Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29782

azat · 2021-10-05T18:08:37Z

Changelog category (leave one):

Bug Fix (user-visible misbehaviour in official stable or prestable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV).

Detailed description / Documentation draft:
The problem is that GROUP BY can update saved_hash, which can be also
updated by subsequent update of a dictionary, and this will lead to
use-after-free.

You will find ASan report in details.

Details

==24679==ERROR: AddressSanitizer: heap-use-after-free on address 0x604000615d20 at pc 0x000022cc8684 bp 0x7ffea6b5f850 sp 0x7ffea6b5f848
READ of size 8 at 0x604000615d20 thread T223 (QueryPipelineEx)
    0 0x22cc8683 in DB::ReverseIndex<>::insert(StringRef const&) obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h
    1 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>()::'lambda'()::operator()() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:540:39
    2 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:570:23
    3 0x22cb9c66 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom()::'lambda'(auto)::operator()<char8_t>(auto) const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:592:26
    4 0x22cb9c66 in DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:600:28
    5 0x2500b897 in DB::ColumnLowCardinality::insertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnLowCardinality.cpp:205:62
    6 0x25a182f4 in DB::appendBlock(DB::Block const&, DB::Block&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:470:23
    7 0x25a182f4 in DB::BufferSink::insertIntoBuffer(DB::Block const&, DB::StorageBuffer::Buffer&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:634:9
    8 0x25a173cc in DB::BufferSink::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:595:9
    9 0x26d1c997 in DB::SinkToStorage::transform(DB::Chunk&) obj-x86_64-linux-gnu/../src/Processors/Sinks/SinkToStorage.cpp:18:5

0x604000615d20 is located 16 bytes inside of 40-byte region [0x604000615d10,0x604000615d38)
freed by thread T37 (QueryPipelineEx) here:
    2 0x22cb9392 in boost::intrusive_ptr<DB::ColumnVector<unsigned long> >::~intrusive_ptr() obj-x86_64-linux-gnu/../contrib/boost/boost/smart_ptr/intrusive_ptr.hpp:98:23
    4 0x22cb9392 in COW<DB::IColumn>::mutable_ptr<DB::ColumnVector<unsigned long> >::operator=() obj-x86_64-linux-gnu/../src/Common/COW.h:100:57
    5 0x22cb9392 in DB::ReverseIndex<>::tryGetSavedHash() const obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:362:28
    6 0x22cb9392 in DB::ColumnUnique<DB::ColumnString>::tryGetSavedHash() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:125:76
    7 0x242eaed3 in DB::ColumnsHashing::HashMethodSingleLowCardinalityColumn<>::HashMethodSingleLowCardinalityColumn() obj-x86_64-linux-gnu/../src/Common/ColumnsHashing.h:287:50
    8 0x242206c6 in void DB::Aggregator::executeImpl<>() const obj-x86_64-linux-gnu/../src/Interpreters/Aggregator.cpp:596:28
    9 0x24148e99 in DB::Aggregator::executeOnBlock() const obj-x86_64-linux-gnu/../src/Interpreters/Aggregator.cpp:1004:9
    10 0x26c24f3a in DB::AggregatingTransform::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Processors/Transforms/AggregatingTransform.cpp:539:33
    11 0x26c2054e in DB::AggregatingTransform::work() obj-x86_64-linux-gnu/../src/Processors/Transforms/AggregatingTransform.cpp:500:9

