There is a NULL pointer deference in the Allwinner R818 SoC Android Q SDK V1.0 camera driver /dev/cedar_dev that could use the ioctl cmd IOCTL_GET_IOMMU_ADDR to cause a system crash.Referenceshttps://www.allwinnertech.com/index.php?c=product&a=index&id=92https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9ACamera%20Driver%20has%20Null%20Pointer%20Dereference%20Vulnerability.mdhttps://www.cnvd.org.cn/flaw/show/CNVD-2021-49170https://vul.wangan.com/a/CNVD-2021-49170
