Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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N/A
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None
Description
--source include/have_sequence.inc
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SET SESSION mhnsw_max_edges_per_node = 4; |
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CREATE TABLE t (a INT, v BLOB NOT NULL) ENGINE=MyISAM; |
INSERT INTO t SELECT seq, x'00000000' FROM seq_1_to_10; |
ALTER TABLE t ADD VECTOR(v); |
CREATE TABLE x LIKE t; |
INSERT INTO t VALUES (11,x'00000000'); |
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# Cleanup
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DROP TABLE t, x; |
bb-11.6-MDEV-32887-vector 77be73c489fb7c21ca58e78cef10e0c166f293d8 |
==676249==ERROR: AddressSanitizer: use-after-poison on address 0x7fbec1166eb0 at pc 0x55ec6204cb5f bp 0x7fbec2a75660 sp 0x7fbec2a75658
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WRITE of size 8 at 0x7fbec1166eb0 thread T5
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#0 0x55ec6204cb5e in FVectorNode::load_from_record(TABLE*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:785
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#1 0x55ec6204ba53 in FVectorNode::load(TABLE*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:731
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#2 0x55ec620502b8 in search_layer /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:1073
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#3 0x55ec6205280d in mhnsw_insert(TABLE*, st_key*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:1206
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#4 0x55ec610ecca0 in TABLE::hlindexes_on_insert() /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_base.cc:9919
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#5 0x55ec61c42884 in handler::ha_write_row(unsigned char const*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/handler.cc:8163
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#6 0x55ec611be63d in write_record(THD*, TABLE*, st_copy_info*, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:2322
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#7 0x55ec611b4d6d in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:1179
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#8 0x55ec61285037 in mysql_execute_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:4458
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#9 0x55ec6129cbf9 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:7873
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#10 0x55ec61273c1b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1892
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#11 0x55ec6127092f in do_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1405
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#12 0x55ec61760188 in do_handle_one_connection(CONNECT*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1448
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#13 0x55ec6175fb49 in handle_one_connection /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1350
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#14 0x55ec62403671 in pfs_spawn_thread /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/pfs.cc:2198
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#15 0x7fbecdca8043 in start_thread nptl/pthread_create.c:442
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#16 0x7fbecdd2861b in clone3 ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
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0x7fbec1166eb0 is located 1712 bytes inside of 1048592-byte region [0x7fbec1166800,0x7fbec1266810)
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allocated by thread T5 here:
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#0 0x7fbece8b89cf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
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#1 0x55ec6317e689 in my_malloc /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/mysys/my_malloc.c:93
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#2 0x55ec63150c55 in root_alloc /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/mysys/my_alloc.c:66
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#3 0x55ec63152645 in alloc_root /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/mysys/my_alloc.c:333
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#4 0x55ec62059aaf in MHNSW_Share::alloc_node_internal() /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:328
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#5 0x55ec6205a946 in MHNSW_Share::get_node(void const*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:439
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#6 0x55ec6204ac1a in MHNSW_Share::acquire(MHNSW_Share**, TABLE*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:676
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#7 0x55ec620519cb in mhnsw_insert(TABLE*, st_key*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:1155
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#8 0x55ec610ecca0 in TABLE::hlindexes_on_insert() /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_base.cc:9919
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#9 0x55ec61c42884 in handler::ha_write_row(unsigned char const*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/handler.cc:8163
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#10 0x55ec611be63d in write_record(THD*, TABLE*, st_copy_info*, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:2322
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#11 0x55ec611b4d6d in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_insert.cc:1179
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#12 0x55ec61285037 in mysql_execute_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:4458
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#13 0x55ec6129cbf9 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:7873
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#14 0x55ec61273c1b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1892
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#15 0x55ec6127092f in do_command(THD*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_parse.cc:1405
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#16 0x55ec61760188 in do_handle_one_connection(CONNECT*, bool) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1448
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#17 0x55ec6175fb49 in handle_one_connection /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/sql_connect.cc:1350
