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My system is ajay@latitude-3480:~$ uname -a Linux latitude-3480 4.13.0-38-generic #43~16.04.1-Ubuntu SMP Wed Mar 14 17:48:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux When I see the address for a symbol, say linux_banner, in /boot/System.map-4.13.0-38-generic, it shows ffffffff81e00120 R linux_banner However, when I see it in /proc/kallsyms, it shows ffffffffa7000120 R linux_banner Also, I note that /proc/kallsyms addresses vary upon reboots, so I am a little confused as to what the entries in /proc/kallsyms really mean. So, will be grateful for some pointers from the experts :) Thanks and Regards, Ajay