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

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Message-ID: <20121115233909.GA17580@kroah.com>
Date:	Thu, 15 Nov 2012 15:39:09 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Tomas Hozza <thozza@...hat.com>
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

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...

greg k-h
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