previously allocated by thread T37 (QueryPipelineEx) here:
    0 0xb6d44fd in operator new(unsigned long) (/src/ch/tmp/upstream/clickhouse-asan+0xb6d44fd)
    1 0x11b78580 in COW<DB::IColumn>::mutable_ptr<> COWHelper<>::create<unsigned long&>(unsigned long&) (/src/ch/tmp/upstream/clickhouse-asan+0x11b78580)
    2 0x22cbf7b1 in DB::ReverseIndex<>::calcHashes() const obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:472:17
    3 0x22cc2307 in DB::ReverseIndex<>::buildIndex() obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:438:22
    4 0x22cc658c in DB::ReverseIndex<>::insert(StringRef const&) obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:484:9
    5 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>()::'lambda'()::operator()() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:540:39
    6 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:570:23
    7 0x22cb9c66 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom()::'lambda'(auto)::operator()<char8_t>(auto) const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:592:26
    8 0x22cb9c66 in DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:600:28
    9 0x2500b897 in DB::ColumnLowCardinality::insertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnLowCardinality.cpp:205:62
    10 0x25a182f4 in DB::appendBlock(DB::Block const&, DB::Block&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:470:23
    11 0x25a182f4 in DB::BufferSink::insertIntoBuffer(DB::Block const&, DB::StorageBuffer::Buffer&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:634:9
    12 0x25a173cc in DB::BufferSink::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:595:9
    13 0x26d1c997 in DB::SinkToStorage::transform(DB::Chunk&) obj-x86_64-linux-gnu/../src/Processors/Sinks/SinkToStorage.cpp:18:5

SUMMARY: AddressSanitizer: heap-use-after-free obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h in DB::ReverseIndex<unsigned long, DB::ColumnString>::insert(StringRef const&)
Shadow bytes around the buggy address:
  0x0c08800bab50: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 00
  0x0c08800bab60: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa
  0x0c08800bab70: fa fa 00 00 00 00 00 00 fa fa 00 00 00 00 00 00
  0x0c08800bab80: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fa
  0x0c08800bab90: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
=>0x0c08800baba0: fa fa fd fd[fd]fd fd fa fa fa fd fd fd fd fd fa
  0x0c08800babb0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
  0x0c08800babc0: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
  0x0c08800babd0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
  0x0c08800babe0: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
  0x0c08800babf0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==24679==ABORTING

