UndefinedBehaviorSanitizer:DEADLYSIGNAL

==619510==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000010 (pc 0x0000006de2b4 bp 0x000200000000 sp 0x7ffe3fc3bbc0 T619510)

==619510==The signal is caused by a READ memory access.

==619510==Hint: address points to the zero page.

    #0 0x6de2b4 in __cxx_global_var_init.1130 /mariadb/10.4/sql/sys_vars.cc:5256:8

    #1 0x6de2b4 in _GLOBAL__sub_I_sys_vars.cc /mariadb/10.4/sql/sys_vars.cc

    #2 0x23fc874 in __libc_csu_init (/dev/shm/10.4/sql/mysqld+0x23fc874)

    #3 0x7fdedcfb8c99 in __libc_start_main csu/../csu/libc-start.c:264:6

    #4 0x6ee309 in _start (/dev/shm/10.4/sql/mysqld+0x6ee309)

   0x00000000006de295 <+36517>:	movabs $0x9ddfea08eb382d69,%r14

#define MASTER_INFO_VAR(X) my_offsetof(Master_info, X), sizeof(((Master_info *)0x10)->X)

#define my_offsetof(TYPE, MEMBER) PTR_BYTE_DIFF(&((TYPE *)0x10)->MEMBER, 0x10)

diff --git a/sql/mysqld.cc b/sql/mysqld.cc

index ba1d477882f..90064ac94f5 100644

--- a/sql/mysqld.cc

+++ b/sql/mysqld.cc

@@ -8991,7 +8991,7 @@ static int get_options(int *argc_ptr, char ***argv_ptr)

   /* Remember if max_user_connections was 0 at startup */

   max_user_connections_checking= global_system_variables.max_user_connections != 0;

-#ifdef HAVE_REPLICATION

+#if 0 // ifdef HAVE_REPLICATION

   {

     sys_var *max_relay_log_size_var, *max_binlog_size_var;

     /* If max_relay_log_size is 0, then set it to max_binlog_size */

diff --git a/sql/rpl_rli.cc b/sql/rpl_rli.cc

index c0ade40b461..5d41552df1b 100644

--- a/sql/rpl_rli.cc

+++ b/sql/rpl_rli.cc

@@ -82,7 +82,9 @@ Relay_log_info::Relay_log_info(bool is_slave_recovery)

   group_relay_log_name[0]= event_relay_log_name[0]=

     group_master_log_name[0]= 0;

   until_log_name[0]= ign_master_log_name_end[0]= 0;

+#if 0

   max_relay_log_size= global_system_variables.max_relay_log_size;

+#endif

   bzero((char*) &info_file, sizeof(info_file));

   bzero((char*) &cache_buf, sizeof(cache_buf));

   mysql_mutex_init(key_relay_log_info_run_lock, &run_lock, MY_MUTEX_INIT_FAST);

diff --git a/sql/sql_class.h b/sql/sql_class.h

index 8e2b6eed338..7a5a886a814 100644

--- a/sql/sql_class.h

+++ b/sql/sql_class.h

@@ -595,12 +595,14 @@ typedef struct system_variables

   ulonglong default_regex_flags;

   ulonglong max_mem_used;

+#if 0

   /**

      Place holders to store Multi-source variables in sys_var.cc during

      update and show of variables.

   */

   ulonglong slave_skip_counter;

   ulonglong max_relay_log_size;

+#endif

   ha_rows select_limit;

   ha_rows max_join_size;

diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc

index c52a8f742a8..05dd872796c 100644

--- a/sql/sys_vars.cc

+++ b/sql/sys_vars.cc

@@ -5215,6 +5215,7 @@ bool update_multi_source_variable(sys_var *self_var, THD *thd,

   return result;

 }

+#if 0

 static bool update_slave_skip_counter(sys_var *self, THD *thd, Master_info *mi)

 {

   if (mi->rli.slave_running)

@@ -5272,6 +5273,7 @@ static Sys_var_multi_source_ulonglong Sys_max_relay_log_size(

        MASTER_INFO_VAR(rli.max_relay_log_size),

        VALID_RANGE(0, 1024L*1024*1024), DEFAULT(0), BLOCK_SIZE(IO_SIZE),

        ON_UPDATE(update_max_relay_log_size));

+#endif

 static Sys_var_charptr Sys_slave_skip_errors(

        "slave_skip_errors", "Tells the slave thread to continue "

main.func_math                           [ fail ]  Found warnings/errors in server log file!

        Test ended at 2021-07-29 10:12:13

line

/mariadb/10.4/strings/ctype.c:1151:46: runtime error: applying zero offset to null pointer

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/strings/ctype.c:1151:46 in 

/mariadb/10.4/sql/sql_select.cc:3766:22: runtime error: applying non-zero offset 4020089388120 to null pointer

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/sql/sql_select.cc:3766:22 in 

/mariadb/10.4/sql/sql_select.cc:3225:32: runtime error: applying non-zero offset 936 to null pointer

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/sql/sql_select.cc:3225:32 in 

/mariadb/10.4/sql/sql_show.cc:3828:7: runtime error: call to function rpl_semi_sync_master_show_clients(THD*, st_mysql_show_var*, char*) through pointer to incorrect function type 'int (*)(THD *, st_mysql_show_var *, void *, system_status_var *, enum_var_type)'

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/sql/sql_show.cc:3828:7 in 

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/strings/decimal.c:1161:8 in 

/mariadb/10.4/strings/json_lib.c:1688:26: runtime error: index -1 out of bounds for type 'json_path_step_t [32]'

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /mariadb/10.4/strings/json_lib.c:1688:26 in 

^ Found warnings in /dev/shm/10.4/mysql-test/var/log/mysqld.1.err