linux-kernel - Re: net: nfc: BUG and panic in accept() on 3.5-rc2

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Message-ID: <20120611172545.GA1776@redhat.com>
Date:	Mon, 11 Jun 2012 13:25:45 -0400
From:	Dave Jones <davej@...hat.com>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>,
	lauro.venancio@...nbossa.org, aloisio.almeida@...nbossa.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: net: nfc: BUG and panic in accept() on 3.5-rc2

On Mon, Jun 11, 2012 at 06:56:50PM +0200, Sasha Levin wrote:

 > > > > > > What's trinity ?
 > > > > > > Also, if this one is reproducible, would you mind sharing some details about
 > > > > > > how we could reproduce it ?
 > > > > > 
 > > > > > Well, bugfix should be trivial enough ;)
 > > > > Yep, I looked at the code only after looking at Sasha's report.
 > > > > 
 > > > > Thanks for the patch, do you mind if I add your SOB to it ?
 > > > 
 > > > I  would prefer making sure it fixes the bug first ;)
 > > Sure, although your patch makes sense regardless of that :)
 > > I'll still wait for Sasha to confirm that it fixes his crash.
 > 
 > I don't have a direct way of reproducing it, but I've put it in the test
 > vm and the fuzzer is running, I'll let you know tomorrow if it happened
 > again.

You might be able to trigger it faster by using -P PF_NFC, which will 
force trinity to only use NFC sockets.

sidenote: most protocols trigger the module to be auto-loaded when a socket
is created. This doesn't seem to happen with nfc, making me need to manually
modprobe it first. Intentional ?

	Dave

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