Good evening.

INTRODUCTION: -------------

We've traced an error, in our case, db_flatstore and siptrace combination causes crash core.

siptrace module tries to check siptrace table version on a DB which has no query capabilities and that causes the crash core.

This happens from kamailio-4.3.0 where db_check_table_version function call is introduced on siptrace module.

OUR CONFIGURATION: ------------------

kamailio.cfg ->

...

#!define FLAT_DBURL "flatstore:/expert/siptrace-logs"

loadmodule "db_flatstore.so" loadmodule "siptrace.so"

modparam("siptrace", "db_url", FLAT_DBURL) modparam("siptrace", "trace_flag", 0) modparam("siptrace", "trace_on", 1) modparam("siptrace", "traced_user_avp", "$avp(s:user)")

...

ERROR FLOW: -----------

siptrace.c -> if (db_check_table_version(&db_funcs, db_con, &siptrace_table, SIP_TRACE_TABLE_VERSION) < 0)

db.c -> db_check_table_version -> db_table_version(dbf, dbh, table); -> dbf->query(connection, key, 0, val, col, 1, 1, 0, &res)

From this last funtion call each thread never returns and remains blocked, and finally crashes with a nice core (it fullfills the entire disk)

OUR SUGGESTION: ------------------

We can recommend developers not to call db_check_table_version if a prior query of capabilities doesn't return: DB_CAP_QUERY. We can do it for them on db_check_table_version function.

Thanks and best regards

Eduardo Lejarreta. -- Dpto. Sistemas SARENET Parque Tecnológico de Zamudio. Edif. 103 48170 Vizcaya Spain. www.sarenet.es

Personal contact: IT Manager & VoIP Engineer. www.seeyouonnet.com