The sysctl can have three settings: 0 to do nothing, 1 to emit a warning, 2 to fully enable the patch that blocks argc=0. Use 1 by default as not to break user

The sysctl can have three settings: 0 to do nothing, 1 to emit a warning, 2 to fully enable the patch that blocks argc=0. Use 1 by default as not to break userspace, let people opt-in to 2 for the additional security