MySQL Bugs: #78241: Valgrind reports a memory leak on innodb.create

Bug #78241	Valgrind reports a memory leak on innodb.create_tablespace
Submitted:	27 Aug 2015 10:24	Modified:	1 Sep 2015 9:48
Reporter:	Laurynas Biveinis (OCA)	Email Updates:
Status:	Can't repeat	Impact on me:	None
Category:	MySQL Server: InnoDB storage engine	Severity:	S3 (Non-critical)
Version:	5.7.8	OS:	Linux
Assigned to:		CPU Architecture:	Any
Tags:	CREATE TABLESPACE, innodb, memory leak, valgrind

Description:
cmake -DWITH_DEBUG=ON -DWITH_VALGRIND=ON ...
...
$ ./mtr --valgrind --debug-server create_tablespace
...
innodb.create_tablespace                 [ pass ]  64161
worker[1] Valgrind report from /home/laurynas/obj-5.7-valgrind/mysql-test/var/log/mysqld.1.err after tests:
 innodb.create_tablespace
--------------------------------------------------------------------------
HEAP SUMMARY:
    in use at exit: 372 bytes in 10 blocks
  total heap usage: 374,924 allocs, 374,914 frees, 725,652,902 bytes allocated

Thread 1:
308 bytes in 8 blocks are definitely lost in loss record 3 of 3
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x192854C: mem_strdup(char const*) (mem0mem.ic:578)
   by 0x1940ECA: validate_create_tablespace_info(THD*, st_alter_tablespace*) (ha_innodb.cc:11954)
   by 0x19412E9: innobase_create_tablespace(handlerton*, THD*, st_alter_tablespace*) (ha_innodb.cc:12054)
   by 0x1941AE7: innobase_alter_tablespace(handlerton*, THD*, st_alter_tablespace*) (ha_innodb.cc:12224)
   by 0x15AAF80: mysql_alter_tablespace(THD*, st_alter_tablespace*) (sql_tablespace.cc:159)
   by 0x150A47A: mysql_execute_command(THD*) (sql_parse.cc:4504)
   by 0x150C600: mysql_parse(THD*, Parser_state*) (sql_parse.cc:5255)
   by 0x150189B: dispatch_command(THD*, COM_DATA*, enum_server_command) (sql_parse.cc:1272)
   by 0x15005D4: do_command(THD*) (sql_parse.cc:852)
   by 0x163EC1A: handle_connection (connection_handler_per_thread.cc:300)
   by 0x1D364E3: pfs_spawn_thread (pfs.cc:2178)
   by 0x5CCA6A9: start_thread (pthread_create.c:333)
   by 0x6814EEC: clone (clone.S:109)

LEAK SUMMARY:
   definitely lost: 308 bytes in 8 blocks
   indirectly lost: 0 bytes in 0 blocks
     possibly lost: 0 bytes in 0 blocks
   still reachable: 0 bytes in 0 blocks
        suppressed: 64 bytes in 2 blocks

For counts of detected and suppressed errors, rerun with: -v
Use --track-origins=yes to see where uninitialised values come from
ERROR SUMMARY: 13602 errors from 569 contexts (suppressed: 0 from 0)

valgrind_report                          [ fail ]

How to repeat:
See above

The same and several more errors are reported on innodb.table_compress:

innodb.table_compress                    [ pass ]   8688
worker[1] Valgrind report from /home/laurynas/obj-5.7-valgrind/mysql-test/var/log/mysqld.1.err after tests:
 innodb.table_compress
--------------------------------------------------------------------------
HEAP SUMMARY:
    in use at exit: 20,082 bytes in 30 blocks
  total heap usage: 83,947 allocs, 83,917 frees, 401,322,593 bytes allocated

Thread 1:
250 bytes in 7 blocks are indirectly lost in loss record 3 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x1C60A37: mem_strdup(char const*) (mem0mem.ic:578)
   by 0x1C61712: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:130)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)
   by 0x15058FE: mysql_execute_command(THD*) (sql_parse.cc:2958)
   by 0x150C600: mysql_parse(THD*, Parser_state*) (sql_parse.cc:5255)
   by 0x150189B: dispatch_command(THD*, COM_DATA*, enum_server_command) (sql_parse.cc:1272)

1,320 bytes in 5 blocks are indirectly lost in loss record 4 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x1C608C1: mem_heap_create_func(unsigned long, char const*, unsigned long, unsigned long) (mem0mem.ic:493)
   by 0x1C6165E: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:115)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)
   by 0x15058FE: mysql_execute_command(THD*) (sql_parse.cc:2958)
   by 0x150C600: mysql_parse(THD*, Parser_state*) (sql_parse.cc:5255)

