Re: [PATCH v2] printk: Add kernel parameter to disable writes to /dev/kmsg

[Peter Zijlstra]

On Mon, Apr 25, 2016 at 02:56:06PM -0400, Steven Rostedt wrote:
> +static bool __read_mostly devkmsg_disabled;
> +static int __init disable_devkmsg(char *str)
> +{
> +	devkmsg_disabled = true;
> +	return 0;
> +}
> +__setup("printk.disable_kmsg_write", disable_devkmsg);

Again, please default enable and use an easier name to toggle this.
Userspace flooding this with junk is really insane.