linux-kernel - Re: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.

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Message-ID: <20070828230459.GA15937@infradead.org>
Date:	Wed, 29 Aug 2007 00:04:59 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.

On Tue, Aug 28, 2007 at 04:40:15PM -0600, Eric W. Biederman wrote:
> +When:	September 2010
> +Option: CONFIG_SYSCTL_SYSCALL
> +Why:	The same information is available in a more convenient from
> +	/proc/sys, and none of the sysctl variables appear to be
> +	important performance wise.
> +
> +	Binary sysctls are a long standing source of subtle kernel
> +	bugs and security issues.
> +
> +	When I looked several months ago all I could find after
> +	searching several distributions were 5 user space programs and
> +	glibc (which falls back to /proc/sys) using this syscall.

Umm, no way we're ever going to remove a syscall like this.  Please
stop this deprecration crap.  Just make sure no ones adds more binary
sysctls.

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