2,856 (816 direct, 2,040 indirect) bytes in 1 blocks are definitely lost in loss record 5 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x19EDA1A: mem_heap_add_block(mem_block_info_t*, unsigned long) (mem0mem.cc:408)
   by 0x1C607A9: mem_heap_alloc(mem_block_info_t*, unsigned long) (mem0mem.ic:204)
   by 0x1C606BC: mem_heap_zalloc(mem_block_info_t*, unsigned long) (mem0mem.ic:173)
   by 0x1C61673: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:118)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)

4,896 bytes in 6 blocks are indirectly lost in loss record 6 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x19EDA1A: mem_heap_add_block(mem_block_info_t*, unsigned long) (mem0mem.cc:408)
   by 0x1C607A9: mem_heap_alloc(mem_block_info_t*, unsigned long) (mem0mem.ic:204)
   by 0x1C606BC: mem_heap_zalloc(mem_block_info_t*, unsigned long) (mem0mem.ic:173)
   by 0x1C61673: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:118)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)

5,232 bytes in 3 blocks are indirectly lost in loss record 7 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x19EDA1A: mem_heap_add_block(mem_block_info_t*, unsigned long) (mem0mem.cc:408)
   by 0x1C607A9: mem_heap_alloc(mem_block_info_t*, unsigned long) (mem0mem.ic:204)
   by 0x1C61816: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:138)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)
   by 0x15058FE: mysql_execute_command(THD*) (sql_parse.cc:2958)

5,725 (528 direct, 5,197 indirect) bytes in 2 blocks are definitely lost in loss record 8 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x1C608C1: mem_heap_create_func(unsigned long, char const*, unsigned long, unsigned long) (mem0mem.ic:493)
   by 0x1C6165E: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:115)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)
   by 0x15058FE: mysql_execute_command(THD*) (sql_parse.cc:2958)
   by 0x150C600: mysql_parse(THD*, Parser_state*) (sql_parse.cc:5255)

11,437 (6,976 direct, 4,461 indirect) bytes in 4 blocks are definitely lost in loss record 9 of 9
   at 0x4C2BBA0: malloc (vg_replace_malloc.c:296)
   by 0x195306F: ut_allocator<unsigned char>::allocate(unsigned long, unsigned char const*, char const*, bool, bool) (ut0new.h:325)
   by 0x19ED596: mem_heap_create_block_func(mem_block_info_t*, unsigned long, char const*, unsigned long, unsigned long) (mem0mem.cc:302)
   by 0x19EDA1A: mem_heap_add_block(mem_block_info_t*, unsigned long) (mem0mem.cc:408)
   by 0x1C607A9: mem_heap_alloc(mem_block_info_t*, unsigned long) (mem0mem.ic:204)
   by 0x1C61816: dict_mem_table_create(char const*, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) (dict0mem.cc:138)
   by 0x1951188: create_table_info_t::create_table_def() (ha_innodb.cc:9358)
   by 0x193ECE7: create_table_info_t::create_table() (ha_innodb.cc:11108)
   by 0x193F963: ha_innobase::create(char const*, TABLE*, st_ha_create_information*) (ha_innodb.cc:11447)
   by 0xEB191F: handler::ha_create(char const*, TABLE*, st_ha_create_information*) (handler.cc:4669)
   by 0xEB1F82: ha_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, bool, bool) (handler.cc:4828)
   by 0x1620173: rea_create_table(THD*, char const*, char const*, char const*, st_ha_create_information*, List<Create_field>&, unsigned int, st_key*, handler*, bool) (unireg.cc:522)
   by 0x159D1E1: create_table_impl(THD*, char const*, char const*, char const*, st_ha_create_information*, Alter_info*, bool, unsigned int, bool, bool*, st_key**, unsigned int*) (sql_table.cc:5194)
   by 0x159D783: mysql_create_table_no_lock(THD*, char const*, char const*, st_ha_create_information*, Alter_info*, unsigned int, bool*) (sql_table.cc:5322)
   by 0x159D8A1: mysql_create_table(THD*, TABLE_LIST*, st_ha_create_information*, Alter_info*) (sql_table.cc:5368)
   by 0x15058FE: mysql_execute_command(THD*) (sql_parse.cc:2958)

LEAK SUMMARY:
   definitely lost: 8,320 bytes in 7 blocks
   indirectly lost: 11,698 bytes in 21 blocks
     possibly lost: 0 bytes in 0 blocks
   still reachable: 0 bytes in 0 blocks
        suppressed: 64 bytes in 2 blocks

2015-08-27T11:12:29.320527Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2015-08-27T11:12:29.320647Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)
MySQL Version 5.7.9                                                                           
Turning on valgrind for all executables                                                       
Running valgrind with options " --show-reachable=yes "                                        
Turning off --check-testcases to save time when valgrinding                                   
Checking supported features...                                                                
 - SSL connections supported                                                                  
 - binaries are debug compiled                                                                
Collecting tests...                                                                           
Checking leftover processes...                                                                
Removing old var directory...                                                                 
Creating var directory '/home/miguel/ago14.2015/mysql-5.7/mysql-test/var'...                  
Installing system database...                                                                 

