Virtualization - Apr 2021 - [PATCH][next] vdpa/mlx5: Fix resource leak of mgtdev due to incorrect kfree

From: Colin Ian King <colin.king at canonical.com>

Static analysis is reporting a memory leak on mgtdev, it appears
that the wrong object is being kfree'd. Fix this by kfree'ing
mgtdev rather than mdev.

Addresses-Coverity: ("Resource leak")
Fixes: c8a2d4c73e70 ("vdpa/mlx5: Enable user to add/delete vdpa
device")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 10c5fef3c020..25533db01f5f 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -2089,7 +2089,7 @@ static int mlx5v_probe(struct auxiliary_device *adev,
 	return 0;
 
 reg_err:
-	kfree(mdev);
+	kfree(mgtdev);
 	return err;
 }
 
-- 
2.30.2

? 2021/4/13 ??12:28, Colin King ??:
> From: Colin Ian King <colin.king at canonical.com>
>
> Static analysis is reporting a memory leak on mgtdev, it appears
> that the wrong object is being kfree'd. Fix this by kfree'ing
> mgtdev rather than mdev.
>
> Addresses-Coverity: ("Resource leak")
> Fixes: c8a2d4c73e70 ("vdpa/mlx5: Enable user to add/delete vdpa
device")
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>   drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index 10c5fef3c020..25533db01f5f 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -2089,7 +2089,7 @@ static int mlx5v_probe(struct auxiliary_device *adev,
>   	return 0;
>   
>   reg_err:
> -	kfree(mdev);
> +	kfree(mgtdev);
>   	return err;
>   }
>   

Acked-by: Jason Wang <jasowang at redhat.com>

On Mon, Apr 12, 2021 at 05:28:04PM +0100, Colin King
wrote:
>From: Colin Ian King <colin.king at canonical.com>
>
>Static analysis is reporting a memory leak on mgtdev, it appears
>that the wrong object is being kfree'd. Fix this by kfree'ing
>mgtdev rather than mdev.
>
>Addresses-Coverity: ("Resource leak")
>Fixes: c8a2d4c73e70 ("vdpa/mlx5: Enable user to add/delete vdpa
device")
>Signed-off-by: Colin Ian King <colin.king at canonical.com>
>---
> drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>index 10c5fef3c020..25533db01f5f 100644
>--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
>+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>@@ -2089,7 +2089,7 @@ static int mlx5v_probe(struct auxiliary_device *adev,
> 	return 0;
>
> reg_err:
>-	kfree(mdev);
>+	kfree(mgtdev);
> 	return err;
> }
>
>-- 
>2.30.2
>
Reviewed-by: Stefano Garzarella <sgarzare at redhat.com>