linux-kernel - Re: [PATCH 1/1] security: introduce fs caps

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Date:	Fri, 17 Nov 2006 19:37:41 +0100
From:	Chris Friedhoff <chris@...edhoff.org>
To:	"Bill O'Donnell" <billodo@....com>
Cc:	KaiGai Kohei <kaigai@...jp.nec.com>,
	"Serge E. Hallyn" <serue@...ibm.com>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Chris Wright <chrisw@...s-sol.org>,
	Andrew Morton <akpm@...l.org>,
	KaiGai Kohei <kaigai@...gai.gr.jp>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [PATCH 1/1] security: introduce fs caps

> Good quesion.  My gentoo ia32 machine uses libcap.so.1.10.  Probably a FAQ, 
> but is 1.92 actually older than 1.10?
looking at these locations, yes
http://www.me.kernel.org/pub/linux/libs/security/linux-privs/old/kernel-2.3/
http://ftp.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.4/

> | Kaigai also provides a srpm package to compile.
> |  VFS Capability Support -> fscaps version 1.0 [SRPM]
> | (http://www.kaigai.gr.jp/pub/fscaps-1.0-kg.src.rpm)
> 
> I'll try that next.

I installed sles10 in qemu on my pentium-m laptop, compiled  a kernel
with fscap support and installed fscaps-1.0-kg.i386.rpm and got "Invalid
argument (errno=22)" error.
trace output is attached

# id
uid=0(root) gid=0(root) groups=0(root)
# uname -a
Linux sles10 2.6.19-rc3-fscaps-a #2 Fri Nov 17 09:17:40 CET 2006 i686
i686 i386 GNU/Linux
# rpm -q fscaps
fscaps-1.0-kg
# zgrep -i capa /proc/config.gz
CONFIG_SECURITY_FS_CAPABILITIES=y
# setfcaps cap_net_raw=ep /bin/ping
/bin/ping: Invalid argument (errno=22)
# setfcaps cap_sys_module=ep /sbin/modprobe
/sbin/modprobe: Invalid argument (errno=22)
# ls -l /lib/libcap.so*
lrwxrwxrwx 1 root root    11 Nov 17 09:51 /lib/libcap.so -> libcap.so.1
lrwxrwxrwx 1 root root    14 Nov 16 11:57 /lib/libcap.so.1 ->
libcap.so.1.92 -rwxr-xr-x 1 root root 10456 Jun 16
15:14 /lib/libcap.so.1.92



--------------------
Chris Friedhoff
chris@...edhoff.org


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