FreeBSD pkg HOST-RESOURCES-MIB::hrSWInstalled stops working

Hello all,

The HOST-RESOURCES-MIB::hrSWInstalled support for FreeBSD pkg stops working after so many queries and requires an snmpd process restart. I have been observing this for quite some time and have only recently started to debug it. The code in question is at:

agent/mibgroup/host/data_access/swinst_pkginfo.c

When debugging I see it throw either:

snmp_log( LOG_ERR, "SWInst: error initializing pkgng db\n" );

or

snmp_log( LOG_ERR, "SWInst: error opening pkgng db\n" );

neither of which should be true as nothing on the system changes. After seeing one of these for a few times there are no further messages at which point I believe it's having issues before it hits 

    /* if we are using FreeBSD's pkgng */
    if (pkgng) {
        if ((it = pkgdb_query(db, NULL, MATCH_ALL)) == NULL) {
            snmp_log( LOG_ERR, "SWInst: error querying pkgng db\n" );
            return 1;
        }


It seems that if the system has fewer packages installed it can be queried more times before it stops working. I was able to reproduce the issue every time at 19 queries on one test host.

Could anyone provide any possible insight or ideas on what could be the issue here? I have compared the code with that used internally in FreeBSD pkg tool and it's nearly identical. The only thing that I felt was missing was declaring a readonly lock on the database but even adding that into the snmp code had no effect...


Thanks


-- 
  Mark Felder
  ports-secteam & portmgr member
  [email protected]

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