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MDE-21369 rpl.rpl_timezone fails with valgrind: Use of uninitialised value.

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It's not safe to chenge the THD::thread_id.
So send the thread_id as an argument to the mysql_audit_external_lock.
This commit is contained in:
Alexey Botchkov
2019-12-21 13:46:33 +04:00
parent 8174e68895
commit aaaf6ceb8b
2 changed files with 27 additions and 36 deletions
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41
sql/sql_insert.cc
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@ -2076,36 +2076,16 @@ public:
passed from connection thread to the handler thread.
*/
MDL_request grl_protection;
my_thread_id orig_thread_id;
void set_default_user()
{
thd.security_ctx->user=(char*) delayed_user;
thd.security_ctx->host=(char*) my_localhost;
thd.security_ctx->ip= NULL;
thd.query_id= 0;
thd.thread_id= orig_thread_id;
}
void set_user_from_row(const delayed_row *r)
{
if (r)
{
thd.security_ctx->user= r->user;
thd.security_ctx->host= r->host;
thd.security_ctx->ip= r->ip;
thd.query_id= r->query_id;
thd.thread_id= r->thread_id;
}
}
Delayed_insert(SELECT_LEX *current_select)
:locks_in_memory(0), thd(next_thread_id()),
table(0),tables_in_use(0), stacked_inserts(0),
status(0), retry(0), handler_thread_initialized(FALSE), group_count(0)
{
DBUG_ENTER("Delayed_insert constructor");
orig_thread_id= thd.thread_id;
set_default_user();
thd.security_ctx->user=(char*) delayed_user;
thd.security_ctx->host=(char*) my_localhost;
thd.security_ctx->ip= NULL;
thd.query_id= 0;
strmake_buf(thd.security_ctx->priv_user, thd.security_ctx->user);
thd.current_tablenr=0;
thd.set_command(COM_DELAYED_INSERT);
@ -3081,7 +3061,6 @@ pthread_handler_t handle_delayed_insert(void *arg)
if (di->tables_in_use && ! thd->lock && !thd->killed)
{
di->set_user_from_row(di->rows.head());
/*
Request for new delayed insert.
Lock the table, but avoid to be blocked by a global read lock.
@ -3103,16 +3082,18 @@ pthread_handler_t handle_delayed_insert(void *arg)
{
delayed_row *row;
I_List_iterator<delayed_row> it(di->rows);
my_thread_id cur_thd= di->thd.thread_id;
while ((row= it++))
{
if (di->thd.thread_id != row->thread_id)
if (cur_thd != row->thread_id)
{
di->set_user_from_row(row);
mysql_audit_external_lock(&di->thd, di->table->s, F_WRLCK);
mysql_audit_external_lock_ex(&di->thd, row->thread_id,
row->user, row->host, row->ip, row->query_id,
di->table->s, F_WRLCK);
cur_thd= row->thread_id;
}
}
di->set_default_user();
if (di->handle_inserts())
{
/* Some fatal error */