This is a note to let you know that I've just added the patch titled drm/msm/hdmi: Add missing check for alloc_ordered_workqueue to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-msm-hdmi-add-missing-check-for-alloc_ordered_wor.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 38d6a2ff318730b3b10dd05551207bcdfc161ceb Author: Jiasheng Jiang <jiasheng@xxxxxxxxxxx> Date: Fri Jan 6 10:30:11 2023 +0800 drm/msm/hdmi: Add missing check for alloc_ordered_workqueue [ Upstream commit afe4cb96153a0d8003e4e4ebd91b5c543e10df84 ] Add check for the return value of alloc_ordered_workqueue as it may return NULL pointer and cause NULL pointer dereference in `hdmi_hdcp.c` and `hdmi_hpd.c`. Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)") Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Patchwork: https://patchwork.freedesktop.org/patch/517211/ Link: https://lore.kernel.org/r/20230106023011.3985-1-jiasheng@xxxxxxxxxxx Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index e03f08757b252..b75067854b4d7 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -254,6 +254,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); + if (!hdmi->workq) { + ret = -ENOMEM; + goto fail; + } hdmi->i2c = msm_hdmi_i2c_init(hdmi); if (IS_ERR(hdmi->i2c)) {