprune_cond)
range_par->remove_jump_scans= FALSE;
range_par->real_keynr[0]= 0;
range_par->alloced_sel_args= 0;
range_par->note_unusable_keys= 0;
thd->no_errors=1; // Don't warn about NULL
thd->mem_root=&alloc;