linux-kernel - Re: [PATCH] drm/i915/gvt: fix memory leak in intel_vgpu

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Message-ID: <20180803012715.GB3035@zhen-hp.sh.intel.com>
Date:   Fri, 3 Aug 2018 09:27:15 +0800
From:   Zhenyu Wang <zhenyuw@...ux.intel.com>
To:     Yi Wang <wang.yi59@....com.cn>
Cc:     zhenyuw@...ux.intel.com, zhi.a.wang@...el.com,
        jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, airlied@...ux.ie,
        intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, jiang.biao2@....com.cn,
        zhong.weidong@....com.cn
Subject: Re: [PATCH] drm/i915/gvt: fix memory leak in intel_vgpu_ioctl()

On 2018.08.03 08:41:19 +0800, Yi Wang wrote:
> The 'sparse' variable may leak when return in function
> intel_vgpu_ioctl(), and this patch fixes this.
> 
> Signed-off-by: Yi Wang <wang.yi59@....com.cn>
> Reviewed-by: Jiang Biao <jiang.biao2@....com.cn>
> ---

Looks fine to me, will queue this up.

Thanks for the patch!

>  drivers/gpu/drm/i915/gvt/kvmgt.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index df4e4a0..6a6f199 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -1200,6 +1200,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
>  					return ret;
>  				break;
>  			default:
> +				kfree(sparse);
>  				return -EINVAL;
>  			}
>  		}
> @@ -1215,6 +1216,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
>  						  sizeof(info), caps.buf,
>  						  caps.size)) {
>  					kfree(caps.buf);
> +					kfree(sparse);
>  					return -EFAULT;
>  				}
>  				info.cap_offset = sizeof(info);
> @@ -1223,6 +1225,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd,
>  			kfree(caps.buf);
>  		}
>  
> +		kfree(sparse);
>  		return copy_to_user((void __user *)arg, &info, minsz) ?
>  			-EFAULT : 0;
>  	} else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
> -- 
> 1.8.3.1
> 

-- 
Open Source Technology Center, Intel ltd.

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