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MemorySanitizer: use-of-uninitialized-value (STID: 1003-358c) #101232

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#101239
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MemorySanitizer: use-of-uninitialized-value (STID: 1003-358c)#101232
#101239
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alexey-milovidov
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fuzzProblem found by one of the fuzzerssanitizertestingSpecial issue with list of bugs found by CI
@PedroTadim

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@PedroTadim
PedroTadim
opened on Mar 30, 2026

Important: This issue was automatically generated and is used by CI for matching failures. DO NOT modify the body content. DO NOT remove labels.

Test name: MemorySanitizer: use-of-uninitialized-value (STID: 1003-358c)
CI report: Stress test (arm_msan)
Failing test history: cidb

Test output:

Log files: clickhouse-server.err.log, stderr.log
Error:
WARNING: MemorySanitizer: use-of-uninitialized-value
---

Stack trace:
#0 0xaba21d458964 in simsimd_cos_f32_sve ci/tmp/build/./contrib/SimSIMD/include/simsimd/spatial.h:818:26
#1 0xaba21d452810 in simsimd_cos_f32 ci/tmp/build/./contrib/SimSIMD/c/lib.c:185:1
#2 0xaba21d452810 in simsimd_capabilities ci/tmp/build/./contrib/SimSIMD/c/lib.c:322:5
#3 0xaba20f05af60 in unum::usearch::metric_punned_t::configure_with_simsimd() ci/tmp/build/./contrib/usearch/include/usearch/index_plugins.hpp:1929:59
#4 0xaba20f05af60 in unum::usearch::metric_punned_t::builtin(unsigned long, unum::usearch::metric_kind_t, unum::usearch::scalar_kind_t) ci/tmp/build/./contrib/usearch/include/usearch/index_plugins.hpp:1779:21
#5 0xaba20f05af60 in unum::usearch::metric_punned_t::metric_punned_t(unsigned long, unum::usearch::metric_kind_t, unum::usearch::scalar_kind_t) ci/tmp/build/./contrib/usearch/include/usearch/index_plugins.hpp:1752:27
#6 0xaba20f05af60 in DB::USearchIndexWithSerialization::USearchIndexWithSerialization(unsigned long, unum::usearch::metric_kind_t, unum::usearch::scalar_kind_t, DB::UsearchHnswParams) ci/tmp/build/./src/Storages/MergeTree/MergeTreeIndexVectorSimilarity.cpp:117:28
#7 0xaba20f077460 in DB::USearchIndexWithSerialization* std::__1::construct_at[abi:fe210105]<DB::USearchIndexWithSerialization, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, DB::USearchIndexWithSerialization*>(DB::USearchIndexWithSerialization*, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/construct_at.h:38:49
#8 0xaba20f077460 in DB::USearchIndexWithSerialization* std::__1::__construct_at[abi:fe210105]<DB::USearchIndexWithSerialization, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, DB::USearchIndexWithSerialization*>(DB::USearchIndexWithSerialization*, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/construct_at.h:46:10
#9 0xaba20f077460 in void std::__1::allocator_traits<std::__1::allocator<DB::USearchIndexWithSerialization>>::construct[abi:fe210105]<DB::USearchIndexWithSerialization, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, 0>(std::__1::allocator<DB::USearchIndexWithSerialization>&, DB::USearchIndexWithSerialization*, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/allocator_traits.h:302:5
#10 0xaba20f077460 in std::__1::__shared_ptr_emplace<DB::USearchIndexWithSerialization, std::__1::allocator<DB::USearchIndexWithSerialization>>::__shared_ptr_emplace[abi:fe210105]<unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, std::__1::allocator<DB::USearchIndexWithSerialization>, 0>(std::__1::allocator<DB::USearchIndexWithSerialization>, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/shared_ptr.h:162:5
#11 0xaba20f077460 in std::__1::shared_ptr<DB::USearchIndexWithSerialization> std::__1::allocate_shared[abi:fe210105]<DB::USearchIndexWithSerialization, std::__1::allocator<DB::USearchIndexWithSerialization>, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, 0>(std::__1::allocator<DB::USearchIndexWithSerialization> const&, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/shared_ptr.h:736:51
#12 0xaba20f077460 in std::__1::shared_ptr<DB::USearchIndexWithSerialization> std::__1::make_shared[abi:fe210105]<DB::USearchIndexWithSerialization, unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&, 0>(unsigned long const&, unum::usearch::metric_kind_t const&, unum::usearch::scalar_kind_t const&, DB::UsearchHnswParams const&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__memory/shared_ptr.h:744:10
