WARNING: MemorySanitizer: use-of-uninitialized-value

[cyw0ng95]

Encounter an error when running a self-developed fuzzing tool, but this error seems not related to the fuzzing process, but only during init.

root@46ed3b2e2c71:/opt# ./output/duckdb_embedded_executor 
10/30 17:16:15 [INFO] Starting duckdb_embedded executor
Uninitialized bytes in strlen at offset 0 inside [0x7ffd0caa8a08, 5)
==5748==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x0000011341ac in unsigned long duckdb::Hash<char const*>(char const*) (/opt/output/duckdb_embedded_executor+0x11341ac) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #1 0x000000fa1b53 in duckdb::LogicalDependencyHashFunction::operator()(duckdb::LogicalDependency const&) const (/opt/output/duckdb_embedded_executor+0xfa1b53) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #2 0x000000fbbc91 in std::pair<std::__detail::_Node_iterator<duckdb::LogicalDependency, true, true>, bool> std::_Hashtable<duckdb::LogicalDependency, duckdb::LogicalDependency, std::allocator<duckdb::LogicalDependency>, std::__detail::_Identity, duckdb::LogicalDependencyEquality, duckdb::LogicalDependencyHashFunction, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, true, true>>::_M_insert<duckdb::LogicalDependency const&, std::__detail::_AllocNode<std::allocator<std::__detail::_Hash_node<duckdb::LogicalDependency, true>>>>(duckdb::LogicalDependency const&, std::__detail::_AllocNode<std::allocator<std::__detail::_Hash_node<duckdb::LogicalDependency, true>>> const&, std::integral_constant<bool, true>, unsigned long) (/opt/output/duckdb_embedded_executor+0xfbbc91) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #3 0x000000fb2ca7 in duckdb::LogicalDependencyList::AddDependency(duckdb::CatalogEntry&) (/opt/output/duckdb_embedded_executor+0xfb2ca7) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #4 0x000000fc65cc in duckdb::DuckSchemaEntry::AddEntryInternal(duckdb::CatalogTransaction, duckdb::unique_ptr<duckdb::StandardEntry, std::default_delete<duckdb::StandardEntry>, true>, duckdb::OnCreateConflict, duckdb::LogicalDependencyList) (/opt/output/duckdb_embedded_executor+0xfc65cc) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #5 0x000000fc69b0 in duckdb::DuckSchemaEntry::AddEntry(duckdb::CatalogTransaction, duckdb::unique_ptr<duckdb::StandardEntry, std::default_delete<duckdb::StandardEntry>, true>, duckdb::OnCreateConflict) (/opt/output/duckdb_embedded_executor+0xfc69b0) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #6 0x000000fc6f3b in duckdb::DuckSchemaEntry::CreateTableFunction(duckdb::CatalogTransaction, duckdb::CreateTableFunctionInfo&) (/opt/output/duckdb_embedded_executor+0xfc6f3b) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #7 0x0000018099a3 in duckdb::BuiltinFunctions::AddFunction(duckdb::TableFunctionSet) (/opt/output/duckdb_embedded_executor+0x18099a3) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #8 0x0000017c7f6b in duckdb::TableScanFunction::RegisterFunction(duckdb::BuiltinFunctions&) (/opt/output/duckdb_embedded_executor+0x17c7f6b) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #9 0x000001807b73 in duckdb::BuiltinFunctions::Initialize() (/opt/output/duckdb_embedded_executor+0x1807b73) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #10 0x000000fa0e9f in duckdb::DuckCatalog::Initialize(bool) (/opt/output/duckdb_embedded_executor+0xfa0e9f) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #11 0x000001812335 in duckdb::AttachedDatabase::Initialize(duckdb::optional_idx) (/opt/output/duckdb_embedded_executor+0x1812335) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #12 0x000001814bb2 in duckdb::DatabaseManager::InitializeSystemCatalog() (/opt/output/duckdb_embedded_executor+0x1814bb2) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #13 0x00000184af4b in duckdb::DatabaseInstance::Initialize(char const*, duckdb::DBConfig*) (/opt/output/duckdb_embedded_executor+0x184af4b) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #14 0x00000184b2ee in duckdb::DuckDB::DuckDB(char const*, duckdb::DBConfig*) (/opt/output/duckdb_embedded_executor+0x184b2ee) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #15 0x000000c9871b in duckdb_open_ext (/opt/output/duckdb_embedded_executor+0xc9871b) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8)
    #16 0x000000c8f528 in _cgo_b59e10b900ff_Cfunc_duckdb_open_ext /tmp/go-build/cgo-gcc-prolog:123:11
    #17 0x0000007fd063 in runtime.asmcgocall.abi0 /root/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.24.9.linux-amd64/src/runtime/asm_amd64.s:923

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/opt/output/duckdb_embedded_executor+0x11341ac) (BuildId: e48e79d4f034eae61580f6c2d46f82799f9874e8) in unsigned long duckdb::Hash<char const*>(char const*)
Exiting

[taniabogatsch]

Hi @cyw0ng95 , cool! That looks like an error in DuckDB, not in the driver - could you maybe open it over at duckdb/duckdb with the steps to reproduce it, so we can pick it up? :)