[fix](cast) fix coredump of cast string of invalid datetime #21350
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Jul 3, 2023
For sql like select cast("627492340" as datetime); the string is an invalid datetime, function DateV2Value<T>::from_date_str cast it as datetime 2062-74-92 23:40:00, with an out-of-range month and day value, which cause memory violation in function DateV2Value<T>::format_datetime when trying to access s_days_in_month.
==256444==ERROR: AddressSanitizer: global-buffer-overflow on address 0x55a7c1a5cff8 at pc 0x55a7e5aa3d2a bp 0x7f3b805f0370 sp 0x7f3b805f0368
READ of size 4 at 0x55a7c1a5cff8 thread T390 (FragmentMgrThre)
#0 0x55a7e5aa3d29 in doris::vectorized::DateV2Value<doris::vectorized::DateTimeV2ValueType>::format_datetime(unsigned int*, bool*) const /home/zcp/repo_center/doris_master/doris/be/src/vec/runtime/vdatetime_value.cpp:1821:31
#1 0x55a7e5aa3052 in doris::vectorized::DateV2Value<doris::vectorized::DateTimeV2ValueType>::from_date_str(char const*, int, int) /home/zcp/repo_center/doris_master/doris/be/src/vec/runtime/vdatetime_value.cpp:1968:5
#2 0x55a7d48f0c49 in bool doris::vectorized::read_datetime_v2_text_impl<unsigned long>(unsigned long&, doris::vectorized::ReadBuffer&, unsigned int) /home/zcp/repo_center/doris_master/doris/be/src/vec/io/io_helper.h:309:19
#3 0x55a7ddb21642 in bool doris::vectorized::try_read_datetime_v2_text<unsigned long>(unsigned long&, doris::vectorized::ReadBuffer&, unsigned int) /home/zcp/repo_center/doris_master/doris/be/src/vec/io/io_helper.h:409:12
#4 0x55a7ddb215ec in bool doris::vectorized::try_parse_impl<doris::vectorized::DataTypeDateTimeV2, unsigned int, void*>(doris::vectorized::DataTypeDateTimeV2::FieldType&, doris::vectorized::ReadBuffer&, DateLUTImpl const*, unsigned int) /home/zcp/repo_center/doris_master/doris/be/src/vec/functions/function_cast.h:839:16
#5 0x55a7ddb21c84 in auto doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto)::operator()<std::integral_constant<bool, false>, std::integral_constant<bool, true>>(void*, auto) const /home/zcp/repo_center/doris_master/doris/be/src/vec/functions/function_cast.h:1340:38
#6 0x55a7ddb216f7 in void* std::__invoke_impl<doris::Status, doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto), std::integral_constant<bool, false>, std::integral_constant<bool, true>>(std::__invoke_other, auto&&, std::integral_constant<bool, false>&&, std::integral_constant<bool, true>&&) /var/local/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:61:14
#7 0x55a7ddb2167f in std::__invoke_result<void*, std::integral_constant<bool, false>, std::integral_constant<bool, true>>::type std::__invoke<doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto), std::integral_constant<bool, false>, std::integral_constant<bool, true>>(void*&&, std::integral_constant<bool, false>&&, std::integral_constant<bool, true>&&) /var/local/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:96:14
#8 0x55a7ddb20d14 in std::__detail::__variant::__gen_vtable_impl<std::__detail::__variant::_Multi_array<std::__detail::__variant::__deduce_visit_result<doris::Status> (*)(doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto)&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&)>, std::integer_sequence<unsigned long, 0ul, 1ul>>::__visit_invoke(doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto)&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&) /var/local/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/variant:1013:11
#9 0x55a7ddb20c15 in decltype(auto) std::__do_visit<std::__detail::__variant::__deduce_visit_result<doris::Status>, doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto), std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>>(auto&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&) /var/local/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/variant:1714:14
#10 0x55a7ddb20b6a in decltype(auto) std::visit<doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*)::'lambda'(void*, auto), std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>>(void*&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&, std::variant<std::integral_constant<bool, false>, std::integral_constant<bool, true>>&&) /var/local/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/variant:1769:9
#11 0x55a7ddb205ff in doris::Status doris::vectorized::ConvertThroughParsing<doris::vectorized::DataTypeString, doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute<void*>(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long, bool, void*) /home/zcp/repo_center/doris_master/doris/be/src/vec/functions/function_cast.h:1321:23
#12 0x55a7ddb1f2c7 in doris::vectorized::FunctionConvertFromString<doris::vectorized::DataTypeDateTimeV2, doris::vectorized::NameCast>::execute_impl(doris::FunctionContext*, doris::vectorized::Block&, std::vector<unsigned long, std::allocator<unsigned long>> const&, unsigned long, unsigned long) /home/zcp/repo_center/doris_master/doris/be/src/vec/functions/function_cast.h:1417:20
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Proposed changes
Issue Number: close #xxx
For sql like
select cast("627492340" as datetime);the string is an invalid datetime, functionDateV2Value<T>::from_date_strcast it as datetime2062-74-92 23:40:00, with an out-of-range month and day value, which cause memory violation in functionDateV2Value<T>::format_datetimewhen trying to access s_days_in_month.Further comments
If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...