**Describe the bug**
https://clickhouse-test-reports.s3.yandex.net/19702/c74631c650b42e4d107254a03bd82c2c2913039b/fuzzer_msan/server.log

Most likely introduced here: #11006
{
            res->chars.insert(data_pos, data_pos + chars_per_simd_elements);
            data_pos += chars_per_simd_elements;
        }
        else
        {
            size_t res_chars_size = res->chars.size();
            for (size_t i = 0; i < SIMD_BYTES; ++i)
            {
                if (filt_pos[i])
                {
                    res->chars.resize(res_chars_size + n);
                    memcpySmallAllowReadWriteOverflow15(&res->chars[res_chars_size], data_pos, n);
                    res_chars_size += n;
                }
                data_pos += n;
            }
        }
        filt_pos += SIMD_BYTES;
    }
#endif
    size_t res_chars_size = res->chars.size();
    while (filt_pos < filt_end)
    {
        if (*filt_pos)
        {
            res->chars.resize(res_chars_size + n);
            memcpySmallAllowReadWriteOverflow15(&res->chars[res_chars_size], data_pos, n);
            res_chars_size += n;
        }