netdev - [PATCH net] net/ip6_tunnel: fix dst leak

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Message-Id: <9dd416a82166a27f5cf5eda71a63222a0eb96c04.1447859978.git.pabeni@redhat.com>
Date:	Wed, 18 Nov 2015 16:40:19 +0100
From:	Paolo Abeni <pabeni@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Martin KaFai Lau <kafai@...com>
Subject: [PATCH net] net/ip6_tunnel: fix dst leak

the commit cdf3464e6c6b ("ipv6: Fix dst_entry refcnt bugs in ip6_tunnel")
introduced percpu storage for ip6_tunnel dst cache, but while clearing
such cache it used raw_cpu_ptr to walk the per cpu entries, so cached
dst on non current cpu are not actually reset.

This patch replaces raw_cpu_ptr with per_cpu_ptr, properly cleaning
such storage.

Fixes: cdf3464e6c6b ("ipv6: Fix dst_entry refcnt bugs in ip6_tunnel")

Signed-off-by: Paolo Abeni <pabeni@...hat.com>
---
 net/ipv6/ip6_tunnel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index eabffbb..137fca4 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -177,7 +177,7 @@ void ip6_tnl_dst_reset(struct ip6_tnl *t)
 	int i;
 
 	for_each_possible_cpu(i)
-		ip6_tnl_per_cpu_dst_set(raw_cpu_ptr(t->dst_cache), NULL);
+		ip6_tnl_per_cpu_dst_set(per_cpu_ptr(t->dst_cache, i), NULL);
 }
 EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset);
 
-- 
1.8.3.1

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