linux-kernel - Re: BUG: 2.6.25-rc1: iptables postrouting setup causes oops

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Message-ID: <47B31DE7.9060400@kernel.org>
Date:	Wed, 13 Feb 2008 08:42:15 -0800
From:	"Andrew G. Morgan" <morgan@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Haavard Skinnemoen <hskinnemoen@...el.com>,
	Ben Nizette <bn@...sdigital.com>,
	netfilter-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: BUG: 2.6.25-rc1: iptables postrouting setup causes oops

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Haavard,

It means your application is not capable(sic) of using the upper 32-bits
of the 64-bit capability sets supported by this newer kernel.

You might consider rebuilding the offending application linking it
against a newer version of libcap:

http://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/

However, it is a warning and, for any existing app that doesn't care
about newly added capabilities, the warning is benign.

Cheers

Andrew

Andrew Morton wrote:
| On Wed, 13 Feb 2008 10:10:24 +0100 Haavard Skinnemoen
<hskinnemoen@...el.com> wrote:
|
|> On Wed, 13 Feb 2008 00:48:29 -0800
|> Andrew Morton <akpm@...ux-foundation.org> wrote:
|>
|>> On Tue, 12 Feb 2008 22:46:01 +1100 Ben Nizette <bn@...sdigital.com>
wrote:
|>>
|>>> On an AVR32, root over NFS, config attached, running (from a startup
|>>> script):
|>>>
|>>> iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
|>>>
|>>> Results in (dmesg extract including a bit of context for good measure):
|>>> -------------8<----------------
|>>> VFS: Mounted root (nfs filesystem).
|>>> Freeing init memory: 72K (90000000 - 90012000)
|>>> eth0: no IPv6 routers present
|>>> warning: `dnsmasq' uses 32-bit capabilities (legacy support in use)
|> Hmm. What does that mean? What size do capabilities normally have?
|
| My near-namesake put than in, but I immediately forgot what it means?
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