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#18 0x55ec62403671 in pfs_spawn_thread /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/pfs.cc:2198
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#19 0x7fbecdca8043 in start_thread nptl/pthread_create.c:442
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Thread T5 created by T0 here:
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#0 0x7fbece849726 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cpp:207
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#1 0x55ec623ff413 in my_thread_create /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/my_thread.h:38
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#2 0x55ec62403a60 in pfs_spawn_thread_v1 /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/storage/perfschema/pfs.cc:2249
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#3 0x55ec60e8cc33 in inline_mysql_thread_create /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/include/mysql/psi/mysql_thread.h:1139
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#4 0x55ec60ea53fa in create_thread_to_handle_connection(CONNECT*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6267
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#5 0x55ec60ea5a1f in create_new_thread(CONNECT*) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6329
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#6 0x55ec60ea5d0a in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6391
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#7 0x55ec60ea6992 in handle_connections_sockets() /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6504
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#8 0x55ec60ea4c77 in mysqld_main(int, char**) /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/mysqld.cc:6162
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#9 0x55ec60e8bd58 in main /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/main.cc:34
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#10 0x7fbecdc461c9 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
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SUMMARY: AddressSanitizer: use-after-poison /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-asan/sql/vector_mhnsw.cc:785 in FVectorNode::load_from_record(TABLE*)
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Shadow bytes around the buggy address:
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0x0ff858224d80: 00 00 00 05 f7 00 00 00 00 00 00 00 00 00 00 00
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0x0ff858224d90: 00 00 05 f7 00 00 00 00 00 00 00 00 00 00 00 00
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0x0ff858224da0: 00 05 f7 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0ff858224db0: 05 f7 00 00 00 00 00 00 00 00 00 00 00 00 00 05
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0x0ff858224dc0: f7 00 00 00 00 00 00 00 00 00 00 f7 00 00 00 00
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=>0x0ff858224dd0: 00 00 00 00 00 00[f7]f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff858224de0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff858224df0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff858224e00: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff858224e10: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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0x0ff858224e20: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
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Shadow byte legend (one shadow byte represents 8 application bytes):
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Addressable: 00
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Partially addressable: 01 02 03 04 05 06 07
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Heap left redzone: fa
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Freed heap region: fd
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Stack left redzone: f1
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Stack mid redzone: f2
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Stack right redzone: f3
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Stack after return: f5
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Stack use after scope: f8
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Global redzone: f9
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Global init order: f6
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Poisoned by user: f7
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Container overflow: fc
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Array cookie: ac
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Intra object redzone: bb
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ASan internal: fe
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Left alloca redzone: ca
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Right alloca redzone: cb
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==676249==ABORTING
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241004 16:02:40 [ERROR] mysqld got signal 6 ;
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Sorry, we probably made a mistake, and this is a bug.
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Your assistance in bug reporting will enable us to fix this for the next release.
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To report this bug, see https://mariadb.com/kb/en/reporting-bugs
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We will try our best to scrape up some info that will hopefully help
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diagnose the problem, but since we have already crashed,
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something is definitely wrong and this may fail.
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Server version: 11.7.0-MariaDB-debug-log source revision: 77be73c489fb7c21ca58e78cef10e0c166f293d8
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key_buffer_size=1048576
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read_buffer_size=131072
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max_used_connections=1
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max_threads=153
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thread_count=1
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It is possible that mysqld could use up to
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key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 64017 K bytes of memory
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Hope that's ok; if not, decrease some variables in the equation.
