linux-kernel - Re: [NET] IPv6 oops bisected

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Message-ID: <4709CF6F.60102@sw.ru>
Date:	Mon, 08 Oct 2007 10:34:23 +0400
From:	"Denis V. Lunev" <den@...ru>
To:	David Miller <davem@...emloft.net>
CC:	herbert@...dor.apana.org.au, jeff@...zik.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, den@...nvz.org
Subject: Re: [NET] IPv6 oops bisected

David Miller wrote:
> From: Herbert Xu <herbert@...dor.apana.org.au>
> Date: Mon, 8 Oct 2007 14:19:42 +0800
> 
>> On Sun, Oct 07, 2007 at 11:16:08PM -0700, David Miller wrote:
>>> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
>>> index a7db84c..7109ad6 100644
>>> --- a/net/ipv6/route.c
>>> +++ b/net/ipv6/route.c
>>> @@ -1188,7 +1188,7 @@ int ip6_route_add(struct fib6_config *cfg)
>>>  	if ((cfg->fc_flags & RTF_REJECT) ||
>>>  	    (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) {
>>>  		/* hold loopback dev/idev if we haven't done so. */
>>> -		if (dev != dev->nd_net->loopback_dev) {
>>> +		if (!dev || (dev != dev->nd_net->loopback_dev)) {
>>>  			if (dev) {
>>>  				dev_put(dev);
>>>  				in6_dev_put(idev);
>> Unfortunately this'll still oops a few lines down when it tries
>> to assign dev->nd_net->loopabck_dev to dev.  The issue here is
>> which namespace are we in if dev is NULL.
> 
> Good catch.
> 
> I'm just going to revert my bogus fix and the original change
> for now.  Denis can resubmit the original patch once this
> is resolved.

OK. I am installing Fedora 7 right now...
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