linux-kernel - Re: [Linux-cifsd-devel] [PATCH] cifsd: use kfree to free memory allocated by kzalloc

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Message-ID: <CAKYAXd-ScM9i9Ln_FL8pWyEnPO_0n8t1BLH8MJ=b4NkqEbhZ=Q@mail.gmail.com>
Date:   Thu, 1 Apr 2021 21:59:14 +0900
From:   Namjae Jeon <linkinjeon@...nel.org>
To:     Ralph Boehme <slow@...ba.org>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        COMMON INTERNET FILE SYSTEM SERVER 
        <linux-cifs@...r.kernel.org>,
        COMMON INTERNET FILE SYSTEM SERVER 
        <linux-cifsd-devel@...ts.sourceforge.net>,
        kernel-janitors@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>,
        Steve French <sfrench@...ba.org>, colin.king@...onical.com,
        Muhammad Usama Anjum <musamaanjum@...il.com>
Subject: Re: [Linux-cifsd-devel] [PATCH] cifsd: use kfree to free memory
 allocated by kzalloc

2021-04-01 21:50 GMT+09:00, Ralph Boehme <slow@...ba.org>:
> Am 4/1/21 um 2:43 PM schrieb Namjae Jeon:
>> 2021-04-01 20:50 GMT+09:00, Dan Carpenter <dan.carpenter@...cle.com>:
>>> On Thu, Apr 01, 2021 at 04:39:33PM +0500, Muhammad Usama Anjum wrote:
>>>> kfree should be used to free memory allocated by kzalloc to avoid
>>>> any overhead and for maintaining consistency.
>>>>
>>>> Fixes: 5dfeb6d945 ("cifsd: use kmalloc() for small allocations")
>>>> Signed-off-by: Muhammad Usama Anjum <musamaanjum@...il.com>
>>>> ---
>>>> This one place was left in earlier patch. I've already received
>>>> responsse on that patch. I'm sending a separate patch.
>>>>
>>>>   fs/cifsd/transport_tcp.c | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/fs/cifsd/transport_tcp.c b/fs/cifsd/transport_tcp.c
>>>> index 67163efcf472..040881893417 100644
>>>> --- a/fs/cifsd/transport_tcp.c
>>>> +++ b/fs/cifsd/transport_tcp.c
>>>> @@ -551,7 +551,7 @@ void ksmbd_tcp_destroy(void)
>>>>   	list_for_each_entry_safe(iface, tmp, &iface_list, entry) {
>>>>   		list_del(&iface->entry);
>>>>   		kfree(iface->name);
>>>> -		ksmbd_free(iface);
>>>> +		kfree(iface);
>>>
>>> We should just delete the ksmbd_free() function completely.
>> Yes, I have added your review comment about this to my todo-list.
>> I will do that.
>>>
>>> I think that cifsd is being re-written though so it might not be worth
>>> it.
>> Right.
>
> fwiw, while at it what about renaming everything that still references
> "cifs" to "smb" ? This is not the 90's... :)
It is also used with the name "ksmbd". So function and variable prefix
are used with ksmbd.

Thanks!
>
> Cheers!
> -slow
>
>