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Thread pointer: 0x62c0000c0218
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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stack_bottom = 0x7fbec2a78bd0 thread_stack 0xb00000
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sanitizer_common/sanitizer_common_interceptors.inc:4277(__interceptor_backtrace.part.0)[0x7fbece851f31]
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mysys/stacktrace.c:215(my_print_stacktrace)[0x55ec6318f554]
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sql/signal_handler.cc:239(handle_fatal_signal)[0x55ec61bfad28]
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libc_sigaction.c:0(__restore_rt)[0x7fbecdc5afd0]
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nptl/pthread_kill.c:44(__pthread_kill_implementation)[0x7fbecdca9d3c]
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posix/raise.c:27(__GI_raise)[0x7fbecdc5af32]
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stdlib/abort.c:81(__GI_abort)[0x7fbecdc45472]
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sanitizer_common/sanitizer_posix_libcdep.cpp:137(__sanitizer::Abort())[0x7fbece8d650f]
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sanitizer_common/sanitizer_termination.cpp:59(__sanitizer::Die())[0x7fbece8e2ba1]
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asan/asan_report.cpp:190(__asan::ScopedInErrorReport::~ScopedInErrorReport())[0x7fbece8c1f5e]
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asan/asan_report.cpp:479(__asan::ReportGenericError(unsigned long, unsigned long, unsigned long, unsigned long, bool, unsigned long, unsigned int, bool))[0x7fbece8c14c6]
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asan/asan_rtl.cpp:128(__asan_report_store8)[0x7fbece8c290f]
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sql/vector_mhnsw.cc:785(FVectorNode::load_from_record(TABLE*))[0x55ec6204cb5f]
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sql/vector_mhnsw.cc:731(FVectorNode::load(TABLE*))[0x55ec6204ba54]
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sql/vector_mhnsw.cc:1073(search_layer(MHNSW_Share*, TABLE*, FVector const*, float, unsigned int, unsigned long, Neighborhood*, bool))[0x55ec620502b9]
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sql/vector_mhnsw.cc:1206(mhnsw_insert(TABLE*, st_key*))[0x55ec6205280e]
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sql/sql_base.cc:9919(TABLE::hlindexes_on_insert())[0x55ec610ecca1]
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sql/handler.cc:8163(handler::ha_write_row(unsigned char const*))[0x55ec61c42885]
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sql/sql_insert.cc:2322(write_record(THD*, TABLE*, st_copy_info*, select_result*))[0x55ec611be63e]
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sql/sql_insert.cc:1179(mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*))[0x55ec611b4d6e]
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sql/sql_parse.cc:4458(mysql_execute_command(THD*, bool))[0x55ec61285038]
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sql/sql_parse.cc:7873(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x55ec6129cbfa]
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sql/sql_parse.cc:1894(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x55ec61273c1c]
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sql/sql_parse.cc:1405(do_command(THD*, bool))[0x55ec61270930]
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sql/sql_connect.cc:1448(do_handle_one_connection(CONNECT*, bool))[0x55ec61760189]
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sql/sql_connect.cc:1352(handle_one_connection)[0x55ec6175fb4a]
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perfschema/pfs.cc:2200(pfs_spawn_thread)[0x55ec62403672]
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nptl/pthread_create.c:442(start_thread)[0x7fbecdca8044]
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x86_64/clone3.S:83(clone3)[0x7fbecdd2861c]
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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Query (0x6290000e6238): INSERT INTO t VALUES (11,x'00000000')
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Connection ID (thread ID): 4
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Status: NOT_KILLED
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Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=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=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off,hash_join_cardinality=on,cset_narrowing=on,sargable_casefold=on
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The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/ contains
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information that should help you find out what is causing the crash.
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Writing a core file...
