[PATCH 1/1] drm/mediatek: Fix access violation in mtk_drm_crtc_dma_dev_get

[AngeloGioacchino Del Regno]

Il 10/11/23 02:29, Stuart Lee ha scritto:
> Add error handling to check NULL input in
> mtk_drm_crtc_dma_dev_get function.
> 
> While display path is not configured correctly, none of crtc is
> established. So the caller of mtk_drm_crtc_dma_dev_get may pass
> input parameter *crtc as NULL, Which may cause coredump when
> we try to get the container of NULL pointer.
> 
> Fixes: cb1d6bcca542 ("drm/mediatek: Add dma dev get function")
> Signed-off-by: Stuart Lee <stuart.lee at mediatek.com>
> Cc: stable at vger.kernel.org

Reviewed-by: AngeloGioacchino DEl Regno <angelogioacchino.delregno at collabora.com>