From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ 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@iscas.ac.cn Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Patchwork: https://patchwork.freedesktop.org/patch/517211/ Link: https://lore.kernel.org/r/20230106023011.3985-1-jiasheng@iscas.ac.cn Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index 74759bcc68ff0..74b806b3e65f4 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -248,6 +248,10 @@ 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)) {