Commit 1ea4df4a authored by David S. Miller's avatar David S. Miller Committed by Sasha Levin

decnet: Do not build routes to devices without decnet private data.

[ Upstream commit a36a0d40 ]

In particular, make sure we check for decnet private presence
for loopback devices.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 51319f40
......@@ -1036,10 +1036,13 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *o
if (!fld.daddr) {
fld.daddr = fld.saddr;
err = -EADDRNOTAVAIL;
if (dev_out)
dev_put(dev_out);
err = -EINVAL;
dev_out = init_net.loopback_dev;
if (!dev_out->dn_ptr)
goto out;
err = -EADDRNOTAVAIL;
dev_hold(dev_out);
if (!fld.daddr) {
fld.daddr =
......@@ -1112,6 +1115,8 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *o
if (dev_out == NULL)
goto out;
dn_db = rcu_dereference_raw(dev_out->dn_ptr);
if (!dn_db)
goto e_inval;
/* Possible improvement - check all devices for local addr */
if (dn_dev_islocal(dev_out, fld.daddr)) {
dev_put(dev_out);
......@@ -1153,6 +1158,8 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *o
dev_put(dev_out);
dev_out = init_net.loopback_dev;
dev_hold(dev_out);
if (!dev_out->dn_ptr)
goto e_inval;
fld.flowidn_oif = dev_out->ifindex;
if (res.fi)
dn_fib_info_put(res.fi);
......
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