shell 小白请教一个脚本问题

功能是公司一些服务器密码就那么几个，但是每次都要尝试几次很烦，所以通过脚本去尝试密码并记录。
逻辑是每次从 hostip.txt 中读取一个 ip ，然后扔到上面的循环里去试密码并记录
问题是每次读取完第一个 IP 并试完密码，循序就结束了，下面也提示在 read rows 。百思不得其解，求解答

## 密码列表，空格分隔
pwd_lists="passwd1 passwd2 passwd3 passwd4 passwd5"
## 记录找到的密码
psss_history_file="pwd_history.txt"

funTstPass(){
    for pwd_list in ${pwd_lists}
    do
        sshpass -p ${pwd_list} ssh -o StrictHostKeyChecking=no centos@${test_ip} "exit" || sshpass -p ${pwd_list} ssh -o StrictHostKeyChecking=no root@${test_ip} "exit"
        if [ $? -eq 0 ];then
            echo -e "\n[ Success ] IP=\"$test_ip\"  password=\"${pwd_list}\" "
            echo "$test_ip   ${pwd_list}" >> ${psss_history_file}
            break
        else
            echo "[ Failure ] password=\"${pwd_list}\""
        fi
    done
}
cat hostip.txt | while read rows
do
  test_ip=$rows
  funTstPass
done:

+ pwd_lists="passwd1 passwd2 passwd3 passwd4 passwd5"
+ psss_history_file=pwd_history.txt
+ cat hostip.txt
+ read rows
+ test_ip=10.0.0.50
+ funTstPass
+ for pwd_list in ${pwd_lists}
+ sshpass -p 'passwd1' ssh -o StrictHostKeyChecking=no centos@10.0.0.50 exit
Permission denied, please try again.
+ sshpass -p 'passwd1' ssh -o StrictHostKeyChecking=no root@10.0.0.50 exit
+ '[' 0 -eq 0 ']'
+ echo -e '\n[ Success ] IP="10.0.0.50"  password="passwd1" '

[ Success ] IP="10.0.0.50"  password="passwd1" 
+ echo '10.0.0.50   passwd1'
+ break
+ read rows