Fixes: #3138 ( cc @KochetovNicolai )
Fixes: #24158

…SEGV) The problem is that GROUP BY can update saved_hash, which can be also updated by subsequent update of a dictionary, and this will lead to use-after-free. You will find ASan report in `details`. <details> ==24679==ERROR: AddressSanitizer: heap-use-after-free on address 0x604000615d20 at pc 0x000022cc8684 bp 0x7ffea6b5f850 sp 0x7ffea6b5f848 READ of size 8 at 0x604000615d20 thread T223 (QueryPipelineEx) 0 0x22cc8683 in DB::ReverseIndex<>::insert(StringRef const&) obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h 1 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>()::'lambda'()::operator()() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:540:39 2 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:570:23 3 0x22cb9c66 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom()::'lambda'(auto)::operator()<char8_t>(auto) const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:592:26 4 0x22cb9c66 in DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:600:28 5 0x2500b897 in DB::ColumnLowCardinality::insertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnLowCardinality.cpp:205:62 6 0x25a182f4 in DB::appendBlock(DB::Block const&, DB::Block&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:470:23 7 0x25a182f4 in DB::BufferSink::insertIntoBuffer(DB::Block const&, DB::StorageBuffer::Buffer&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:634:9 8 0x25a173cc in DB::BufferSink::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:595:9 9 0x26d1c997 in DB::SinkToStorage::transform(DB::Chunk&) obj-x86_64-linux-gnu/../src/Processors/Sinks/SinkToStorage.cpp:18:5 0x604000615d20 is located 16 bytes inside of 40-byte region [0x604000615d10,0x604000615d38) freed by thread T37 (QueryPipelineEx) here: 2 0x22cb9392 in boost::intrusive_ptr<DB::ColumnVector<unsigned long> >::~intrusive_ptr() obj-x86_64-linux-gnu/../contrib/boost/boost/smart_ptr/intrusive_ptr.hpp:98:23 4 0x22cb9392 in COW<DB::IColumn>::mutable_ptr<DB::ColumnVector<unsigned long> >::operator=() obj-x86_64-linux-gnu/../src/Common/COW.h:100:57 5 0x22cb9392 in DB::ReverseIndex<>::tryGetSavedHash() const obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:362:28 6 0x22cb9392 in DB::ColumnUnique<DB::ColumnString>::tryGetSavedHash() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:125:76 7 0x242eaed3 in DB::ColumnsHashing::HashMethodSingleLowCardinalityColumn<>::HashMethodSingleLowCardinalityColumn() obj-x86_64-linux-gnu/../src/Common/ColumnsHashing.h:287:50 8 0x242206c6 in void DB::Aggregator::executeImpl<>() const obj-x86_64-linux-gnu/../src/Interpreters/Aggregator.cpp:596:28 9 0x24148e99 in DB::Aggregator::executeOnBlock() const obj-x86_64-linux-gnu/../src/Interpreters/Aggregator.cpp:1004:9 10 0x26c24f3a in DB::AggregatingTransform::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Processors/Transforms/AggregatingTransform.cpp:539:33 11 0x26c2054e in DB::AggregatingTransform::work() obj-x86_64-linux-gnu/../src/Processors/Transforms/AggregatingTransform.cpp:500:9 previously allocated by thread T37 (QueryPipelineEx) here: 0 0xb6d44fd in operator new(unsigned long) (/src/ch/tmp/upstream/clickhouse-asan+0xb6d44fd) 1 0x11b78580 in COW<DB::IColumn>::mutable_ptr<> COWHelper<>::create<unsigned long&>(unsigned long&) (/src/ch/tmp/upstream/clickhouse-asan+0x11b78580) 2 0x22cbf7b1 in DB::ReverseIndex<>::calcHashes() const obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:472:17 3 0x22cc2307 in DB::ReverseIndex<>::buildIndex() obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:438:22 4 0x22cc658c in DB::ReverseIndex<>::insert(StringRef const&) obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h:484:9 5 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>()::'lambda'()::operator()() const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:540:39 6 0x22cc0de1 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeImpl<char8_t>() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:570:23 7 0x22cb9c66 in COW<DB::IColumn>::mutable_ptr<DB::IColumn> DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom()::'lambda'(auto)::operator()<char8_t>(auto) const obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:592:26 8 0x22cb9c66 in DB::ColumnUnique<DB::ColumnString>::uniqueInsertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnUnique.h:600:28 9 0x2500b897 in DB::ColumnLowCardinality::insertRangeFrom() obj-x86_64-linux-gnu/../src/Columns/ColumnLowCardinality.cpp:205:62 10 0x25a182f4 in DB::appendBlock(DB::Block const&, DB::Block&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:470:23 11 0x25a182f4 in DB::BufferSink::insertIntoBuffer(DB::Block const&, DB::StorageBuffer::Buffer&) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:634:9 12 0x25a173cc in DB::BufferSink::consume(DB::Chunk) obj-x86_64-linux-gnu/../src/Storages/StorageBuffer.cpp:595:9 13 0x26d1c997 in DB::SinkToStorage::transform(DB::Chunk&) obj-x86_64-linux-gnu/../src/Processors/Sinks/SinkToStorage.cpp:18:5 SUMMARY: AddressSanitizer: heap-use-after-free obj-x86_64-linux-gnu/../src/Columns/ReverseIndex.h in DB::ReverseIndex<unsigned long, DB::ColumnString>::insert(StringRef const&) Shadow bytes around the buggy address: 0x0c08800bab50: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 00 0x0c08800bab60: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa 0x0c08800bab70: fa fa 00 00 00 00 00 00 fa fa 00 00 00 00 00 00 0x0c08800bab80: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fa 0x0c08800bab90: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd =>0x0c08800baba0: fa fa fd fd[fd]fd fd fa fa fa fd fd fd fd fd fa 0x0c08800babb0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa 0x0c08800babc0: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd 0x0c08800babd0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa 0x0c08800babe0: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd 0x0c08800babf0: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==24679==ABORTING </details>

KochetovNicolai · 2021-10-06T12:54:45Z

Ok, at least looks harmless

azat · 2021-10-06T21:24:39Z

Functional stateless tests (debug) — Timeout, fail: 0, passed: 0

2021.10.06 21:35:57.787624 [ 374 ] {} <Error> RaftInstance: got exception: bind: Address already in use

What is the value of net.ipv4.ip_local_port_range on CI?

