Trying to lock mutex when the mutex was already locked (session_tracker.cc), server hangs

--source include/have_innodb.inc

SET session_track_system_variables="*";

--error ER_NO_SUCH_TABLE

ALTER TABLE t1 NOWAIT FORCE;

USE mysql;

safe_mutex: Trying to lock mutex at /data/bld/10.5-asan/sql/session_tracker.cc, line 431, when the mutex was already locked at /data/bld/10.5-asan/sql/session_tracker.cc, line 431 in thread T@19

241005 23:09:38 [ERROR] mysqld got signal 6 ;

#7  0x00007f0ccbe45472 in __GI_abort () at ./stdlib/abort.c:79

#8  0x0000556b9755a278 in safe_mutex_lock (mp=0x556b99da0520 <LOCK_global_system_variables>, my_flags=0, file=0x556b977ddf40 "/data/bld/10.5-asan/sql/session_tracker.cc", line=431) at /data/bld/10.5-asan/mysys/thr_mutex.c:258

#9  0x0000556b9541d69e in inline_mysql_mutex_lock (that=0x556b99da0520 <LOCK_global_system_variables>, src_file=0x556b977ddf40 "/data/bld/10.5-asan/sql/session_tracker.cc", src_line=431) at /data/bld/10.5-asan/include/mysql/psi/mysql_thread.h:750

#10 0x0000556b9541fb50 in Session_sysvars_tracker::vars_list::store (this=0x62b000084300, thd=0x62b00007e218, buf=0x7f0cbc2f3350) at /data/bld/10.5-asan/sql/session_tracker.cc:431

#11 0x0000556b9542023d in Session_sysvars_tracker::store (this=0x62b0000842f0, thd=0x62b00007e218, buf=0x7f0cbc2f3350) at /data/bld/10.5-asan/sql/session_tracker.cc:501

#12 0x0000556b95422cbb in Session_tracker::store (this=0x62b000084290, thd=0x62b00007e218, buf=0x7f0cbc2f3350) at /data/bld/10.5-asan/sql/session_tracker.cc:1278

#13 0x0000556b953fd505 in Protocol::net_send_ok (this=0x62b00007e818, thd=0x62b00007e218, server_status=16386, statement_warn_count=0, affected_rows=0, id=0, message=0x62b000083f73 "", is_eof=false, skip_flush=false) at /data/bld/10.5-asan/sql/protocol.cc:280

#14 0x0000556b953ff56a in Protocol::send_ok (this=0x62b00007e818, server_status=16386, statement_warn_count=0, affected_rows=0, last_insert_id=0, message=0x62b000083f73 "", skip_flush=false) at /data/bld/10.5-asan/sql/protocol.cc:643

#15 0x0000556b953ff0f1 in Protocol::end_statement (this=0x62b00007e818) at /data/bld/10.5-asan/sql/protocol.cc:607

#16 0x0000556b956dba56 in dispatch_command (command=COM_QUERY, thd=0x62b00007e218, packet=0x62900026c219 "USE mysql", packet_length=9, is_com_multi=false, is_next_command=false) at /data/bld/10.5-asan/sql/sql_parse.cc:2485

#17 0x0000556b956d48fa in do_command (thd=0x62b00007e218) at /data/bld/10.5-asan/sql/sql_parse.cc:1376

#18 0x0000556b95b2df04 in do_handle_one_connection (connect=0x608000003a38, put_in_cache=true) at /data/bld/10.5-asan/sql/sql_connect.cc:1417

#19 0x0000556b95b2d8c7 in handle_one_connection (arg=0x6080000039b8) at /data/bld/10.5-asan/sql/sql_connect.cc:1319

#20 0x0000556b9678bc94 in pfs_spawn_thread (arg=0x61500000c898) at /data/bld/10.5-asan/storage/perfschema/pfs.cc:2201

#21 0x00007f0ccbea8044 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#22 0x00007f0ccbf2861c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

commit 9021f40b8ebfa9a9e0b01029a62742b7cdde5be5

Author: Sergei Golubchik

Date:   Mon Sep 30 18:08:00 2024 +0200

    MDEV-35050 Found wrong usage of mutex upon setting plugin session variables