-The /dev/mem file in Linux systems is directly mapped to physical memory. This can be disastrous if an attacker gains root access, as the attacker would have direct access to physical memory through this convenient device file. It may not always be possible to disable such file, as some applications might need such support. In that case, then this device file should be available only for authenticated applications.
+The /dev/mem file in Linux systems is directly mapped to physical memory. This
+can be disastrous if an attacker gains root access, as the attacker would have
+direct access to physical memory through this convenient device file. It may not
+always be possible to disable such file, as some applications might need such
+support. In that case, then this device file should be available only for
+authenticated applications.