Hotfix/sangshuduo/td 3197 fix taosdemo coverity scan (#6907)

* [TD-3197] <fix>: fix taosdemo coverity scan issues.

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

fix subscribeTest pids uninitialized.

* [TD-3197] <fix>: fix taosdemo coverity scan issues.

* [TD-3197] <fix>: fix coverity scan issues.

check super tbl info pointer.

* [TD-3197] <fix>: fix coverity scan issues.

move sub tbl query thread join into loop

* [TD-3197] <fix>: fix coverity scan issues.

remove unused variable

* [TD-3197] <fix>: fix coverity scan issues.

use more secure random library

* [TD-3197] <fix>: fix coverity scan issues.

use strncpy for more safe

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

replace arc4random with rand().

* [TD-3197] <fix>: fix coverity scan issues.

check stb info pointer for start time

* [TD-3197] <fix>: fix coverity scan issues.

fix strcpy vulnerability

* [TD-3197] <fix>: fix taosdemo coverity scan issue.

modify taosdemoTest2. try to check database continously.

* [TD-3197] <fix>: taosdemo coverity scan issues.

* [TD-3197] <fix>: fix memory leak when parsing arguments.

* [TD-3197] <fix>: fix cmake strip arguments.

* [TD-3197] <fix>: taosdemo coverity scan.

fix cmake string manipulation.

* [TD-3197]<fix>: taosdemo coverity scan issue.

configDir buffer overwrite.

* [TD-3197]<fix>: coverity scan issue.

taosdump argument validation.

* [TD-3197]<fix>: taosdemo and taosdump coverity scan issues.

* [TD-3197]<fix>: taosdemo coverity scan.

append result buf to file. for develop branch.

* exit if read sample file failed.

* fix converity scan issue.

* fix coverity scan issue.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -5002,6 +5002,7 @@ static int64_t generateData(char *recBuf, char **data_type,
             if (s == NULL) {
                 errorPrint("%s() LN%d, memory allocation %d bytes failed\n",
                         __func__, __LINE__, lenOfBinary + 1);
+                exit(-1);
             }
             rand_string(s, lenOfBinary);
             pstr += sprintf(pstr, ",\"%s\"", s);
@@ -5011,6 +5012,7 @@ static int64_t generateData(char *recBuf, char **data_type,
             if (s == NULL) {
                 errorPrint("%s() LN%d, memory allocation %d bytes failed\n",
                         __func__, __LINE__, lenOfBinary + 1);
+                exit(-1);
             }
             rand_string(s, lenOfBinary);
             pstr += sprintf(pstr, ",\"%s\"", s);
@@ -6747,7 +6749,9 @@ static void startMultiThreadInsertData(int threads, char* db_name,
                 char buffer[3000];
                 char *pstr = buffer;
 
-                if (AUTO_CREATE_SUBTBL == superTblInfo->autoCreateTable) {
+                if ((superTblInfo)
+                        && (AUTO_CREATE_SUBTBL
+                            == superTblInfo->autoCreateTable)) {
                     pstr += sprintf(pstr, "INSERT INTO ? USING %s TAGS(?",
                             superTblInfo->sTblName);
                     for (int tag = 0; tag < (superTblInfo->tagCount - 1); tag ++ ) {