[Backport stable-25-3-1] PR #30257: heap-use-after-free in a PQ tablet

[ydbot]

Changelog entry

heap-use-after-free in a PQ tablet: Issue #30258

The BeginDeletePartitions method uses a value that can previously be deleted in TryDeleteWriteId.

Changelog category

• Bugfix

Description for reviewers

Original PR(s)

• PR heap-use-after-free in a PQ tablet #30257

Metadata

• Original PR author(s): @Alek5andr-Kotov
• Cherry-picked by: @Alek5andr-Kotov
• Related issues: heap-use-after-free in a PQ tablet #30258

Git Cherry-Pick Log

=== Cherry-picking 25029c1 ===
Auto-merging ydb/core/persqueue/pqtablet/pq_impl.cpp
[cherry-pick-stable-25-3-1-251206-135057 9094b636d50] heap-use-after-free in a PQ tablet (#30257)
 Author: Alek5andr-Kotov <akotov@ydb.tech>
 Date: Sat Dec 6 14:23:11 2025 +0300
 1 file changed, 2 insertions(+), 1 deletion(-)

---

PR was created by cherry-pick workflow run

[github-actions]

🟢 2025-12-06 13:54:18 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-12-06 13:55:04 UTC Pre-commit check linux-x86_64-relwithdebinfo for 5fe4069 has started.
⚪ 2025-12-06 13:55:20 UTC Artifacts will be uploaded here
⚪ 2025-12-06 13:58:51 UTC ya make is running...
🟡 2025-12-06 15:26:18 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
30742	29420	0	4	1301	17

⚪ 2025-12-06 15:28:39 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-12-06 15:44:57 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
578 (only retried tests)	564	0	1	1	12

⚪ 2025-12-06 15:45:07 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-12-06 15:59:11 UTC Tests successful.

Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
532 (only retried tests)	520	0	0	0	12

🟢 2025-12-06 15:59:19 UTC Build successful.
🟢 2025-12-06 15:59:39 UTC ydbd size 2.3 GiB changed* by -64 Bytes, which is <= 0 Bytes vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: b827c92	merge: 5fe4069	diff	diff %
ydbd size	2 437 103 384 Bytes	2 437 103 320 Bytes	-64 Bytes	-0.000%
ydbd stripped size	521 877 928 Bytes	521 877 864 Bytes	-64 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-12-06 13:56:23 UTC Pre-commit check linux-x86_64-release-asan for 5fe4069 has started.
⚪ 2025-12-06 13:56:38 UTC Artifacts will be uploaded here
⚪ 2025-12-06 14:00:13 UTC ya make is running...
🟡 2025-12-06 16:09:48 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15421	14929	0	180	295	17

🟢 2025-12-06 16:10:59 UTC Build successful.
🟢 2025-12-06 16:11:30 UTC ydbd size 3.8 GiB changed* by -304 Bytes, which is <= 0 Bytes vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: b827c92	merge: 5fe4069	diff	diff %
ydbd size	4 055 129 096 Bytes	4 055 128 792 Bytes	-304 Bytes	-0.000%
ydbd stripped size	1 511 174 848 Bytes	1 511 174 656 Bytes	-192 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}