bridge: initialize fake_rtable metrics
bridge netfilter code uses a fake_rtable, and we must init its _metric
field or risk NULL dereference later.
Ref: https://bugzilla.kernel.org/show_bug.cgi?id=35672
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index e1f5ec7..3fa1231 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -117,6 +117,10 @@
* ipt_REJECT needs it. Future netfilter modules might
* require us to fill additional fields.
*/
+static const u32 br_dst_default_metrics[RTAX_MAX] = {
+ [RTAX_MTU - 1] = 1500,
+};
+
void br_netfilter_rtable_init(struct net_bridge *br)
{
struct rtable *rt = &br->fake_rtable;
@@ -124,7 +128,7 @@
atomic_set(&rt->dst.__refcnt, 1);
rt->dst.dev = br->dev;
rt->dst.path = &rt->dst;
- dst_metric_set(&rt->dst, RTAX_MTU, 1500);
+ dst_init_metrics(&rt->dst, br_dst_default_metrics, true);
rt->dst.flags = DST_NOXFRM;
rt->dst.ops = &fake_dst_ops;
}