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References: <20231204085756.3303900-1-alexious@zju.edu.cn>
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From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Mon, 4 Dec 2023 13:27:11 -0500
Message-ID: <CADnq5_M0UodAHEkZR+naBELpeJXDexa5WHgp5DEzpP5ympAmaA@mail.gmail.com>
Subject: Re: [PATCH] [v2] drm/radeon/dpm: fix a memleak in sumo_parse_power_table
To:     Zhipeng Lu <alexious@zju.edu.cn>
Cc:     "Pan, Xinhui" <Xinhui.Pan@amd.com>, linux-kernel@vger.kernel.org,
        amd-gfx@lists.freedesktop.org, Jerome Glisse <jglisse@redhat.com>,
        dri-devel@lists.freedesktop.org,
        Alex Deucher <alexander.deucher@amd.com>,
        =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>
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On Mon, Dec 4, 2023 at 5:39=E2=80=AFAM Zhipeng Lu <alexious@zju.edu.cn> wro=
te:
>
> The rdev->pm.dpm.ps allocated by kcalloc should be freed in every
> following error-handling path. However, in the error-handling of
> rdev->pm.power_state[i].clock_info the rdev->pm.dpm.ps is not freed,
> resulting in a memleak in this function.
>
> Fixes: 80ea2c129c76 ("drm/radeon/kms: add dpm support for sumo asics (v2)=
")
> Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>

Applied.  Thanks!

> ---
>
> Changelog:
>
> v2: Adding {} to make if statement correct.
> ---
>  drivers/gpu/drm/radeon/sumo_dpm.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/sumo_dpm.c b/drivers/gpu/drm/radeon/s=
umo_dpm.c
> index f74f381af05f..d49c145db437 100644
> --- a/drivers/gpu/drm/radeon/sumo_dpm.c
> +++ b/drivers/gpu/drm/radeon/sumo_dpm.c
> @@ -1493,8 +1493,10 @@ static int sumo_parse_power_table(struct radeon_de=
vice *rdev)
>                 non_clock_array_index =3D power_state->v2.nonClockInfoInd=
ex;
>                 non_clock_info =3D (struct _ATOM_PPLIB_NONCLOCK_INFO *)
>                         &non_clock_info_array->nonClockInfo[non_clock_arr=
ay_index];
> -               if (!rdev->pm.power_state[i].clock_info)
> +               if (!rdev->pm.power_state[i].clock_info) {
> +                       kfree(rdev->pm.dpm.ps);
>                         return -EINVAL;
> +               }
>                 ps =3D kzalloc(sizeof(struct sumo_ps), GFP_KERNEL);
>                 if (ps =3D=3D NULL) {
>                         kfree(rdev->pm.dpm.ps);
> --
> 2.34.1
>