linux-kernel - Re: [PATCH 3/3] KEYS: Make the keyring quotas controllable through /proc/sys

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Message-Id: <20080318170438.e4121982.akpm@linux-foundation.org>
Date:	Tue, 18 Mar 2008 17:04:38 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Howells <dhowells@...hat.com>
Cc:	torvalds@...ux-foundation.org, kwc@...i.umich.edu,
	arunsr@....iitk.ac.in, dwalsh@...hat.com,
	linux-security-module@...r.kernel.org, dhowells@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] KEYS: Make the keyring quotas controllable through
 /proc/sys

On Thu, 13 Mar 2008 19:14:42 +0000
David Howells <dhowells@...hat.com> wrote:

> Make the keyring quotas controllable through /proc/sys files:
> 
>  (*) /proc/sys/kernel/keys/root_maxkeys
>      /proc/sys/kernel/keys/root_maxbytes
> 
>      Maximum number of keys that root may have and the maximum total number of
>      bytes of data that root may have stored in those keys.
> 
>  (*) /proc/sys/kernel/keys/maxkeys
>      /proc/sys/kernel/keys/maxbytes
> 
>      Maximum number of keys that each non-root user may have and the maximum
>      total number of bytes of data that each of those users may have stored in
>      their keys.
> 
> Also increase the quotas as a number of people have been complaining that it's
> not big enough.  I'm not sure that it's big enough now either, but on the
> other hand, it can now be set in /etc/sysctl.conf.
> 
> ...
>
>  include/linux/key.h      |    5 +++++
>  kernel/sysctl.c          |    9 +++++++++
>  security/keys/Makefile   |    1 +
>  security/keys/internal.h |   14 ++++++++++----
>  security/keys/key.c      |   23 ++++++++++++++++++-----
>  security/keys/keyctl.c   |   12 +++++++++---
>  security/keys/proc.c     |    9 ++++++---
>  7 files changed, 58 insertions(+), 15 deletions(-)
>
> ...
>
> --- a/security/keys/Makefile
> +++ b/security/keys/Makefile
> @@ -14,3 +14,4 @@ obj-y := \
>  
>  obj-$(CONFIG_KEYS_COMPAT) += compat.o
>  obj-$(CONFIG_PROC_FS) += proc.o
> +obj-$(CONFIG_SYSCTL) += sysctl.o

Could we please have a copy of sysctl.c?  The boring old build system seems
to think it's important.

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