mysqltest memory leaks

On 5.5:

rpl.rpl_get_lock 'mix' w4 [ fail ]
        Test ended at 2016-05-12 08:22:58

CURRENT_TEST: rpl.rpl_get_lock

=================================================================
==20959==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 8199 byte(s) in 1 object(s) allocated from:
    #0 0x7f6dc4bc454a in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9854a)
    #1 0x48abb2 in my_malloc /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysys/my_malloc.c:38
    #2 0x439097 in my_net_init /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/sql/net_serv.cc:116
    #3 0x434ddd in mysql_real_connect /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/sql-common/client.c:3346
    #4 0x422c75 in connect_n_handle_errors(st_command*, st_mysql*, char const*, char const*, char const*, char const*, int, char const*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:5388
    #5 0x42352e in do_connect(st_command*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:5664
    #6 0x42648d in main /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:8646
    #7 0x7f6dc399582f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: 8199 byte(s) leaked in 1 allocation(s).

rpl.rpl_test_framework 'stmt' w4 [ fail ]
        Test ended at 2016-05-12 08:48:14

CURRENT_TEST: rpl.rpl_test_framework

=================================================================
==8364==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 680 byte(s) in 34 object(s) allocated from:
    #0 0x7f8fe2a3c54a in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9854a)
    #1 0x48abb2 in my_malloc /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysys/my_malloc.c:38
    #2 0x48b270 in my_strdup /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysys/my_malloc.c:152
    #3 0x4220f9 in do_close_connection(st_command*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:5226
    #4 0x4264b5 in main /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:8651
    #5 0x7f8fe180d82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: 680 byte(s) leaked in 34 allocation(s).

main.mysqltest w4 [ fail ]
...
=================================================================
==12210==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 64 byte(s) in 2 object(s) allocated from:
    #0 0x7f9ebc36b8ca in realloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x988ca)
    #1 0x48b0a8 in my_realloc /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysys/my_malloc.c:107
    #2 0x494d9c in dynstr_append_mem /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysys/string.c:106
    #3 0x40b434 in do_eval(st_dynamic_string*, char const*, char const*, char) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:972
    #4 0x40ba91 in check_command_args(st_command*, char const*, command_arg const*, int, char) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:1170
    #5 0x41cbbb in var_set_query_get_value(st_command*, VAR*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:2592
    #6 0x41c71b in eval_expr(VAR*, char const*, char const**, bool, bool) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:2748
    #7 0x41d20a in var_set(char const*, char const*, char const*, char const*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:2292
    #8 0x41ff25 in do_let(st_command*) /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:4576
    #9 0x426b5d in main /mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/client/mysqltest.cc:8748
    #10 0x7f9ebb13c82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: 64 byte(s) leaked in 2 allocation(s).

The fix would be to backport 81bf791dfe82ceb78b98e0bcf6c9eb61743fe600 from 5.7:

commit 81bf791dfe82ceb78b98e0bcf6c9eb61743fe600
Author: Jon Olav Hauglid <email address hidden>
Date: Fri Jun 19 16:00:25 2015 +0200

    Bug#21254060: ASAN: MEMORY LEAK IN MYSQLTEST

    Fix 3 different memory leaks in mysqltest:
    1) Call dynstr_free() also in case of error.
    2) Call end_server() also when doing dirty close.
    3) Free st_connection::name before assigning new name.

    Also fixes a valgrind warning about
    Conditional jump or move depends on uninitialised value(s)