[jira] [Created] (TS-4276) Segmentation fault when hostdb runs out of space

["Thomas Jackson (JIRA)" <ji...@apache.org>]

Thomas Jackson created TS-4276:
----------------------------------

             Summary: Segmentation fault when hostdb runs out of space
                 Key: TS-4276
                 URL: https://issues.apache.org/jira/browse/TS-4276
             Project: Traffic Server
          Issue Type: Bug
            Reporter: Thomas Jackson


Hostdb assumes that `lookup_done` returns a valid HostDBInfo (as mentioned in comments-- https://github.com/apache/trafficserver/blob/master/iocore/hostdb/HostDB.cc#L1545). In actuality lookup_done can actually return NULL in error conditions-- primarily when it is full (https://github.com/apache/trafficserver/blob/master/iocore/hostdb/HostDB.cc#L1363). Because of this, if a lookup is being done when hostdb is full, r comes back as NULL and we get a segmentation fault that looks like:

{noformat}
traffic_server: Segmentation fault (Address not mapped to object [(nil)])
traffic_server - STACK TRACE: 
./bin/traffic_server(_Z19crash_logger_invokeiP9siginfo_tPv+0x8e)[0x4ab81e]
/lib64/libpthread.so.0(+0x109f0)[0x7f991609a9f0]
./bin/traffic_server(_ZN18HostDBContinuation8dnsEventEiP7HostEnt+0xebb)[0x6ad5bb]
./bin/traffic_server(_ZN8DNSEntry9postEventEiP5Event+0x45)[0x6c5405]
./bin/traffic_server(_ZN7EThread13process_eventEP5Eventi+0x8a)[0x7c2c0a]
./bin/traffic_server(_ZN7EThread7executeEv+0x7e8)[0x7c3a38]
./bin/traffic_server[0x7c26e5]
/lib64/libpthread.so.0(+0x760a)[0x7f991609160a]
/lib64/libc.so.6(clone+0x6d)[0x7f9914fa4a4d]
Segmentation fault (core dumped)
{noformat}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)