(root@localhost) [(none)]> show variables like "%audit%";
Empty set (0.00 sec)

(root@localhost) [(none)]> INSTALL PLUGIN server_audit SONAME "server_audit.so" ;
ERROR 2013 (HY000): Lost connection to MySQL server during query
(root@localhost) [(none)]> select user from mysql.user;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id: 2
Current database: *** NONE ***

150204 9:26:46 [Note] locapathto/bin/mysqld: ready for connections.
Version: '5.5.41-MariaDB' socket: 'locapathtolog/locapathto.sock' port: 53970 MariaDB Server
150204 9:32:49 [ERROR] mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.

Server version: 5.5.41-MariaDB
key_buffer_size=33554432
read_buffer_size=8388608
max_used_connections=3
max_threads=402
thread_count=2
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 11566067 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x2aab16acd000
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x41ab10a0 thread_stack 0x48000
mysys/stacktrace.c:247(my_print_stacktrace)[0xaf303e]
sql/signal_handler.cc:153(handle_fatal_signal)[0x6db68c]
/lib64/libpthread.so.0[0x3b31a0eb70]
/lib64/libc.so.6(strlen+0x10)[0x3b31279b60]
mysys/my_alloc.c:415(strdup_root)[0xae860e]
sql/sql_plugin.cc:3924(test_plugin_options)[0x58d8cd]
sql/sql_plugin.cc:2047(finalize_install)[0x58dbde]
sql/sql_plugin.cc:2148(mysql_install_plugin(THD*, st_mysql_lex_string const*, st_mysql_lex_string const*))[0x58fdd8]
sql/sql_parse.cc:4420(mysql_execute_command(THD*))[0x58211e]
sql/sql_parse.cc:5909(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x587081]
sql/sql_parse.cc:1081(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x5887ac]
sql/sql_parse.cc:793(do_command(THD*))[0x588d52]
sql/sql_connect.cc:1266(do_handle_one_connection(THD*))[0x643aa3]
sql/sql_connect.cc:1183(handle_one_connection)[0x643bec]
/lib64/libpthread.so.0[0x3b31a0673d]
/lib64/libc.so.6(clone+0x6d)[0x3b312d44bd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x2aab16020018): INSTALL PLUGIN server_audit SONAME "server_audit.so"
Connection ID (thread ID): 16
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
150204 09:32:49 mysqld_safe Number of processes running now: 0
150204 09:32:49 mysqld_safe Number of processes running now: 0

 strings server_audit.so |grep 1.1.