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BUG#11766427, BUG#59539: Filter by server id in mysqlbinlog fails

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Problem: mysqlbinlog --server-id may filter out Format_description_log_events.
If mysqlbinlog does not process the Format_description_log_event,
then mysqlbinlog cannot read the rest of the binary log correctly.
This can have the effect that mysqlbinlog crashes, generates an error,
or generates output that causes mysqld to crash, generate an error,
or corrupt data.
Fix: Never filter out Format_description_log_events. Also, never filter
out Rotate_log_events.


client/mysqlbinlog.cc:
  Process Format_description_log_events even when the
  server_id does not match the number given by --server-id.
mysql-test/t/mysqlbinlog.test:
  Add test case.
This commit is contained in:
Sven Sandberg
2011-03-25 15:16:13 +01:00
parent 5af973582d
commit f1b638d33c
3 changed files with 43 additions and 3 deletions
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14
client/mysqlbinlog.cc
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@ -705,10 +705,18 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev,
*/
start_datetime= 0;
offset= 0; // print everything and protect against cycling rec_count
/*
Skip events according to the --server-id flag. However, don't
skip format_description or rotate events, because they they
are really "global" events that are relevant for the entire
binlog, even if they have a server_id. Also, we have to read
the format_description event so that we can parse subsequent
events.
*/
if (ev_type != ROTATE_EVENT &&
server_id && (server_id != ev->server_id))
goto end;
}
if (server_id && (server_id != ev->server_id))
/* skip just this event, continue processing the log. */
goto end;
if (((my_time_t)(ev->when) >= stop_datetime)
|| (pos >= stop_position_mot))
{