…ng GROUP BY (leads to SIGSEGV)

…ing GROUP BY (leads to SIGSEGV)

…ng GROUP BY (leads to SIGSEGV)

Backport #29782 to 21.3: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

Backport #29782 to 21.7: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

Backport #29782 to 21.8: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

Backport #29782 to 21.9: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

Backport #29782 to 21.10: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

robot-clickhouse added the pr-bugfix Pull request with bugfix, not backported by default label Oct 5, 2021

alexey-milovidov requested a review from KochetovNicolai October 5, 2021 21:40

KochetovNicolai approved these changes Oct 6, 2021

View reviewed changes

Mark 02046_low_cardinality_parallel_group_by as long

a62728c

KochetovNicolai merged commit 25e2eba into ClickHouse:master Oct 7, 2021

robot-clickhouse pushed a commit that referenced this pull request Oct 7, 2021

Backport #29782 to 21.8: Fix concurrent access to LowCardinality duri…

f5568d0

…ng GROUP BY (leads to SIGSEGV)

robot-clickhouse mentioned this pull request Oct 7, 2021

Backport #29782 to 21.8: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29847

Merged

robot-clickhouse pushed a commit that referenced this pull request Oct 7, 2021

Backport #29782 to 21.3: Fix concurrent access to LowCardinality duri…

d4fa7bf

…ng GROUP BY (leads to SIGSEGV)

robot-clickhouse mentioned this pull request Oct 7, 2021

Backport #29782 to 21.3: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29848

Merged

robot-clickhouse pushed a commit that referenced this pull request Oct 7, 2021

Backport #29782 to 21.9: Fix concurrent access to LowCardinality duri…

4304938

…ng GROUP BY (leads to SIGSEGV)

robot-clickhouse mentioned this pull request Oct 7, 2021

Backport #29782 to 21.9: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29849

Merged

robot-clickhouse mentioned this pull request Oct 7, 2021

Backport #29782 to 21.10: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29850

Merged

robot-clickhouse pushed a commit that referenced this pull request Oct 7, 2021

Backport #29782 to 21.10: Fix concurrent access to LowCardinality dur…

6430842

…ing GROUP BY (leads to SIGSEGV)

robot-clickhouse pushed a commit that referenced this pull request Oct 7, 2021

Backport #29782 to 21.7: Fix concurrent access to LowCardinality duri…

2c9a417

…ng GROUP BY (leads to SIGSEGV)

robot-clickhouse mentioned this pull request Oct 7, 2021

Backport #29782 to 21.7: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV) #29851

Merged

azat deleted the lc-concurrent-GROUP-BY-fix branch October 7, 2021 21:13

KochetovNicolai added a commit that referenced this pull request Oct 12, 2021

Merge pull request #29848 from ClickHouse/backport/21.3/29782

59c47ac

Backport #29782 to 21.3: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

KochetovNicolai added a commit that referenced this pull request Oct 12, 2021

Merge pull request #29851 from ClickHouse/backport/21.7/29782

fec6241

Backport #29782 to 21.7: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

KochetovNicolai added a commit that referenced this pull request Oct 12, 2021

Merge pull request #29847 from ClickHouse/backport/21.8/29782

d47a4ee

Backport #29782 to 21.8: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

KochetovNicolai added a commit that referenced this pull request Oct 12, 2021

Merge pull request #29849 from ClickHouse/backport/21.9/29782

f5cd4ae

Backport #29782 to 21.9: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

KochetovNicolai added a commit that referenced this pull request Oct 12, 2021

Merge pull request #29850 from ClickHouse/backport/21.10/29782

64b5a7d

Backport #29782 to 21.10: Fix concurrent access to LowCardinality during GROUP BY (leads to SIGSEGV)

alexey-milovidov mentioned this pull request Oct 15, 2021

SIGSEGV in requests with LowCardinality(String) from datagrip #30183

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