The aoedisk_debugfs_show function in drivers/block/aoe/aoeblk.c in the Linux kernel through 4.16.4rc4 allows local users to obtain sensitive address information by reading "ffree: " lines in a debugfs file.
https://github.com/johnsonwangqize/cve-linux/blob/master/CVE-2018-7754.md
https://elixir.bootlin.com/linux/v4.16-rc4/source/drivers/block/aoe/aoeblk.c#L421