netdev - Re: [PATCH v4 net 0/5] ipv6: Fix dst_entry refcnt bugs in ip6

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Message-Id: <20150915.150252.882663449854060859.davem@davemloft.net>
Date:	Tue, 15 Sep 2015 15:02:52 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	kafai@...com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com,
	hannes@...essinduktion.org, kernel-team@...com
Subject: Re: [PATCH v4 net 0/5] ipv6: Fix dst_entry refcnt bugs in
 ip6_tunnel

From: Martin KaFai Lau <kafai@...com>
Date: Tue, 15 Sep 2015 14:30:04 -0700

> v4:
> - Fix a compilation error in patch 5 when CONFIG_LOCKDEP is turned on and
>   re-test it
> 
> v3:
> - Merge a 'if else if' test in patch 4
> - Use rcu_dereference_protected in patch 5 to fix a sparse check when
>   CONFIG_SPARSE_RCU_POINTER is enabled
> 
> v2:
> - Add patch 4 and 5 to remove the spinlock
> 
> v1:
> This patch series is to fix the dst refcnt bugs in ip6_tunnel.
> 
> Patch 1 and 2 are the prep works.  Patch 3 is the fix.
> 
> I can reproduce the bug by adding and removing the ip6gre tunnel
> while running a super_netperf TCP_CRR test.  I get the following
> trace by adding WARN_ON_ONCE(newrefcnt < 0) to dst_release():
 ...

Series applied, thanks.
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