netdev - Re: drivers： target： iscsi: cxgbit: is there exist a memleak in cxgbit_create

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Message-ID: <CALvgte-xH-O6GuhD94o6GR5ko2hSj0vWViR8XFAp3+fd=eJn_Q@mail.gmail.com>
Date:   Mon, 20 Apr 2020 06:23:03 +0000
From:   Zhiyun Qian <zhiyunq@...ucr.edu>
To:     易林 <yilin@....ac.cn>
Cc:     vishal@...lsio.com, "csong@...ucr.edu" <csong@...ucr.edu>,
        "yiqiuping@...il.com" <yiqiuping@...il.com>,
        jian liu <liujian6@....ac.cn>, netdev@...r.kernel.org
Subject: Re: drivers： target： iscsi: cxgbit: is there exist a memleak in cxgbit_create_server4?

-Zhiyun

On Mon, Apr 20, 2020 at 2:48 AM 易林 <yilin@....ac.cn> wrote:
>
> static int
> cxgbit_create_server4(struct cxgbit_device *cdev, unsigned int stid,
>                       struct cxgbit_np *cnp)
> {
>         struct sockaddr_in *sin = (struct sockaddr_in *)
>                                    &amp;cnp-&gt;com.local_addr;
>         int ret;
>
>         pr_debug("%s: dev = %s; stid = %u; sin_port = %u\n",
>                  __func__, cdev-&gt;lldi.ports[0]-&gt;name, stid, sin-&gt;sin_port);
>
>         cxgbit_get_cnp(cnp);
>         cxgbit_init_wr_wait(&amp;cnp-&gt;com.wr_wait);
>
>         ret = cxgb4_create_server(cdev-&gt;lldi.ports[0],
>                                   stid, sin-&gt;sin_addr.s_addr,
>                                   sin-&gt;sin_port, 0,
>                                   cdev-&gt;lldi.rxq_ids[0]);
>         if (!ret)
>                 ret = cxgbit_wait_for_reply(cdev,
>                                             &amp;cnp-&gt;com.wr_wait,
>                                             0, 10, __func__);
>         else if (ret &gt; 0)
>                 ret = net_xmit_errno(ret);
>         else
>                 cxgbit_put_cnp(cnp);
>
>         if (ret)
>                 pr_err("create server failed err %d stid %d laddr %pI4 lport %d\n",
>                        ret, stid, &amp;sin-&gt;sin_addr, ntohs(sin-&gt;sin_port));
>         return ret;
> }
> what if cxgb4_create_server return a &gt;0 value, the cnp reference wouldn't be released. Or, when cxgb4_create_server  return &gt;0 value, cnp has been released somewhere.

"&gt:0"? typo?