Valgrind error with WolfSSL and encrypted binlog

worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 16000..16019
binlog_encryption.encrypted_slave 'cbc,innodb,mix' [ fail ] Found warnings/errors in server log file!
Test ended at 2019-05-24 09:11:34
line
==45105== Thread 31:
==45105== Invalid read of size 2
==45105== at 0x483F780: memmove (vg_replace_strmem.c:1271)
==45105== by 0xE77459: memcpy (string_fortified.h:34)
==45105== by 0xE77459: wolfSSL_EVP_CipherUpdate (evp.c:361)
==45105== by 0xE77459: wolfSSL_EVP_CipherUpdate (evp.c:307)
==45105== by 0xE6D376: update (my_crypt.cc:63)
==45105== by 0xE6D376: MyCTX_nopad::update(unsigned char const*, unsigned int, unsigned char*, unsigned int*) (my_crypt.cc:121)
==45105== by 0xA769EC: encryption_crypt.constprop.0 (service_encryption.h:119)
==45105== by 0xA7CE7B: Log_event::read_log_event(st_io_cache*, String*, Format_description_log_event const*, enum_binlog_checksum_alg) (log_event.cc:1860)
==45105== by 0xA86CB9: Log_event::read_log_event(st_io_cache*, Format_description_log_event const*, char) (log_event.cc:1908)
==45105== by 0x6EA3B2: next_event (slave.cc:7535)
==45105== by 0x6EA3B2: exec_relay_log_event (slave.cc:4252)
==45105== by 0x6EA3B2: handle_slave_sql (slave.cc:5592)
==45105== by 0xE1AA92: pfs_spawn_thread (pfs.cc:1862)
==45105== by 0x48665A1: start_thread (in /usr/lib64/libpthread-2.29.so)
==45105== by 0x4D4D022: clone (in /usr/lib64/libc-2.29.so)
==45105== Address 0x17a58f58 is 0 bytes after a block of size 56 alloc'd
==45105== at 0x483880B: malloc (vg_replace_malloc.c:309)
==45105== by 0xE5527D: my_malloc (my_malloc.c:101)
==45105== by 0xA7CE01: Log_event::read_log_event(st_io_cache*, String*, Format_description_log_event const*, enum_binlog_checksum_alg) (log_event.cc:1851)
==45105== by 0xA86CB9: Log_event::read_log_event(st_io_cache*, Format_description_log_event const*, char) (log_event.cc:1908)
==45105== by 0x6EA3B2: next_event (slave.cc:7535)
==45105== by 0x6EA3B2: exec_relay_log_event (slave.cc:4252)
==45105== by 0x6EA3B2: handle_slave_sql (slave.cc:5592)
==45105== by 0xE1AA92: pfs_spawn_thread (pfs.cc:1862)
==45105== by 0x48665A1: start_thread (in /usr/lib64/libpthread-2.29.so)
==45105== by 0x4D4D022: clone (in /usr/lib64/libc-2.29.so)
==45105== Invalid read of size 8
==45105== at 0x483F725: memmove (vg_replace_strmem.c:1271)
==45105== by 0xE77459: memcpy (string_fortified.h:34)
==45105== by 0xE77459: wolfSSL_EVP_CipherUpdate (evp.c:361)
==45105== by 0xE77459: wolfSSL_EVP_CipherUpdate (evp.c:307)
==45105== by 0xE6D376: update (my_crypt.cc:63)
==45105== by 0xE6D376: MyCTX_nopad::update(unsigned char const*, unsigned int, unsigned char*, unsigned int*) (my_crypt.cc:121)
==45105== by 0xA769EC: encryption_crypt.constprop.0 (service_encryption.h:119)
==45105== by 0xA7CE7B: Log_event::read_log_event(st_io_cache*, String*, Format_description_log_event const*, enum_binlog_checksum_alg) (log_event.cc:1860)
==45105== by 0xA86CB9: Log_event::read_log_event(st_io_cache*, Format_description_log_event const*, char) (log_event.cc:1908)
==45105== by 0x6EA3B2: next_event (slave.cc:7535)
==45105== by 0x6EA3B2: exec_relay_log_event (slave.cc:4252)
==45105== by 0x6EA3B2: handle_slave_sql (slave.cc:5592)
==45105== by 0xE1AA92: pfs_spawn_thread (pfs.cc:1862)
==45105== by 0x48665A1: start_thread (in /usr/lib64/libpthread-2.29.so)
==45105== by 0x4D4D022: clone (in /usr/lib64/libc-2.29.so)
==45105== Address 0x17dea640 is 0 bytes after a block of size 128 alloc'd
==45105== at 0x483880B: malloc (vg_replace_malloc.c:309)
==45105== by 0xE5527D: my_malloc (my_malloc.c:101)
==45105== by 0xA7CE01: Log_event::read_log_event(st_io_cache*, String*, Format_description_log_event const*, enum_binlog_checksum_alg) (log_event.cc:1851)
==45105== by 0xA86CB9: Log_event::read_log_event(st_io_cache*, Format_description_log_event const*, char) (log_event.cc:1908)
==45105== by 0x6EA3B2: next_event (slave.cc:7535)
==45105== by 0x6EA3B2: exec_relay_log_event (slave.cc:4252)
==45105== by 0x6EA3B2: handle_slave_sql (slave.cc:5592)
==45105== by 0xE1AA92: pfs_spawn_thread (pfs.cc:1862)
==45105== by 0x48665A1: start_thread (in /usr/lib64/libpthread-2.29.so)
==45105== by 0x4D4D022: clone (in /usr/lib64/libc-2.29.so)
^ Found warnings in /home/wlad/server/xxx/mysql-test/var/log/mysqld.2.err