In the linux kernel, the following vulnerability has been resolved medianxp imx8-isi check whether crossbar pad is non-null before access whentranslating source to sink streams in the crossbar subdev, the driver triesto locate the remote subdev connected to the sink pad. the remote pad maybe null, if userspace tries to enable a stream that ends at an unconnectedcrossbar sink. when that occurs, the driver dereferences the null pad,leading to a crash. prevent the crash by checking if the pad is null beforeusing it, and return an error if it is.