Re: PROBLEM: 2.6.11-rc2 hangs on bridge shutdown (br0)

[Herbert Xu]

On Sat, Feb 05, 2005 at 09:45:59PM +1100, herbert wrote:
> 
> Although I still think this is a bug, I'm now starting to suspect
> that there is another bug around as well.
> 
> There is probably an ifp leak which in turn leads to a split dst
> leak that allows the first bug to make its mark.

Found it.  This is what happens:

lo goes down =>
	rt6_ifdown =>
		eth0's local address route gets deleted

eth0 goes down =>
	__ipv6_ifa_notify =>
		ip6_del_rt fails so we fall through to the
		dst_free path.  At this point the refcount
		taken by __ipv6_ifa_notify is leaked.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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