| Message ID | 20220422032227.2991553-1-yangyingliang@huawei.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | drm/msm/hdmi: check return value after calling platform_get_resource_byname() | expand |
On 4/21/2022 8:22 PM, Yang Yingliang wrote: > It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, > we need check the return value. > > Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)") > Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> > --- > 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 ec324352e862..07e2ad527af9 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > @@ -142,6 +142,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev) > /* HDCP needs physical address of hdmi register */ > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > config->mmio_name); > + if (!res) { > + ret = -EINVAL; > + goto fail; > + } > hdmi->mmio_phy_addr = res->start; > > hdmi->qfprom_mmio = msm_ioremap(pdev, config->qfprom_mmio_name);
On Fri, 22 Apr 2022 at 06:10, Yang Yingliang <yangyingliang@huawei.com> wrote: > > It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, > we need check the return value. > > Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)") > Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.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 ec324352e862..07e2ad527af9 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > @@ -142,6 +142,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev) > /* HDCP needs physical address of hdmi register */ > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > config->mmio_name); > + if (!res) { > + ret = -EINVAL; > + goto fail; > + } > hdmi->mmio_phy_addr = res->start; > > hdmi->qfprom_mmio = msm_ioremap(pdev, config->qfprom_mmio_name); > -- > 2.25.1 >
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index ec324352e862..07e2ad527af9 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -142,6 +142,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev) /* HDCP needs physical address of hdmi register */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, config->mmio_name); + if (!res) { + ret = -EINVAL; + goto fail; + } hdmi->mmio_phy_addr = res->start; hdmi->qfprom_mmio = msm_ioremap(pdev, config->qfprom_mmio_name);
It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, we need check the return value. Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ++++ 1 file changed, 4 insertions(+)