[PATCH 2/2] drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference
neil.armstrong at linaro.org
neil.armstrong at linaro.org
Thu Oct 31 09:37:23 UTC 2024
On 25/10/2024 09:34, Zhang Zekun wrote:
> drm_mode_duplicate() could return NULL due to lack of memory,
> which will then call NULL pointer dereference. Add a check to
> prevent it.
>
> Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")
> Signed-off-by: Zhang Zekun <zhangzekun11 at huawei.com>
> ---
> drivers/gpu/drm/panel/panel-himax-hx83102.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-himax-hx83102.c b/drivers/gpu/drm/panel/panel-himax-hx83102.c
> index 8b48bba18131..3644a7544b93 100644
> --- a/drivers/gpu/drm/panel/panel-himax-hx83102.c
> +++ b/drivers/gpu/drm/panel/panel-himax-hx83102.c
> @@ -565,6 +565,8 @@ static int hx83102_get_modes(struct drm_panel *panel,
> struct drm_display_mode *mode;
>
> mode = drm_mode_duplicate(connector->dev, m);
> + if (!mode)
> + return -ENOMEM;
>
> mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> drm_mode_set_name(mode);
Reviewed-by: Neil Armstrong <neil.armstrong at linaro.org>
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