[OpenSIPS-Users] segfault returning values from cachedb_redis

Will Bazdarich mwbazdarich at yahoo.com
Tue Feb 3 22:18:38 CET 2015

OS Version: CentOS Linux release 7.0.1406 (Core)Linux 3.10.0-123.20.1.el7.x86_64 x86_64
redis_version:2.8.14Opensips Version: NOTICE:core:main: version: opensips 1.11.3-notls (x86_64/linux) (cloned from GitHub 2015-02-02)
Description of Problem: Attempting to implement cachedb_redis key/value store. When Redis queries return NULL (no matching key in Redis) script runs fine, when a value is returned from Redis it causes a segmentation fault (output below). Able to reproduce using "cache_fetch" as well as "cache_raw_query." I am passing Redis an IP address as a key and originally thought the "." was causing the segfault, however, I used a substitution to replace "." with "_" and the segfault still occurs. Further testing showed that removing matching keys from Redis allowed the script to carry on which leads me to believe it is the return from Redis causing the seg fault and not the format of the key.
Relevant config lines:loadmodule "cachedb_redis.so"modparam("cachedb_redis", "cachedb_url","redis:group1://localhost:6379/")#...$avp(s_ip) = $si;
avp_subst("$avp(s_ip)/$avp(s_ip_format)","/\./_/g"); cache_fetch("redis:group1","$avp(s_ip_format)",$avp(host_type));#also tried:#cache_raw_query("redis:group1","HGET known_hosts $avp(s_ip_format)","$avp(host_type)");
Relevant log output:Feb  3 13:09:22 localhost /usr/local/sbin/opensips[12528]: NOTICE:cachedb_redis:destroy: destroy module cachedb_redis ...Feb  3 13:09:23 localhost /usr/local/sbin/opensips[12489]: ERROR:core:cachedb_fetch: Wrong argument <local> - no cachedb system with this name registeredFeb  3 13:09:23 localhost kernel: opensips[12489]: segfault at 0 ip           (null) sp 00007fff5bc53678 error 14 in opensips[400000+1f1000]Feb  3 13:09:23 localhost /usr/local/sbin/opensips[12486]: INFO:core:handle_sigs: child process 12489 exited by a signal 11Feb  3 13:09:23 localhost /usr/local/sbin/opensips[12486]: INFO:core:handle_sigs: core was generatedFeb  3 13:09:23 localhost /usr/local/sbin/opensips[12486]: INFO:core:handle_sigs: terminating due to SIGCHLD
Here is the monitor output from Redis (replaced the actually IP addresses being dipped). This shows that, prior to the segmentation fault Opensips properly queried Redis and received a NULL response (since is not a valid key while is) and the second query create the segfault:1422997762.024040 [0] "GET" "192_168_1_1"1422997762.047668 [0] "GET" "192_168_1_2"
Core Info (I may be doing this incorrectly):(gdb) bt full#0  0x0000000000000000 in ?? ()No symbol table info available.#1  0x00007fc7423d4484 in ?? ()No symbol table info available.#2  0x00007fc743d57de8 in ?? ()No symbol table info available.#3  0x00000000004ecc44 in ?? ()No symbol table info available.#4  0x0000000000000010 in ?? ()No symbol table info available.#5  0xffff8000a43ac8f1 in ?? ()No symbol table info available.#6  0x00007fc743d57de8 in ?? ()No symbol table info available.#7  0x00007fc743d4d1ef in ?? ()No symbol table info available.#8  0x00007fff5bc53760 in ?? ()No symbol table info available.#9  0xcccccccccccccccd in ?? ()No symbol table info available.#10 0x00007fc743d2e7f0 in ?? ()No symbol table info available.#11 0x00000000004f21db in ?? ()No symbol table info available.#12 0x00007fc743d4e1b8 in ?? ()No symbol table info available.#13 0x0000000000000000 in ?? ()No symbol table info available.
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