linux-kernel - Re: [PATCH v2] scsi: Use vmemdup

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Date:   Tue, 18 Sep 2018 23:00:37 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     <martin.petersen@...cle.com>, <Don.Brace@...rochip.com>,
        <don.brace@...rosemi.com>, <jejb@...ux.vnet.ibm.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] scsi: Use vmemdup_user to replace the open code

Hi,  Greg

Can you pick up the patch?

Thanks,
zhong jiang

On 2018/8/23 19:38, zhong jiang wrote:
> On 2018/8/13 22:20, Don.Brace@...rochip.com wrote:
>>> -----Original Message-----
>>> From: zhong jiang [mailto:zhongjiang@...wei.com]
>>> Sent: Monday, August 13, 2018 7:43 AM
>>> To: don.brace@...rosemi.com; jejb@...ux.vnet.ibm.com;
>>> martin.petersen@...cle.com
>>> Cc: linux-kernel@...r.kernel.org
>>> Subject: [PATCH v2] scsi: Use vmemdup_user to replace the open code
>>>
>>> EXTERNAL EMAIL
>>>
>>>
>>> EXTERNAL EMAIL
>>>
>>>
>>> vmemdup_user is better than duplicating its implementation, So just
>>> replace the open code.
>>>
>>> The issue is detected with the help of Coccinelle.
>>>
>>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
>> Tested-by: Don Brace <don.brace@...rosemi.com>
>> Acked-by: Don Brace <don.brace@...rosemi.com>
>  Thanks Don for your test and ack.
>  
>  Martin ,  Can you pick up the patch, Thanks
>
>  Best wishes,
>  zhong jiang
>>> ---
>>>  drivers/scsi/hpsa.c | 12 ++++--------
>>>  1 file changed, 4 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
>>> index 58bb70b..666ba09e5 100644
>>> --- a/drivers/scsi/hpsa.c
>>> +++ b/drivers/scsi/hpsa.c
>>> @@ -6381,13 +6381,9 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info
>>> *h, void __user *argp)
>>>                 return -EINVAL;
>>>         if (!capable(CAP_SYS_RAWIO))
>>>                 return -EPERM;
>>> -       ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
>>> -       if (!ioc) {
>>> -               status = -ENOMEM;
>>> -               goto cleanup1;
>>> -       }
>>> -       if (copy_from_user(ioc, argp, sizeof(*ioc))) {
>>> -               status = -EFAULT;
>>> +       ioc = vmemdup_user(argp, sizeof(*ioc));
>>> +       if (IS_ERR(ioc)) {
>>> +               status = PTR_ERR(ioc);
>>>                 goto cleanup1;
>>>         }
>>>         if ((ioc->buf_size < 1) &&
>>> @@ -6505,7 +6501,7 @@ static int hpsa_big_passthru_ioctl(struct ctlr_info *h,
>>> void __user *argp)
>>>                 kfree(buff);
>>>         }
>>>         kfree(buff_size);
>>> -       kfree(ioc);
>>> +       kvfree(ioc);
>>>         return status;
>>>  }
>>>
>>> --
>>> 1.7.12.4
>>
>
>
> .
>