http://forums.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/t/sysrq-magic-sysrq-key/8079
Sounds like a possible privilege escalation hole and/or a feature that can easily be abused. Kernel Hardening - security-misc SysRq is also dubbed Secure Access Key . That’s only the k option of SysRq, not the whole thing.