Hi, This patch series fixes a potential NULL pointer dereference when using drm_atomic_helper_connector_hdmi_check() to check a DRM atomic commit which tries to disable a HDMI connector. Patch 1 adds necessary checks to avoid the potential NULL pointer dereference. Patch 2 adds a KUnit test case to make sure that atomic check succeeds when disabling a HDMI connector. Patch 1 is tested with i.MX8MP imx-lcdif, but not tested with sun4i and rockchip due to no HW access. v2: * Trim backtrace in patch 1's commit message. (Dmitry) * Drop timestamps from backtrace in patch 1's commit message. (Dmitry) * Move the necessary checks from drm_bridge_connector_atomic_check() to drm_atomic_helper_connector_hdmi_check(). (Dmitry) * Add the KUnit test case in patch 2. (Dmitry) Liu Ying (2): drm/connector: hdmi: Do atomic check when necessary drm/tests: hdmi: Add connector disablement test .../gpu/drm/display/drm_hdmi_state_helper.c | 3 ++ .../drm/tests/drm_hdmi_state_helper_test.c | 52 +++++++++++++++++++ 2 files changed, 55 insertions(+) -- 2.34.1
