The /proc/kallsyms values are identical across identical kernel compilations.
Suppose you have a vulnerable CentOS 7 system that you want to exploit - you could get the proper addresses from your own CentOS 7 VM running the same kernel, apply those to a modified exploit compilation, and run that compilation on your target host.
Suppose you have a vulnerable CentOS 7 system that you want to exploit - you could get the proper addresses from your own CentOS 7 VM running the same kernel, apply those to a modified exploit compilation, and run that compilation on your target host.