Azat Khuzhin f6cfcd4da9 Fix null dereference with join_use_nulls=1 ...

Found with MSan [1], the following query triggers null dereference:

```sql
SELECT
    Y.id - 1
FROM X
RIGHT JOIN Y ON (X.id + 1) = Y.id
SETTINGS join_use_nulls=1; -- { serverError 53 }
```

```
Received signal 11
(version 21.3.1.5916, build id: 2E9E84AA32AEAAC7C8B6EB45DA3EC0B4F15E9ED4) (from thread 100) (query_id: 9ab8cb0d-be8d-445e-8498-930a7268488b) Received signal Segmentation fault (11)
Address: 0x10 Access: read. Address not mapped to object.
Stack trace: 0x2d079d65 0x29bf1f30 0x12b12220 0x12b13098 0x12b17b08 0x12b20459 0x2ae37913 0x2ae352d9 0x2c746072 0x2c7585dd 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d 0x2c7483e3 0x2c74e63d
4. ./obj-x86_64-linux-gnu/../contrib/boost/boost/smart_ptr/intrusive_ptr.hpp:0: DB::ColumnConst::ColumnConst(COW<DB::IColumn>::immutable_ptr<DB::IColumn> const&, unsigned long) @ 0x2d079d65 in /workspace/clickhouse
5. ./obj-x86_64-linux-gnu/../src/Common/COW.h:0: DB::createBlockWithNestedColumns(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&) @ 0x29bf1f30 in /workspace/clickhouse
6. DB::FunctionOverloadResolverAdaptor::getReturnTypeDefaultImplementationForNulls(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&, std::__1::function<std::__1::shared_ptr<DB::IDataType const> (std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&)> const&) @ 0x12b12220 in /workspace/clickhouse
7. DB::FunctionOverloadResolverAdaptor::getReturnTypeWithoutLowCardinality(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&) const @ 0x12b13098 in /workspace/clickhouse
8. DB::FunctionOverloadResolverAdaptor::getReturnType(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&) const @ 0x12b17b08 in /workspace/clickhouse
9. DB::FunctionOverloadResolverAdaptor::build(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName> > const&) const @ 0x12b20459 in /workspace/clickhouse
```

  [1]: https://clickhouse-test-reports.s3.yandex.net/19451/64c0bf98290362fa216c05b070aa122a12af3c25/fuzzer_msan/report.html#fail1

2021-02-11 21:30:05 +03:00

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