linux-kernel - Re: [PATCH] fix a memory leak in amdgpu_ras_feature

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Message-ID: <CADnq5_Oaw6Cm+oUb_TpfPwTt_euA85CB1aY6dxcW=r2hjp_Aig@mail.gmail.com>
Date:   Thu, 14 Sep 2023 16:45:23 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     "Zhang, Hawking" <Hawking.Zhang@....com>
Cc:     Cong Liu <liucong2@...inos.cn>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        "Yang, Stanley" <Stanley.Yang@....com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fix a memory leak in amdgpu_ras_feature_enable

Applied.  Thanks!

On Thu, Sep 14, 2023 at 5:53 AM Zhang, Hawking <Hawking.Zhang@....com> wrote:
>
> [AMD Official Use Only - General]
>
> Reviewed-by: Hawking Zhang <Hawking.Zhang@....com>
>
> Regards,
> Hawking
> -----Original Message-----
> From: Cong Liu <liucong2@...inos.cn>
> Sent: Thursday, September 14, 2023 17:46
> To: Deucher, Alexander <Alexander.Deucher@....com>; Koenig, Christian <Christian.Koenig@....com>; Pan, Xinhui <Xinhui.Pan@....com>; David Airlie <airlied@...il.com>; Daniel Vetter <daniel@...ll.ch>; Yang, Stanley <Stanley.Yang@....com>; Zhang, Hawking <Hawking.Zhang@....com>
> Cc: Cong Liu <liucong2@...inos.cn>; amd-gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-kernel@...r.kernel.org
> Subject: [PATCH] fix a memory leak in amdgpu_ras_feature_enable
>
> This patch fixes a memory leak in the amdgpu_ras_feature_enable() function.
> The leak occurs when the function sends a command to the firmware to enable or disable a RAS feature for a GFX block. If the command fails, the kfree() function is not called to free the info memory.
>
> Fixes: bf7aa8bea9cb ("drm/amdgpu: Free ras cmd input buffer properly")
> Signed-off-by: Cong Liu <liucong2@...inos.cn>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index 8eb6f6943778..b4a8ea946410 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -802,6 +802,7 @@ int amdgpu_ras_feature_enable(struct amdgpu_device *adev,
>                                 enable ? "enable":"disable",
>                                 get_ras_block_str(head),
>                                 amdgpu_ras_is_poison_mode_supported(adev), ret);
> +                       kfree(info);
>                         return ret;
>                 }
>
> --
> 2.34.1
>