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authorDavid S. Miller <davem@davemloft.net>2016-04-10 23:01:30 -0400
committerSasha Levin <sasha.levin@oracle.com>2016-07-10 23:07:20 -0400
commit1ea4df4a2642ba2856a70e4530ae922f0c8e672e (patch)
treef18bda2cfcb8482a9df605701c641caf10fbb070 /net
parent51319f40e513500085f25ae42ace31b8bc4bcfc2 (diff)
decnet: Do not build routes to devices without decnet private data.
[ Upstream commit a36a0d4008488fa545c74445d69eaf56377d5d4e ] In particular, make sure we check for decnet private presence for loopback devices. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'net')
-rw-r--r--net/decnet/dn_route.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 03227ffd19ce..76d3bf70c31a 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -1036,10 +1036,13 @@ source_ok:
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 @@ source_ok:
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 @@ select_source:
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);