Re: [PATCH v3 net 0/5] ipv6: Fix dst_entry refcnt bugs in ip6_tunnel

David Miller
2015-09-15T02:49:28Z

From: Martin KaFai Lau <kafai@fb.com>
Date: Fri, 11 Sep 2015 11:06:16 -0700

> 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 Martin.