MDEV-26637: (explicit length) ASAN: main.metadata and user_variables.basic MTR...

MDEV-26637: (explicit length) ASAN: main.metadata and user_variables.basic MTR failures after MDEV-26572

Use explicit length for hash record length

mysys/thr_mutex.c

@@ -332,7 +332,8 @@ int safe_mutex_lock(safe_mutex_t *mp, myf my_flags, const char *file,
         */
         pthread_mutex_lock(&THR_LOCK_mutex);
 
-        if (!my_hash_search(mutex_root->locked_mutex, (uchar*) &mp->id, 0))
+        if (!my_hash_search(mutex_root->locked_mutex, (uchar*) &mp->id,
+                            sizeof(mp->id)))
         {
           safe_mutex_deadlock_t *deadlock;
           safe_mutex_t *mutex;
@@ -352,7 +353,8 @@ int safe_mutex_lock(safe_mutex_t *mp, myf my_flags, const char *file,
           mutex= mutex_root;
           do
           {
-            if (my_hash_search(mp->locked_mutex, (uchar*) &mutex->id, 0))
+            if (my_hash_search(mp->locked_mutex, (uchar*) &mutex->id,
+                               sizeof(mutex->id)))
             {
               print_deadlock_warning(mp, mutex);
               /* Mark wrong usage to avoid future warnings for same error */
@@ -772,7 +774,8 @@ static my_bool remove_from_locked_mutex(safe_mutex_t *mp,
                        delete_mutex->id, mp->id));
 
   found= (safe_mutex_deadlock_t *) my_hash_search(mp->locked_mutex,
-                                               (uchar*) &delete_mutex->id, 0);
+                                                 (uchar*) &delete_mutex->id,
+                                                 sizeof(delete_mutex->id));
   DBUG_ASSERT(found);
   if (found)
   {

sql/hostname.cc

@@ -191,7 +191,7 @@ Host_entry *hostname_cache_first()
 
 static inline Host_entry *hostname_cache_search(const char *ip_key)
 {
-  return hostname_cache->search((uchar *) ip_key, 0);
+  return hostname_cache->search((uchar *) ip_key, HOST_ENTRY_KEY_SIZE);
 }
 
 static void add_hostname_impl(const char *ip_key, const char *hostname,

sql/rpl_parallel.cc

@@ -2347,7 +2347,8 @@ rpl_parallel::find(uint32 domain_id)
   struct rpl_parallel_entry *e;
 
   if (!(e= (rpl_parallel_entry *)my_hash_search(&domain_hash,
-                                                (const uchar *)&domain_id, 0)))
+                                                (const uchar *)&domain_id,
+                                                sizeof(domain_id))))
   {
     /* Allocate a new, empty one. */
     ulong count= opt_slave_domain_parallel_threads;

sql/rpl_rli.cc

@@ -1632,7 +1632,8 @@ scan_one_gtid_slave_pos_table(THD *thd, HASH *hash, DYNAMIC_ARRAY *array,
       goto end;
     }
 
-    if ((rec= my_hash_search(hash, (const uchar *)&domain_id, 0)))
+    if ((rec= my_hash_search(hash, (const uchar *)&domain_id,
+                             sizeof(domain_id))))
     {
       entry= (struct gtid_pos_element *)rec;
       if (entry->sub_id >= sub_id)

storage/maria/ma_open.c

@@ -1025,7 +1025,8 @@ MARIA_HA *maria_open(const char *name, int mode, uint open_flags,
       MARIA_STATE_HISTORY_CLOSED *history;
       if ((history= (MARIA_STATE_HISTORY_CLOSED *)
            my_hash_search(&maria_stored_state,
-                       (uchar*) &share->state.create_rename_lsn, 0)))
+                       (uchar*) &share->state.create_rename_lsn,
+                       sizeof(share->state.create_rename_lsn))))
       {
         /*
           Move history from hash to share. This is safe to do as we