The test parts.longname that I extended for MDEV-22817 revealed another error that was introduced in MDEV-16678:
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10.5 0e69f601aaafb920a9305c4ab5d380de2b43e917
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==113772==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7f8718ff4b21 at pc 0x7f872870157d bp 0x7f8718ff47f0 sp 0x7f8718ff3f98
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WRITE of size 394 at 0x7f8718ff4b21 thread T15
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#0 0x7f872870157c (/lib/x86_64-linux-gnu/libasan.so.5+0x9b57c)
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#1 0x558391fc45d0 in bool dict_table_t::parse_name<true>(char (&) [193], char (&) [193], unsigned long*, unsigned long*) const /home/buildbot/buildbot/build/mariadb-10.5.4/storage/innobase/dict/dict0dict.cc:751
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#2 0x558391fc49c2 in dict_table_t* dict_acquire_mdl_shared<false>(dict_table_t*, THD*, MDL_ticket**, dict_table_op_t) /home/buildbot/buildbot/build/mariadb-10.5.4/storage/innobase/dict/dict0dict.cc:819
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#3 0x558391faff5a in dict_table_open_on_id(unsigned long, bool, dict_table_op_t, THD*, MDL_ticket**) /home/buildbot/buildbot/build/mariadb-10.5.4/storage/innobase/dict/dict0dict.cc:955
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The problem is that we are copying the entire table name (with partition and subpartition names) to the buffer, and only then stripping the partition and subpartition components.
- is caused by
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MDEV-16678
Use MDL for innodb background threads instead of dict_operation_lock
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Bug
Major