linux-kernel - Re: [PATCH] drm/amd/powerplay: Fix an off by one in navi10_get_smu_msg_index()

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Date:   Mon, 26 Aug 2019 11:16:55 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Kevin Wang <kevin1.wang@....com>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Huang Rui <ray.huang@....com>, Daniel Vetter <daniel@...ll.ch>,
        Evan Quan <evan.quan@....com>,
        Kenneth Feng <kenneth.feng@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH] drm/amd/powerplay: Fix an off by one in navi10_get_smu_msg_index()

On Mon, Aug 26, 2019 at 9:20 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> The navi10_message_map[] array has SMU_MSG_MAX_COUNT elements so the ">"
> has to be changed to ">=" to prevent reading one element beyond the end
> of the array.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied.  thanks!

Alex

> ---
>  drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> index d7e25f5113f1..fbecd25f150f 100644
> --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> @@ -213,7 +213,7 @@ static int navi10_get_smu_msg_index(struct smu_context *smc, uint32_t index)
>  {
>         struct smu_11_0_cmn2aisc_mapping mapping;
>
> -       if (index > SMU_MSG_MAX_COUNT)
> +       if (index >= SMU_MSG_MAX_COUNT)
>                 return -EINVAL;
>
>         mapping = navi10_message_map[index];
> --
> 2.20.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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