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The following bug has been logged on the website: Bug reference: 16144 Logged by: cili Email address: (redacted) PostgreSQL version: 12.1 Operating system: CentOS 7.4 Description: The dict_int extension is an example of an add-on dictionary template for full-text search. The 'intdict' is a built-in dictionary. If we set MAXLEN parameter with negative value for the dictionary, ts_lexize function causes a segmentation fault. The negative limit for MAXLEN which causes segmentation fault is environment dependent. # initdb # pg_ctl -D /var/lib/pgsql/data -l logfile start # psql postgres=# CREATE EXTENSION dict_int; CREATE EXTENSION postgres=# ALTER TEXT SEARCH DICTIONARY intdict (MAXLEN = -214783648); ALTER TEXT SEARCH DICTIONARY postgres=# select ts_lexize('intdict', '12345678'); server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. The connection to the server was lost. Attempting reset: Failed. !> !>\q # cat /var/lib/pgsql/data/pg_log/postgresql-Mon.log LOG: database system was shut down at 2019-12-02 12:05:17 UTC LOG: database system is ready to accept connections LOG: autovacuum launcher started LOG: server process (PID 5288) was terminated by signal 11: Segmentation fault DETAIL: Failed process was running: select ts_lexize('intdict', '12345678'); LOG: terminating any other active server processes WARNING: terminating connection because of crash of another server process DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory. HINT: In a moment you should be able to reconnect to the database and repeat your command. LOG: all server processes terminated; reinitializing FATAL: the database system is in recovery mode LOG: database system was interrupted; last known up at 2019-12-02 12:05:24 UTC LOG: database system was not properly shut down; automatic recovery in progress LOG: redo starts at 0/180D7F8 LOG: record with zero length at 0/1822720 LOG: redo done at 0/18226F0 LOG: last completed transaction was at log time 2019-12-02 12:05:42.199372+00 LOG: database system is ready to accept connections LOG: autovacuum launcher started
|2019-12-02 12:41:21+00||PG Bug reporting form||BUG #16144: Segmentation fault on dict_int extension|
|2019-12-02 16:19:20+00||Tomas Vondra||Re: BUG #16144: Segmentation fault on dict_int extension|
|2019-12-03 17:52:11+00||Tomas Vondra||Re: BUG #16144: Segmentation fault on dict_int extension|
|2019-12-03 18:06:53+00||Tomas Vondra||Re: BUG #16144: Segmentation fault on dict_int extension|