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Working directory at /dev/shm/var_auto_I2Nn/mysqld.1/data
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Resource Limits:
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Limit Soft Limit Hard Limit Units
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Max cpu time unlimited unlimited seconds
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Max file size unlimited unlimited bytes
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Max data size unlimited unlimited bytes
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Max stack size 8388608 unlimited bytes
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Max core file size unlimited unlimited bytes
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Max resident set unlimited unlimited bytes
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Max processes 514730 514730 processes
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Max open files 65536 65536 files
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Max locked memory 16876769280 16876769280 bytes
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Max address space unlimited unlimited bytes
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Max file locks unlimited unlimited locks
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Max pending signals 514730 514730 signals
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Max msgqueue size 819200 819200 bytes
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Max nice priority 0 0
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Max realtime priority 0 0
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Max realtime timeout unlimited unlimited us
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Core pattern: core
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Kernel version: Linux version 6.1.0-13-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.55-1 (2023-09-29)
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non-ASAN RelWithDebInfo |
#2 <signal handler called>
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#3 _mm256_madd_epi16(long long __vector(4), long long __vector(4)) (__B=..., __A=...) at /usr/lib/gcc/x86_64-linux-gnu/12/include/avx2intrin.h:343
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#4 FVector::dot_product(short const*, short const*, unsigned long) [clone .avx_avx2_fma] (v1=0x7f77d4af7c88, v2=0x7f77d4af8040, len=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:137
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#5 0x0000559369905704 in FVector::distance_to (vec_len=<optimized out>, other=<optimized out>, this=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:213
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#6 FVectorNode::distance_to (this=this@entry=0x7f77d4af81c0, other=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:706
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#7 0x00005593699063ae in VisitedSet::create (node=0x7f77d4af81c0, this=0x7f77e40ab5c0) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:842
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#8 search_layer (ctx=<optimized out>, graph=graph@entry=0x7f77d41a5530, target=<optimized out>, threshold=threshold@entry=-1, result_size=result_size@entry=8, layer=layer@entry=0, inout=inout@entry=0x7f77e40ab770, construction=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:1075
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#9 0x000055936990724b in mhnsw_insert (table=0x7f77d4100378, keyinfo=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/vector_mhnsw.cc:1206
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#10 0x00005593694b671f in TABLE::hlindexes_on_insert (this=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_base.cc:9919
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#11 0x00005593697bc61d in handler::ha_write_row (this=0x7f77d4100be0, buf=0x7f77d41007c8 "\376\v") at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/handler.cc:8163
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#12 0x00005593694e5f1d in write_record (thd=thd@entry=0x7f77d4000c68, table=table@entry=0x7f77d4100378, info=info@entry=0x7f77e40aba70, sink=sink@entry=0x0) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_insert.cc:2322
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#13 0x00005593694efbc6 in mysql_insert (thd=thd@entry=0x7f77d4000c68, table_list=<optimized out>, fields=..., values_list=..., update_fields=..., update_values=..., duplic=<optimized out>, ignore=<optimized out>, result=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_insert.cc:1179
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#14 0x000055936952466a in mysql_execute_command (thd=thd@entry=0x7f77d4000c68, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_parse.cc:4458
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#15 0x00005593695287b6 in mysql_parse (thd=0x7f77d4000c68, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_parse.cc:7873
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#16 0x000055936952b02d in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x7f77d4000c68, packet=packet@entry=0x7f77d4008869 "INSERT INTO t VALUES (11,x'00000000')", packet_length=packet_length@entry=37, blocking=blocking@entry=true) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_parse.cc:1991
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#17 0x000055936952cf64 in do_command (thd=0x7f77d4000c68, blocking=blocking@entry=true) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_parse.cc:1405
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#18 0x000055936965c607 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x55936d039948, put_in_cache=put_in_cache@entry=true) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_connect.cc:1448
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#19 0x000055936965c97d in handle_one_connection (arg=arg@entry=0x55936d039948) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/sql/sql_connect.cc:1350
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#20 0x0000559369a1263c in pfs_spawn_thread (arg=0x55936cff21a8) at /data/bld/preview-11.7-bb-11.6-MDEV-32887-vector-rel/storage/perfschema/pfs.cc:2198
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#21 0x00007f77eaaa8044 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
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#22 0x00007f77eab2861c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
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Attachments
Issue Links
- is caused by
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MDEV-34939 vector search in 11.7
- Closed
- relates to
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MDEV-35092 Server crash, hang or ASAN errors in mysql_create_frm_image upon using non-default table options and system variables
- Closed