linux-kernel - Re: [PATCH] tools: hv: Netlink source address validation allows DoS

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Message-ID: <281332898.21894.1353050503909.JavaMail.root@redhat.com>
Date:	Fri, 16 Nov 2012 02:21:43 -0500 (EST)
From:	Tomas Hozza <thozza@...hat.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	olaf@...fle.de, apw@...onical.com, jasowang@...hat.com,
	kys@...rosoft.com
Subject: Re: [PATCH] tools: hv: Netlink source address validation allows DoS

----- Original Message -----
> On Thu, Nov 08, 2012 at 10:53:29AM +0100, Tomas Hozza wrote:
> > The source code without this patch caused hypervkvpd to exit when
> > it processed
> > a spoofed Netlink packet which has been sent from an untrusted
> > local user.
> > Now Netlink messages with a non-zero nl_pid source address are
> > ignored
> > and a warning is printed into the syslog.
> > 
> > Signed-off-by: Tomas Hozza <thozza@...hat.com>
> > Acked-by:  K. Y. Srinivasan <kys@...rosoft.com>
> > ---
> >  tools/hv/hv_kvp_daemon.c | 8 +++++++-
> >  1 file changed, 7 insertions(+), 1 deletion(-)
> > 
> > diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
> > index 13c2a14..c1d9102 100755
> 
> Why are you setting a .c file to executable permissions?  Something
> is really wrong here...

I'm sorry, this is a mistake and unfortunately I missed it.
Permissions should be 0644. Will check more carefully next time.

Regards,

Tomas Hozza
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