netdev - Re: 3.19-rc4: BUG: unable to handle kernel paging request at ffff880055f15000 ovs_packet_cmd

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Message-ID: <20150114131314.GB564@casper.infradead.org>
Date:	Wed, 14 Jan 2015 13:13:14 +0000
From:	Thomas Graf <tgraf@...g.ch>
To:	Florian Westphal <fw@...len.de>
Cc:	Sander Eikelenboom <linux@...elenboom.it>,
	Pravin B Shelar <pshelar@...ira.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	dev@...nvswitch.org
Subject: Re: 3.19-rc4:  BUG: unable to handle kernel paging request at
 ffff880055f15000 ovs_packet_cmd_execute+0x1f/0x229

On 01/14/15 at 02:03pm, Florian Westphal wrote:
> Thomas Graf <tgraf@...g.ch> wrote:
> > Copying ovs-dev mailing list and thus qutoing full message.
> > 
> > On 01/14/15 at 01:14pm, Sander Eikelenboom wrote:
> > > Hi,
> > > 
> > > I was testing 3.19-rc4 with openvswitch and encountered the splat below.
> > 
> > What version of OVS are you using? Did this work properly with rc3 or
> > an older kernel?
> 
> seems like it was introduced via 05da5898a96c
> (openvswitch: Add support for OVS_FLOW_ATTR_PROBE).
> 
> It adds test for OVS_FLOW_ATTR_PROBE to ovs_packet_cmd_execute() but
> this function seems to only expect OVS_PACKET_ATTR_* (so we get
> out-of-bounds access)?

Absolutely, just came to the same conclusion independently. I'll send
a fix.
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