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Date: Wed, 19 Apr 2017 21:18:13 +1000 (AEST)
From: James Morris <>
To: Matt Brown <>
Subject: Re: [PATCH] make TIOCSTI ioctl require CAP_SYS_ADMIN

On Tue, 18 Apr 2017, Matt Brown wrote:

> This patch reproduces GRKERNSEC_HARDEN_TTY functionality from the grsecurity
> project in-kernel.

It seems like an ugly hack to an ugly feature (CAP_SYS_ADMIN barely makes 
sense here), and rather than sprinkling these types of things throughout 
the kernel, I wonder if it might be better to implement it via LSM, in the 
YAMA module.

- James
James Morris

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