fix segfault and memory leaks in CS

[zverevgeny]

intergrate
#7239
#7280
from main

[github-actions]

⚪ 2024-07-31 09:04:53 UTC Pre-commit check for 13f47f6 has started.
⚪ 2024-07-31 09:07:29 UTC Build linux-x86_64-release-asan is running...
🟢 2024-07-31 09:36:09 UTC Build successful.
⚪ 2024-07-31 09:36:26 UTC Tests are running...
🔴 2024-07-31 12:11:08 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
10031	9441	0	82	335	173

🟢 2024-07-31 12:13:23 UTC ydbd size 5.2 GiB changed* by +11.9 KiB, which is < 100.0 KiB vs stable-24-3: OK

ydbd size dash	stable-24-3: 725b0df	merge: 13f47f6	diff	diff %
ydbd size	5 613 453 456 Bytes	5 613 465 680 Bytes	+11.9 KiB	+0.000%
ydbd stripped size	1 210 296 840 Bytes	1 210 299 208 Bytes	+2.3 KiB	+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]

⚪ 2024-07-31 09:06:49 UTC Pre-commit check for 13f47f6 has started.
⚪ 2024-07-31 09:09:25 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-07-31 09:54:26 UTC Build successful.
⚪ 2024-07-31 09:54:46 UTC Tests are running...
🔴 2024-07-31 11:36:54 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38528	33294	0	1	5219	14

🟢 2024-07-31 11:39:23 UTC ydbd size 8.1 GiB changed* by -78.6 KiB, which is <= 0 Bytes vs stable-24-3: OK

ydbd size dash	stable-24-3: 725b0df	merge: 13f47f6	diff	diff %
ydbd size	8 724 358 984 Bytes	8 724 278 536 Bytes	-78.6 KiB	-0.001%
ydbd stripped size	476 945 224 Bytes	476 945 928 Bytes	+704 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]

⚪ 2024-07-31 09:07:26 UTC Pre-commit check for 13f47f6 has started.
⚪ 2024-07-31 09:10:06 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-07-31 09:23:17 UTC Build successful.