From: Toby Chen Date: Fri, 17 Mar 2023 00:51:26 +0000 (-0700) Subject: drm/rockchip: dw_hdmi: cleanup drm encoder during unbind X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b5af48eedcb53491c02ded55d5991e03d6da6dbf;p=linux.git drm/rockchip: dw_hdmi: cleanup drm encoder during unbind This fixes a use-after-free crash during rmmod. The DRM encoder is embedded inside the larger rockchip_hdmi, which is allocated with the component. The component memory gets freed before the main drm device is destroyed. Fix it by running encoder cleanup before tearing down its container. Signed-off-by: Toby Chen [moved encoder cleanup above clk_disable, similar to bind-error-path] Signed-off-by: Heiko Stuebner Link: https://patchwork.freedesktop.org/patch/msgid/20230317005126.496-1-tobyc@nvidia.com --- diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index 293dcf0f05931..112699949db9f 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -667,6 +667,7 @@ static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master, struct rockchip_hdmi *hdmi = dev_get_drvdata(dev); dw_hdmi_unbind(hdmi->hdmi); + drm_encoder_cleanup(&hdmi->encoder.encoder); clk_disable_unprepare(hdmi->ref_clk); regulator_disable(hdmi->avdd_1v8);