3.6.11.1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Steffen Klassert <steffen.klass...@secunet.com>
[ Upstream commit 4ac7bed1ff5f935525a8c71c347bbc8cdff9e067 ]
Routes with locked mtu should not use learned pmtu informations,
so do not update the pmtu on these routes.
Reported-by: Julian Anastasov <j...@ssi.bg>
Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
---
net/ipv4/route.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index fba3240..6d0ae55 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -912,6 +912,9 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct
flowi4 *fl4, u32 mtu)
struct dst_entry *dst = &rt->dst;
struct fib_result res;
+ if (dst_metric_locked(dst, RTAX_MTU))
+ return;
+
if (dst->dev->mtu < mtu)
return;
--
1.7.10.4
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