[PATCH v3] driver: uio: fix possible memory leak in uio_open

[PATCH v3] driver: uio: fix possible memory leak in uio_open

[liujian]

Fixes: 57c5f4df0a5a ("uio: fix crash after the device is unregistered")
Signed-off-by: liujian <liujian56@huawei.com>
---
v1->v2:
rename the "err_infoopen" to "err_idev_info"
v2->3:
put the extra info after the "--"

 drivers/uio/uio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 5c10fc7..aab3520 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -496,18 +496,19 @@ static int uio_open(struct inode *inode, struct file *filep)
 	if (!idev->info) {
 		mutex_unlock(&idev->info_lock);
 		ret = -EINVAL;
-		goto err_alloc_listener;
+		goto err_idev_info;
 	}
 
 	if (idev->info && idev->info->open)
 		ret = idev->info->open(idev->info, inode);
 	mutex_unlock(&idev->info_lock);
 	if (ret)
-		goto err_infoopen;
+		goto err_idev_info;
 
 	return 0;
 
-err_infoopen:
+err_idev_info:
+	filep->private_data = NULL;
 	kfree(listener);
 
 err_alloc_listener:
-- 
2.7.4

Re: [PATCH v3] driver: uio: fix possible memory leak in uio_open

[Xiubo Li]

On 2019/1/3 22:28, liujian wrote:
> Fixes: 57c5f4df0a5a ("uio: fix crash after the device is unregistered")
> Signed-off-by: liujian <liujian56@huawei.com>
> ---
> v1->v2:
> rename the "err_infoopen" to "err_idev_info"
> v2->3:
> put the extra info after the "--"

Looks good to me.

Thanks.
BRs


>   drivers/uio/uio.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
> index 5c10fc7..aab3520 100644
> --- a/drivers/uio/uio.c
> +++ b/drivers/uio/uio.c
> @@ -496,18 +496,19 @@ static int uio_open(struct inode *inode, struct file *filep)
>   	if (!idev->info) {
>   		mutex_unlock(&idev->info_lock);
>   		ret = -EINVAL;
> -		goto err_alloc_listener;
> +		goto err_idev_info;
>   	}
>   
>   	if (idev->info && idev->info->open)
>   		ret = idev->info->open(idev->info, inode);
>   	mutex_unlock(&idev->info_lock);
>   	if (ret)
> -		goto err_infoopen;
> +		goto err_idev_info;
>   
>   	return 0;
>   
> -err_infoopen:
> +err_idev_info:
> +	filep->private_data = NULL;
>   	kfree(listener);
>   
>   err_alloc_listener:

Re: [PATCH v3] driver: uio: fix possible memory leak in uio_open

[Greg KH]

On Thu, Jan 03, 2019 at 10:28:22PM +0800, liujian wrote:
> Fixes: 57c5f4df0a5a ("uio: fix crash after the device is unregistered")
> Signed-off-by: liujian <liujian56@huawei.com>


I can not take patches without any changelog text at all :(

Also, is "liujian" your full name?  We need a real and full name for a
signed-off-by line.

thanks,

greg k-h

RE: [PATCH v3] driver: uio: fix possible memory leak in uio_open

[liujian (CE)]

> -----Original Message-----
> From: Greg KH [mailto:gregkh@linuxfoundation.org]
> Sent: Tuesday, January 08, 2019 12:14 AM
> To: liujian (CE) <liujian56@huawei.com>
> Cc: xiubli@redhat.com; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v3] driver: uio: fix possible memory leak in uio_open
> 
> On Thu, Jan 03, 2019 at 10:28:22PM +0800, liujian wrote:
> > Fixes: 57c5f4df0a5a ("uio: fix crash after the device is
> > unregistered")
> > Signed-off-by: liujian <liujian56@huawei.com>
> 
> 
> I can not take patches without any changelog text at all :(
I am sorry, I will resend the patch~
> 
> Also, is "liujian" your full name?  We need a real and full name for a
> signed-off-by line.

Yes, but as someone do, I may need change 'liujian' to 'Liu Jian'
Thanks

> thanks,
> 
> greg k-h