==============================================================================

TEST                                      RESULT   TIME (ms) or COMMENT
--------------------------------------------------------------------------

worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 13000..13009
innodb.create_tablespace                 [ pass ]  191040             
worker[1] Valgrind report from /home/miguel/ago14.2015/mysql-5.7/mysql-test/var/log/mysqld.1.err after tests:
 innodb.create_tablespace                                                                                    
--------------------------------------------------------------------------                                   
HEAP SUMMARY:                                                                                                
    in use at exit: 64 bytes in 2 blocks                                                                     
  total heap usage: 379,194 allocs, 379,192 frees, 727,003,632 bytes allocated                               

Thread 1:
32 bytes in 1 blocks are still reachable in loss record 1 of 2
   at 0x4A06A2E: malloc (vg_replace_malloc.c:270)             
   by 0x347926AC2D: CRYPTO_malloc (in /usr/lib64/libcrypto.so.1.0.1e)
   by 0x34792E4F7E: sk_new (in /usr/lib64/libcrypto.so.1.0.1e)       
   by 0x3479648984: ??? (in /usr/lib64/libssl.so.1.0.1e)             
   by 0x3479648BA8: SSL_COMP_get_compression_methods (in /usr/lib64/libssl.so.1.0.1e)
   by 0x3479650378: SSL_library_init (in /usr/lib64/libssl.so.1.0.1e)                
   by 0x1D0AEDD: ssl_start (viosslfactories.c:367)                                   
   by 0xDF1379: init_ssl() (mysqld.cc:3306)                                          
   by 0xDF41B0: mysqld_main(int, char**) (mysqld.cc:4676)                            
   by 0xDEB5F3: main (main.cc:25)                                                    

32 bytes in 1 blocks are still reachable in loss record 2 of 2
   at 0x4A06A2E: malloc (vg_replace_malloc.c:270)             
   by 0x347926AC2D: CRYPTO_malloc (in /usr/lib64/libcrypto.so.1.0.1e)
   by 0x34792E4F9C: sk_new (in /usr/lib64/libcrypto.so.1.0.1e)       
   by 0x3479648984: ??? (in /usr/lib64/libssl.so.1.0.1e)             
   by 0x3479648BA8: SSL_COMP_get_compression_methods (in /usr/lib64/libssl.so.1.0.1e)
   by 0x3479650378: SSL_library_init (in /usr/lib64/libssl.so.1.0.1e)                
   by 0x1D0AEDD: ssl_start (viosslfactories.c:367)                                   
   by 0xDF1379: init_ssl() (mysqld.cc:3306)                                          
   by 0xDF41B0: mysqld_main(int, char**) (mysqld.cc:4676)                            
   by 0xDEB5F3: main (main.cc:25)                                                    

LEAK SUMMARY:
   definitely lost: 0 bytes in 0 blocks
   indirectly lost: 0 bytes in 0 blocks
     possibly lost: 0 bytes in 0 blocks
   still reachable: 64 bytes in 2 blocks
        suppressed: 0 bytes in 0 blocks

For counts of detected and suppressed errors, rerun with: -v
Use --track-origins=yes to see where uninitialised values come from
ERROR SUMMARY: 140 errors from 34 contexts (suppressed: 6 from 6)

valgrind_report                          [ fail ]
        Test ended at 2015-08-27 08:17:28

Valgrind reported failures at shutdown, see above

--------------------------------------------------------------------------
The servers were restarted 0 times
Spent 191.040 of 306 seconds executing testcases

Completed: Failed 1/2 tests, 50.00% were successful.

Failing test(s): valgrind_report

The log files in var/log may give you some hint of what went wrong.

If you want to report this error, please read first the documentation
at http://dev.mysql.com/doc/mysql/en/mysql-test-suite.html

mysql-test-run: *** ERROR: there were failing test cases
[miguel@miguelbr mysql-test]$ ./mtr --valgrind --debug-server create_tablespace./mtr --valgrind --debug-server create_tablespace

Thank you for the bug report.

Miguel, your verification log
- does not show a single InnoDB DD-related Valgrind error (maybe the issue I'm reporting is already fixed in 5.7.9?)
- shows two -DWITH_SSL=system Valgrind errors that are system-specific, and shouldn't be related to the MTR testcase here. These two errors should be shown on almost every testcase on your system. It's a separate issue which is very annoying and should be fixed.

This is no longer reproducible on latest 5.7 after a row of fixes that were
pushed in mid-July (of which all didn't make it to 5.7.8).