#13 0xaba20f066f2c in DB::MergeTreeIndexAggregatorVectorSimilarity::update(DB::Block const&, unsigned long*, unsigned long) ci/tmp/build/./src/Storages/MergeTree/MergeTreeIndexVectorSimilarity.cpp:411:17
#14 0xaba20eddcd80 in DB::MergeTreeDataPartWriterOnDisk::calculateAndSerializeSkipIndices(DB::Block const&, std::__1::vector<DB::Granule, std::__1::allocator<DB::Granule>> const&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeDataPartWriterOnDisk.cpp:260:42
#15 0xaba20edf3028 in DB::MergeTreeDataPartWriterWide::write(DB::Block const&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul> const*) ci/tmp/build/./src/Storages/MergeTree/MergeTreeDataPartWriterWide.cpp:385:5
#16 0xaba20f35c5ec in DB::MergedBlockOutputStream::writeImpl(DB::Block const&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul> const*) ci/tmp/build/./src/Storages/MergeTree/MergedBlockOutputStream.cpp:441:13
#17 0xaba20f35c5ec in DB::MergedBlockOutputStream::writeWithPermutation(DB::Block const&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul> const*) ci/tmp/build/./src/Storages/MergeTree/MergedBlockOutputStream.cpp:105:5
#18 0xaba20ee92774 in DB::MergeTreeDataWriter::writeTempPartImpl(DB::BlockWithPartition&, std::__1::shared_ptr<DB::StorageInMemoryMetadata const>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, DB::SourcePartsSetForPatch, std::__1::shared_ptr<DB::Context const>, unsigned long) ci/tmp/build/./src/Storages/MergeTree/MergeTreeDataWriter.cpp:908:10
#19 0xaba20ee8945c in DB::MergeTreeDataWriter::writeTempPart(DB::BlockWithPartition&, std::__1::shared_ptr<DB::StorageInMemoryMetadata const>, std::__1::shared_ptr<DB::Context const>) ci/tmp/build/./src/Storages/MergeTree/MergeTreeDataWriter.cpp:588:12
#20 0xaba20f31d524 in DB::MergeTreeSink::consume(DB::Chunk&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeSink.cpp:144:25
#21 0xaba21120172c in DB::SinkToStorage::onConsume(DB::Chunk) ci/tmp/build/./src/Processors/Sinks/SinkToStorage.cpp:10:5
#22 0xaba210e2b9d4 in DB::ExceptionKeepingTransform::work()::$_1::operator()() const ci/tmp/build/./src/Processors/Transforms/ExceptionKeepingTransform.cpp:136:51
#23 0xaba210e2b9d4 in std::__1::__invoke_result_impl<void, DB::ExceptionKeepingTransform::work()::$_1&>::type std::__1::__invoke[abi:fe210105]<DB::ExceptionKeepingTransform::work()::$_1&>(DB::ExceptionKeepingTransform::work()::$_1&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:87:27
#24 0xaba210e2b9d4 in void std::__1::__invoke_void_return_wrapper<void, true>::__call[abi:fe210105]<DB::ExceptionKeepingTransform::work()::$_1&>(DB::ExceptionKeepingTransform::work()::$_1&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:342:5
#25 0xaba210e2b9d4 in void std::__1::__invoke_r[abi:fe210105]<void, DB::ExceptionKeepingTransform::work()::$_1&>(DB::ExceptionKeepingTransform::work()::$_1&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:348:10
#26 0xaba210e2b9d4 in void std::__1::__function::__policy_func<void ()>::__call_func[abi:fe210105]<DB::ExceptionKeepingTransform::work()::$_1>(std::__1::__function::__policy_storage const*) ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:450:12
#27 0xaba210e2b2ec in std::__1::__function::__policy_func<void ()>::operator()[abi:fe210105]() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:508:12
#28 0xaba210e2b2ec in std::__1::function<void ()>::operator()() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:772:10
#29 0xaba210e2b2ec in DB::runStep(std::__1::function<void ()>, std::__1::shared_ptr<DB::ThreadGroup>&) ci/tmp/build/./src/Processors/Transforms/ExceptionKeepingTransform.cpp:105:9
#30 0xaba210e2a4b4 in DB::ExceptionKeepingTransform::work() ci/tmp/build/./src/Processors/Transforms/ExceptionKeepingTransform.cpp:136:34
#31 0xaba210589af4 in DB::executeJob(DB::ExecutingGraph::Node*, DB::ReadProgressCallback*) ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:53:26
#32 0xaba210589af4 in DB::ExecutionThreadContext::executeTask() ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:102:9
#33 0xaba21055c250 in DB::PipelineExecutor::executeStepImpl(unsigned long, DB::IAcquiredSlot*, std::__1::atomic<bool>*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:351:26
#34 0xaba210561230 in DB::PipelineExecutor::executeSingleThread(unsigned long, DB::IAcquiredSlot*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:279:5
#35 0xaba210561230 in DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0::operator()() const ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:565:17
