Bump the pip group across 1 directory with 10 updates - #15
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--- updated-dependencies: - dependency-name: babel dependency-type: direct:production dependency-group: pip - dependency-name: certifi dependency-type: direct:production dependency-group: pip - dependency-name: flask dependency-type: direct:production dependency-group: pip - dependency-name: idna dependency-type: direct:production dependency-group: pip - dependency-name: jinja2 dependency-type: direct:production dependency-group: pip - dependency-name: pyyaml dependency-type: direct:production dependency-group: pip - dependency-name: requests dependency-type: direct:production dependency-group: pip - dependency-name: tornado dependency-type: direct:production dependency-group: pip - dependency-name: urllib3 dependency-type: direct:production dependency-group: pip - dependency-name: werkzeug dependency-type: direct:production dependency-group: pip ... Signed-off-by: dependabot[bot] <support@github.com>
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…tion fault https://perconadev.atlassian.net/browse/PS-9719 Problem ------- When changing binlog_transaction_dependency_tracking in high load workload, MySQL can get a segmentation fault. Analysis -------- Address sanitizer runs exposed the heap-use-after-free. READ of size 8 at 0x6030002c3298 thread T52 #0 _M_hash_code() #1 _M_bucket_index() .. #7 std::unordered_map::insert() #8 Writeset_trx_dependency_tracker::get_dependency() #9 Transaction_dependency_tracker::get_dependency() #10 MYSQL_BIN_LOG::write_transaction() #11 binlog_cache_data::flush() #12 binlog_cache_mngr::flush() #13 MYSQL_BIN_LOG::flush_thread_caches() #14 MYSQL_BIN_LOG::process_flush_stage_queue() #15 MYSQL_BIN_LOG::ordered_commit() #16 MYSQL_BIN_LOG::commit() freed by thread T49 here: #0 operator delete() ... #7 std::unordered_map::clear() #8 Writeset_trx_dependency_tracker::rotate(long) #9 Transaction_dependency_tracker::tracking_mode_changed() #10 update_binlog_transaction_dependency_tracking #11 sys_var::update() - The Writeset_trx_dependency_tracker uses std::unordered_map for storing depdendency information. - When a transaction is committing, the committing thread inserts the dependency information to this map in through get_dependency(). - When the tracking mode is changed, then the map is cleared by Writeset_trx_dependency_tracker::rotate(). Note that no lock/mutex is taken during the rotation. - As the rotate() and get_dependency() operations can be concurrently called from different threads and there is no mutex protection to handle it, it can result in segmentation fault when the get_dependency() tries to insert to the already deleted map. Solution -------- Use std::shared_ptr with atomic load/store for safer dependency tracker map rotation. - Replaced direct usage of of map with std::shared_ptr in the Writeset_trx_dependency_tracker class. - Modified the implementation of rotate() to used std::atomic_load and std::atomic_store to enable thread-safe reads and rotations. With the new solution the rotation happens in an atomic manner. So that transactions calling get_dependency() always use the object returned by shared_ptr. So, even if rotate() happens in parallel, the memory won't be freed until all readers are done.
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Bumps the pip group with 10 updates in the /extra/libcbor/doc/source directory:
2.8.02.9.12019.11.282023.7.221.1.12.2.52.93.72.10.13.1.45.35.42.23.02.32.06.0.46.3.31.25.81.26.180.15.53.0.3Updates
babelfrom 2.8.0 to 2.9.1Release notes
Sourced from babel's releases.
Changelog
Sourced from babel's changelog.