From af1288e6812367dfb11f5b3cadb432fed74e2cd7 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Sat, 23 Nov 2013 22:45:46 -0500 Subject: [PATCH] Defend against bad trigger definitions in contrib/lo's lo_manage() trigger. This function formerly crashed if called as a statement-level trigger, or if a column-name argument wasn't given. In passing, add the trigger name to all error messages from the function. (None of them are expected cases, so this shouldn't pose any compatibility risk.) Marc Cousin, reviewed by Sawada Masahiko --- contrib/lo/lo.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/contrib/lo/lo.c b/contrib/lo/lo.c index 9dbbbcebd2..757758fe7f 100644 --- a/contrib/lo/lo.c +++ b/contrib/lo/lo.c @@ -40,7 +40,12 @@ lo_manage(PG_FUNCTION_ARGS) HeapTuple trigtuple; /* The original value of tuple */ if (!CALLED_AS_TRIGGER(fcinfo)) /* internal error */ - elog(ERROR, "not fired by trigger manager"); + elog(ERROR, "%s: not fired by trigger manager", + trigdata->tg_trigger->tgname); + + if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event)) /* internal error */ + elog(ERROR, "%s: must be fired for row", + trigdata->tg_trigger->tgname); /* * Fetch some values from trigdata @@ -50,6 +55,10 @@ lo_manage(PG_FUNCTION_ARGS) tupdesc = trigdata->tg_relation->rd_att; args = trigdata->tg_trigger->tgargs; + if (args == NULL) /* internal error */ + elog(ERROR, "%s: no column name provided in the trigger definition", + trigdata->tg_trigger->tgname); + /* tuple to return to Executor */ if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event)) rettuple = newtuple; @@ -63,7 +72,8 @@ lo_manage(PG_FUNCTION_ARGS) attnum = SPI_fnumber(tupdesc, args[0]); if (attnum <= 0) - elog(ERROR, "column \"%s\" does not exist", args[0]); + elog(ERROR, "%s: column \"%s\" does not exist", + trigdata->tg_trigger->tgname, args[0]); /* * Handle updates -- 2.40.0