linux-kernel - Re: [PATCH] ksmbd: initialize ar to NULL

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Date:   Wed, 29 Nov 2023 13:46:35 +0800
From:   Zongmin Zhou <zhouzongmin@...inos.cn>
To:     Namjae Jeon <linkinjeon@...nel.org>
Cc:     sfrench@...ba.org, senozhatsky@...omium.org, tom@...pey.com,
        linux-cifs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ksmbd: initialize ar to NULL

Okay,got it.

Thanks

On 2023/11/29 12:47, Namjae Jeon wrote:
> 2023-11-29 12:31 GMT+09:00, Zongmin Zhou <zhouzongmin@...inos.cn>:
>> Friendly ping. I think this patch was forgotten.
> Sorry for not sharing it, I have merged it into another patch from
> you("ksmbd: prevent memory leak on error return").
>
> Thanks.
>> Best regards!
>>
>> On 2023/11/20 10:39, Zongmin Zhou wrote:
>>> Initialize ar to NULL to avoid the case of aux_size will be false,
>>> and kfree(ar) without ar been initialized will be unsafe.
>>> But kfree(NULL) is safe.
>>>
>>> Signed-off-by: Zongmin Zhou<zhouzongmin@...inos.cn>
>>> Acked-by: Namjae Jeon <linkinjeon@...nel.org>
>>> ---
>>>    fs/smb/server/ksmbd_work.c | 2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/fs/smb/server/ksmbd_work.c b/fs/smb/server/ksmbd_work.c
>>> index 44bce4c56daf..2510b9f3c8c1 100644
>>> --- a/fs/smb/server/ksmbd_work.c
>>> +++ b/fs/smb/server/ksmbd_work.c
>>> @@ -106,7 +106,7 @@ static inline void __ksmbd_iov_pin(struct ksmbd_work
>>> *work, void *ib,
>>>    static int __ksmbd_iov_pin_rsp(struct ksmbd_work *work, void *ib, int
>>> len,
>>>    			       void *aux_buf, unsigned int aux_size)
>>>    {
>>> -	struct aux_read *ar;
>>> +	struct aux_read *ar = NULL;
>>>    	int need_iov_cnt = 1;
>>>
>>>    	if (aux_size) {
>>