Cherry pick #85440 to 25.7: Fix possible UB in case of MEMORY_LIMIT_EXCEEDED during String deserialization#85584
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robot-ch-test-poll3 merged 5 commits intobackport/25.7/85440from Aug 15, 2025
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…alization Previously it was possible to leave `offsets` and `data` out of sync if `data.resize_exact` fails with `MEMORY_LIMIT_EXCEEDED`, which eventually will lead to various UBs (i.e. `SIZES_OF_COLUMNS_DOESNT_MATCH` and `LOGICAL_ERROR`)
W/o the fix it always fails, i.e.:
$ src/unit_tests_dbms --gtest_filter=StringSerialization.*
Note: Google Test filter = StringSerialization.*
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from StringSerialization
[ RUN ] StringSerialization.IncorrectStateAfterMemoryLimitExceeded
/src/ch/clickhouse/src/DataTypes/Serializations/tests/gtest_string_serialization.cpp:79: Failure
Expected equality of these values:
result.getDataAt(result.size() - 1)
Which is: ar\0foo
"foobar"
Which is: 0x555557ce25a3
[ FAILED ] StringSerialization.IncorrectStateAfterMemoryLimitExceeded (28 ms)
[----------] 1 test from StringSerialization (28 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (30 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] StringSerialization.IncorrectStateAfterMemoryLimitExceeded
1 FAILED TEST
Fix possible UB in case of MEMORY_LIMIT_EXCEEDED during String deserialization
robot-ch-test-poll4
added
pr-cherrypick
Contributor
|
Dear @azat, @alexey-milovidov, the PR is not updated for 1d1h0m49s. Please, either resolve the conflicts, or close it to finish the backport process of #85440 |
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Original pull-request #85440
Do not merge this PR manually
This pull-request is a first step of an automated backporting.
It contains changes similar to calling
git cherry-picklocally.If you intend to continue backporting the changes, then resolve all conflicts if any.
Otherwise, if you do not want to backport them, then just close this pull-request.
The check results does not matter at this step - you can safely ignore them.
Troubleshooting
If the conflicts were resolved in a wrong way
If this cherry-pick PR is completely screwed by a wrong conflicts resolution, and you want to recreate it:
pr-cherrypicklabel from the PRYou also need to check the Original pull-request for
pr-backports-createdlabel, and delete if it's presented thereThe PR source
The PR is created in the CI job