| Message ID | 1426759876-9786-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 920616d05758..07b1eee067b1 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -141,7 +141,7 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) u32 *p = NULL; if (!(rt->dst.flags & DST_HOST)) - return NULL; + return dst_cow_metrics_generic(dst, old); peer = rt6_get_peer_create(rt); if (peer) {
This is a note to let you know that I have just added a patch titled ipv6: fix ipv6_cow_metrics for non DST_HOST case to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt9. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From c5846c3202db46188f8451629c66eb192ba061ef Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau <kafai@fb.com> Date: Thu, 12 Feb 2015 16:14:08 -0800 Subject: ipv6: fix ipv6_cow_metrics for non DST_HOST case commit 3b4711757d7903ab6fa88a9e7ab8901b8227da60 upstream. ipv6_cow_metrics() currently assumes only DST_HOST routes require dynamic metrics allocation from inetpeer. The assumption breaks when ndisc discovered router with RTAX_MTU and RTAX_HOPLIMIT metric. Refer to ndisc_router_discovery() in ndisc.c and note that dst_metric_set() is called after the route is created. This patch creates the metrics array (by calling dst_cow_metrics_generic) in ipv6_cow_metrics(). Test: radvd.conf: interface qemubr0 { AdvLinkMTU 1300; AdvCurHopLimit 30; prefix fd00:face:face:face::/64 { AdvOnLink on; AdvAutonomous on; AdvRouterAddr off; }; }; Before: [root@qemu1 ~]# ip -6 r show | egrep -v unreachable fd00:face:face:face::/64 dev eth0 proto kernel metric 256 expires 27sec fe80::/64 dev eth0 proto kernel metric 256 default via fe80::74df:d0ff:fe23:8ef2 dev eth0 proto ra metric 1024 expires 27sec After: [root@qemu1 ~]# ip -6 r show | egrep -v unreachable fd00:face:face:face::/64 dev eth0 proto kernel metric 256 expires 27sec mtu 1300 fe80::/64 dev eth0 proto kernel metric 256 mtu 1300 default via fe80::74df:d0ff:fe23:8ef2 dev eth0 proto ra metric 1024 expires 27sec mtu 1300 hoplimit 30 Fixes: 8e2ec639173f325 (ipv6: don't use inetpeer to store metrics for routes.) Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- net/ipv6/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)