clang-18 based UBSAN failure.
/source/mysys/crc32/crc32c_x86.cc:321:53: runtime error: addition of unsigned offset to 0x7fb8873160b0 overflowed to 0x7fb8873160aa
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SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /source/mysys/crc32/crc32c_x86.cc:321:53
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code:
9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 318) size += 16;
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 319) if (size) {
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 320) get_last_two_xmms:
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 321) const __m128i crc2 = crc_out, d = load128(buf + (size - 16));
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 322) __m128i S = load128(reinterpret_cast<const char*>(shuffle128) + size);
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 323) crc_out = _mm_shuffle_epi8(crc_out, S);
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9ec7819c585d (Marko Mäkelä 2024-05-03 15:55:20 +0300 324) S = xor128(S, _mm_set1_epi32(0x80808080));
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Looks like it was jumped to by get_last_two_xmms in the processing of the last 32 bytes.
2024-07-04 14:41:42 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
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2024-07-04 14:41:42 0 [Note] InnoDB: Completed initialization of buffer pool
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2024-07-04 14:41:42 0 [Note] InnoDB: Setting log file ./ib_logfile101 size to 10485760 bytes
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/home/dan/repos/mariadb-server-rebase/mysys/crc32/crc32c_x86.cc:321:53: runtime error: addition of unsigned offset to 0x5190000075f0 overflowed to 0x5190000075ec
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Thread 1 hit Breakpoint 1, crc32_avx512 (crc=<optimized out>, buf=0x5190000075f0 "", size=12, tab=<optimized out>) at /home/dan/repos/mariadb-server-rebase/mysys/crc32/crc32c_x86.cc:321
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321 const __m128i crc2 = crc_out, d = load128(buf + (size - 16));
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(rr) bt
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#0 crc32_avx512 (crc=<optimized out>, buf=0x5190000075f0 "", size=12, tab=<optimized out>) at /home/dan/repos/mariadb-server-rebase/mysys/crc32/crc32c_x86.cc:321
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#1 0x00000000026a09ab in ut_crc32 (s=0x519000007400 "PHYS", size=508) at /home/dan/repos/mariadb-server-rebase/storage/innobase/include/ut0crc32.h:34
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#2 log_block_calc_checksum_crc32 (block=0x519000007400 "PHYS") at /home/dan/repos/mariadb-server-rebase/storage/innobase/include/log0log.inl:196
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#3 log_block_store_checksum (block=0x519000007400 "PHYS") at /home/dan/repos/mariadb-server-rebase/storage/innobase/log/log0log.cc:488
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#4 log_t::file::write_header_durable (this=<optimized out>, lsn=<optimized out>) at /home/dan/repos/mariadb-server-rebase/storage/innobase/log/log0log.cc:508
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#5 0x00000000028d1bbe in create_log_file (create_new_db=<optimized out>, lsn=<optimized out>, logfile0=<optimized out>)
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at /home/dan/repos/mariadb-server-rebase/storage/innobase/srv/srv0start.cc:325
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#6 0x00000000028cc718 in srv_start (create_new_db=true) at /home/dan/repos/mariadb-server-rebase/storage/innobase/srv/srv0start.cc:1331
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#7 0x000000000256cc1d in innodb_init (p=<optimized out>) at /home/dan/repos/mariadb-server-rebase/storage/innobase/handler/ha_innodb.cc:4074
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#8 0x000000000181f471 in ha_initialize_handlerton (plugin=0x52100002b810) at /home/dan/repos/mariadb-server-rebase/sql/handler.cc:651
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#9 0x0000000000cb23fa in plugin_do_initialize (plugin=0x52100002b810, state=<optimized out>) at /home/dan/repos/mariadb-server-rebase/sql/sql_plugin.cc:1451
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#10 0x0000000000cb1a7f in plugin_initialize (tmp_root=tmp_root@entry=0x7faf2db10110, plugin=plugin@entry=0x52100002b810, argc=argc@entry=0x53e0440 <remaining_argc>,
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argv=argv@entry=0x5160000000f8, options_only=false) at /home/dan/repos/mariadb-server-rebase/sql/sql_plugin.cc:1504
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#11 0x0000000000cb1026 in plugin_init (argc=<optimized out>, argv=<optimized out>, flags=1) at /home/dan/repos/mariadb-server-rebase/sql/sql_plugin.cc:1761
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#12 0x0000000000816b0d in init_server_components () at /home/dan/repos/mariadb-server-rebase/sql/mysqld.cc:4982
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#13 0x0000000000810383 in mysqld_main (argc=<optimized out>, argv=<optimized out>) at /home/dan/repos/mariadb-server-rebase/sql/mysqld.cc:5573
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#14 0x00007faf2f63d088 in __libc_start_call_main () from /lib64/libc.so.6
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#15 0x00007faf2f63d14b in __libc_start_main_impl () from /lib64/libc.so.6
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#16 0x000000000072ee95 in _start ()
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SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/dan/repos/mariadb-server-rebase/mysys/crc32/crc32c_x86.cc:321:53
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MDBF-741 Remove the gcc UBSAN builder to use the clang based UBSAN
MDEV-25454 Make MariaDB server UBSAN safe