#36 0xaba210561230 in std::__1::__invoke_result_impl<void, DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&>::type std::__1::__invoke[abi:fe210105]<DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&>(DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:87:27
#37 0xaba210561230 in void std::__1::__invoke_void_return_wrapper<void, true>::__call[abi:fe210105]<DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&>(DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:342:5
#38 0xaba210561230 in void std::__1::__invoke_r[abi:fe210105]<void, DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&>(DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:348:10
#39 0xaba210561230 in void std::__1::__function::__policy_func<void ()>::__call_func[abi:fe210105]<DB::PipelineExecutor::spawnThreads(std::__1::shared_ptr<DB::IAcquiredSlot>)::$_0>(std::__1::__function::__policy_storage const*) ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:450:12
#40 0xaba1efa2b7b4 in std::__1::__function::__policy_func<void ()>::operator()[abi:fe210105]() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:508:12
#41 0xaba1efa2b7b4 in std::__1::function<void ()>::operator()() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:772:10
#42 0xaba1efa2b7b4 in ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::worker() ci/tmp/build/./src/Common/ThreadPool.cpp:799:17
#43 0xaba1efa3c058 in std::__1::__invoke_result_impl<void, void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*&>::type std::__1::__invoke[abi:fe210105]<void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*&>(void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h
#44 0xaba1efa3c058 in decltype(auto) std::__1::__apply_tuple_impl[abi:fe210105]<void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), std::__1::tuple<ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*>&, 0ul>(void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), std::__1::tuple<ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*>&, std::__1::__tuple_indices<0ul>) ci/tmp/build/./contrib/llvm-project/libcxx/include/tuple:1380:5
#45 0xaba1efa3c058 in decltype(auto) std::__1::apply[abi:fe210105]<void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), std::__1::tuple<ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*>&>(void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&)(), std::__1::tuple<ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*>&) ci/tmp/build/./contrib/llvm-project/libcxx/include/tuple:1384:5
#46 0xaba1efa3c058 in ThreadFromGlobalPoolImpl<false, true>::ThreadFromGlobalPoolImpl<void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*)(), ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*>(void (ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool::*&&)(), ThreadPoolImpl<ThreadFromGlobalPoolImpl<false, true>>::ThreadFromThreadPool*&&)::'lambda'()::operator()() ci/tmp/build/./src/Common/ThreadPool.h:312:13
#47 0xaba1efa24c34 in std::__1::__function::__policy_func<void ()>::operator()[abi:fe210105]() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:508:12
#48 0xaba1efa24c34 in std::__1::function<void ()>::operator()() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:772:10
#49 0xaba1efa24c34 in ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::worker() ci/tmp/build/./src/Common/ThreadPool.cpp:809:17
#50 0xaba1efa360f8 in std::__1::__invoke_result_impl<void, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>::type std::__1::__invoke[abi:fe210105]<void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>(void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*&&)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*&&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h
#51 0xaba1efa360f8 in void std::__1::__thread_execute[abi:fe210105]<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*, 2ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>&, std::__1::__tuple_indices<2ul>) ci/tmp/build/./contrib/llvm-project/libcxx/include/__thread/thread.h:159:3
#52 0xaba1efa360f8 in void* std::__1::__thread_proxy[abi:fe210105]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>>(void*) ci/tmp/build/./contrib/llvm-project/libcxx/include/__thread/thread.h:168:3
#53 0xffd1188a0394 in start_thread nptl/pthread_create.c:442:8
#54 0xffd118909e98  misc/../sysdeps/unix/sysv/linux/aarch64/clone.S:79

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