linux-kernel - Re: [PATCH] [v2] drm/radeon/trinity_dpm: fix a memleak in trinity_parse_power

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Message-ID: <CADnq5_PZ4pzhSXCQjO7bs3WPHSbkOe57GVN+wxzza5NVzMWb6Q@mail.gmail.com>
Date:   Mon, 4 Dec 2023 13:29:38 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Zhipeng Lu <alexious@....edu.cn>
Cc:     "Pan, Xinhui" <Xinhui.Pan@....com>, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH] [v2] drm/radeon/trinity_dpm: fix a memleak in trinity_parse_power_table

Applied.  Thanks!

On Mon, Dec 4, 2023 at 5:39 AM Zhipeng Lu <alexious@....edu.cn> wrote:
>
> 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: d70229f70447 ("drm/radeon/kms: add dpm support for trinity asics")
> Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
> ---
>
> Changelog:
>
> v2: Adding {} to correct the if statement.
> ---
>  drivers/gpu/drm/radeon/trinity_dpm.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/trinity_dpm.c b/drivers/gpu/drm/radeon/trinity_dpm.c
> index 08ea1c864cb2..ef1cc7bad20a 100644
> --- a/drivers/gpu/drm/radeon/trinity_dpm.c
> +++ b/drivers/gpu/drm/radeon/trinity_dpm.c
> @@ -1726,8 +1726,10 @@ static int trinity_parse_power_table(struct radeon_device *rdev)
>                 non_clock_array_index = power_state->v2.nonClockInfoIndex;
>                 non_clock_info = (struct _ATOM_PPLIB_NONCLOCK_INFO *)
>                         &non_clock_info_array->nonClockInfo[non_clock_array_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 = kzalloc(sizeof(struct sumo_ps), GFP_KERNEL);
>                 if (ps == NULL) {
>                         kfree(rdev->pm.dpm.ps);
> --
> 2.34.1
>