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Subject: Re: [PATCH v2] nbd: Fix memory leak in nbd_add_socket
To:     Zheng Bin <zhengbin13@huawei.com>, linux-block@vger.kernel.org
Cc:     nbd@other.debian.org, Aditya Pakki <pakki001@umn.edu>,
        Navid Emamdoost <emamd001@umn.edu>, Kangjie Lu <kjlu@umn.edu>,
        Stephen McCamant <mccamant@cs.umn.edu>,
        Qiushi Wu <wu000273@umn.edu>, kernel-janitors@vger.kernel.org,
        linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
        Josef Bacik <josef@toxicpanda.com>,
        Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>,
        Yi Zhang <yi.zhang@huawei.com>
References: <b55f8af2-b20c-214f-90f0-9b6efcb7273c@web.de>
 <db17d022-a53a-3781-63d4-c38d5cf5b1e4@huawei.com>
From:   Markus Elfring <Markus.Elfring@web.de>
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Message-ID: <1a58ab81-3810-0763-7394-10b51add23ee@web.de>
Date:   Mon, 22 Jun 2020 09:52:22 +0200
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

>> Can an other wording variant be nicer?
>
> em, how about this?
>
>
> When adding first socket to nbd,

How do you think about to replace abbreviations by terms?


> if nsock's allocation fails,

=E2=80=A6 failed,


> config->socks is malloced

The data structure member =E2=80=9Cconfig->socks=E2=80=9D was reallocated.


> but num_connections does not update,

But the data structure member =E2=80=9Cconfig->num_connections=E2=80=9D wa=
s not updated.


> memory leak will occur(Function
> nbd_config_put will only free config->socks when num_connections is not =
0).

A memory leak will occur then because the function =E2=80=9Cnbd_config_put=
=E2=80=9D
will free =E2=80=9Cconfig->socks=E2=80=9D only when =E2=80=9Cnum_connectio=
ns=E2=80=9D is not zero.

Would you like to add an imperative wording to the commit message?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do=
cumentation/process/submitting-patches.rst?id=3D625d3449788f85569096780592=
549d0340e9c0c7#n151

Regards,
Markus