linux-kernel - Re: [PATCH] drm/amdgpu: Fix memory leak in amdgpu_fence

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Date:   Tue, 22 Oct 2019 06:54:13 +0000
From:   "Koenig, Christian" <Christian.Koenig@....com>
To:     Navid Emamdoost <navid.emamdoost@...il.com>
CC:     "emamd001@....edu" <emamd001@....edu>,
        "kjlu@....edu" <kjlu@....edu>,
        "smccaman@....edu" <smccaman@....edu>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Zhou, David(ChunMing)" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "Quan, Evan" <Evan.Quan@....com>,
        "Zhang, Hawking" <Hawking.Zhang@....com>,
        Sam Ravnborg <sam@...nborg.org>,
        "Xiao, Jack" <Jack.Xiao@....com>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu: Fix memory leak in amdgpu_fence_emit

Am 21.10.19 um 20:09 schrieb Navid Emamdoost:
> In the impelementation of amdgpu_fence_emit() if dma_fence_wait() fails
> and returns an errno, before returning the allocated memory for fence
> should be released.
>
> Fixes: 3d2aca8c8620 ("drm/amdgpu: fix old fence check in amdgpu_fence_emit")
> Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> index 23085b352cf2..2f59c9270a7e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
> @@ -166,8 +166,10 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **f,
>   		if (old) {
>   			r = dma_fence_wait(old, false);
>   			dma_fence_put(old);
> -			if (r)
> +			if (r) {
> +				dma_fence_put(fence);
>   				return r;
> +			}
>   		}
>   	}
>