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MDEV-28124 Server crashes in Explain_aggr_filesort::print_json_members

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SHOW EXPLAIN/ANALYZE FORMAT=JSON tries to access items that have already been
freed by a call to free_items() during THD::cleanup_after_query().
The solution is to disallow APC calls including SHOW EXPLAIN/ANALYZE
just before the call to free_items().
This commit is contained in:
Oleg Smirnov
2022-03-27 11:58:27 +07:00
committed by Sergei Petrunia
parent a0475cb9ca
commit 02c3babdec
22 changed files with 303 additions and 87 deletions
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2
sql/sql_explain.h
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@ -486,6 +486,8 @@ public:
void query_plan_ready();
void notify_item_objects_about_to_be_freed();
MEM_ROOT *mem_root;
Explain_update *get_upd_del_plan() { return upd_del_plan; }