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Starting mysql_install_db or mariadbd with a large thread-stack size will result in an almost perpetual loop of memory blocks lost in a variety of code places.
$ rm -Rf /test/MD121121-mariadb-10.7.2-linux-x86_64-dbg/data
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$ /test/MD121121-mariadb-10.7.2-linux-x86_64-dbg/scripts/mariadb-install-db --no-defaults --force --auth-root-authentication-method=normal ${MYEXTRA_OPT} --basedir=/test/MD121121-mariadb-10.7.2-linux-x86_64-dbg --datadir=/test/MD121121-mariadb-10.7.2-linux-x86_64-dbg/data --thread-stack=1125899906842624
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Leads to:
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10.8.0 5566cbadb03856aba9c236b131f544490cd2bee4 (Debug, UBASAN)
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Installing MariaDB/MySQL system tables in '/test/MD121121-mariadb-10.7.2-linux-x86_64-dbg/data' ...
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2021-11-18 11:55:41 0 [ERROR] Can't create interrupt-thread (error 11, errno: 12)
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Warning: 80 bytes lost at 0x55f60d1f1470, allocated by T@0 at 0x55f60b547527, mysys/thr_mutex.c:342, psi/mysql_thread.h:750, sql/log.cc:1057, sql/log.cc:1168, sql/log.cc:6807, sql/log.cc:9174, sql/mysqld.cc:3066
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Warning: 2072 bytes lost at 0x55f60d1f37a0, allocated by T@0 at sql/main.cc:36, mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, psi/mysql_thread.h:750, sql/log.cc:1057, sql/log.cc:1168, sql/log.cc:6807
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Warning: 2072 bytes lost at 0x55f60d1f2f00, allocated by T@0 at sql/log.cc:9174, mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, psi/mysql_thread.h:750, sql/log.cc:1057, sql/log.cc:1168, sql/log.cc:6807
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Warning: 280 bytes lost at 0x55f60d1f12d0, allocated by T@0 at sql/log.cc:9174, mysys/mulalloc.c:51, mysys/thr_mutex.c:159, psi/mysql_thread.h:750, sql/log.cc:1057, sql/log.cc:1168, sql/log.cc:6807, sql/log.cc:9174
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Warning: 2072 bytes lost at 0x55f60d1f2660, allocated by T@0 at sql/mysqld.cc:3066, mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, psi/mysql_thread.h:750, csu/libc-start.c:342, ??:0
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Warning: 2072 bytes lost at 0x55f60d1f1dc0, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, psi/mysql_thread.h:750, sql/main.cc:36, csu/libc-start.c:342, ??:0
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Warning: 280 bytes lost at 0x55f60d1f0de0, allocated by T@0 at mysys/mulalloc.c:51, mysys/thr_mutex.c:159, psi/mysql_thread.h:750, sql/main.cc:36, csu/libc-start.c:342, ??:0
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Warning: 2440 bytes lost at 0x55f60d1ef8d0, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, sql/sql_connect.cc:496, sql/mysqld.cc:5406, sql/mysqld.cc:5695, sql/main.cc:36, csu/libc-start.c:342, ??:0
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Warning: 2440 bytes lost at 0x55f60d1eeec0, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, sql/sql_connect.cc:489, sql/mysqld.cc:5405, sql/mysqld.cc:5695, sql/main.cc:36, csu/libc-start.c:342, ??:0
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Warning: 2440 bytes lost at 0x55f60d1ee4b0, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, sql/sql_connect.cc:329, sql/mysqld.cc:5404, sql/mysqld.cc:5695, sql/main.cc:36, csu/libc-start.c:342, ??:0
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Warning: 8208 bytes lost at 0x55f60d1ec420, allocated by T@0 at mysys/my_alloc.c:69, mysys/my_alloc.c:332, mysys/tree.c:281, myisam/ft_stopwords.c:53, myisam/ft_stopwords.c:118, sql/mysqld.cc:5401, sql/mysqld.cc:5695, sql/main.cc:36
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Warning: 2072 bytes lost at 0x152314003110, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, srv/srv0srv.cc:2006, trx/trx0purge.cc:1294, srv/srv0srv.cc:1814, srv/srv0srv.cc:1970, tpool/task_group.cc:55
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Warning: 2072 bytes lost at 0x152314002870, allocated by T@0 at mysys/array.c:72, mysys/hash.c:98, mysys/thr_mutex.c:175, srv/srv0srv.cc:2006, trx/trx0purge.cc:1294, srv/srv0srv.cc:1814, srv/srv0srv.cc:1970, tpool/task_group.cc:55
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Warning: 8208 bytes lost at 0x55f60d1ea390, allocated by T@0 at mysys/my_alloc.c:69, mysys/my_alloc.c:332, mysys/tree.c:281, myisam/ft_stopwords.c:53, myisam/ft_stopwords.c:118, sql/mysqld.cc:5401, sql/mysqld.cc:5695, sql/main.cc:36
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Warning: 280 bytes lost at 0x1523140026d0, allocated by T@0 at mysys/mulalloc.c:51, mysys/thr_mutex.c:159, srv/srv0srv.cc:2006, trx/trx0purge.cc:1294, srv/srv0srv.cc:1814, srv/srv0srv.cc:1970, tpool/task_group.cc:55, tpool/task.cc:40
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Warning: 8208 bytes lost at 0x55f60d1e8300, allocated by T@0 at mysys/my_alloc.c:69, mysys/my_alloc.c:332, mysys/tree.c:281, myisam/ft_stopwords.c:53, myisam/ft_stopwords.c:118, sql/mysqld.cc:5401, sql/mysqld.cc:5695, sql/main.cc:36
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Warning: 688 bytes lost at 0x55f60d1e7fd0, allocated by T@0 at myisam/ft_stopwords.c:62, sql/mysqld.cc:5401, sql/mysqld.cc:5695, sql/main.cc:36, csu/libc-start.c:342, ??:0
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...etc...
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Killing the process can make it go <defunct>.
An ASAN run provides us upfront with:
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10.8.0 5566cbadb03856aba9c236b131f544490cd2bee4 (Debug, UBASAN)
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/test/10.8_dbg_san/sql/sql_class.cc:2192:44: runtime error: pointer index expression with base 0x7ffe27749470 overflowed to 0xfffc7ffe27749470
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2021-11-18 12:05:58 0 [Note] InnoDB: Buffer pool(s) load completed at 211118 12:05:58
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#0 0x5651ac77d982 in THD::store_globals() /test/10.8_dbg_san/sql/sql_class.cc:2192
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#1 0x5651acc7989b in plugin_load /test/10.8_dbg_san/sql/sql_plugin.cc:1846
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#2 0x5651acc7989b in plugin_init(int*, char**, int) /test/10.8_dbg_san/sql/sql_plugin.cc:1769
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#3 0x5651ac192b65 in init_server_components /test/10.8_dbg_san/sql/mysqld.cc:5080
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#4 0x5651ac1a9853 in mysqld_main(int, char**) /test/10.8_dbg_san/sql/mysqld.cc:5695
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#5 0x5651ac178b7a in main /test/10.8_dbg_san/sql/main.cc:34
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#6 0x1492b61160b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
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#7 0x5651ac04c57d in _start (/test/UBASAN_MD151121-mariadb-10.8.0-linux-x86_64-dbg/bin/mariadbd+0x825157d)
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Followed by all the memory lost notices and finally summaries for each of them:
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10.8.0 5566cbadb03856aba9c236b131f544490cd2bee4 (Debug, UBASAN)
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=================================================================
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==2140885==ERROR: LeakSanitizer: detected memory leaks
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... long list ...
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