From: Kangjie Lu <[email protected]>
Upstream commit:
commit 0fff9bd47e1341b5c4db862cc39fc68ce45f165d
Author: Kangjie Lu <[email protected]>
Date: Fri Mar 15 01:11:22 2019 -0500
net: openvswitch: fix missing checks for nla_nest_start
nla_nest_start may fail and thus deserves a check.
The fix returns -EMSGSIZE when it fails.
Signed-off-by: Kangjie Lu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Cc: Kangjie Lu <[email protected]>
Signed-off-by: Greg Rose <[email protected]>
---
datapath/datapath.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/datapath/datapath.c b/datapath/datapath.c
index 1340d6b..94e4f6f 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -476,6 +476,10 @@ static int queue_userspace_packet(struct datapath *dp,
struct sk_buff *skb,
if (upcall_info->egress_tun_info) {
nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY);
+ if (!nla) {
+ err = -EMSGSIZE;
+ goto out;
+ }
err = ovs_nla_put_tunnel_info(user_skb,
upcall_info->egress_tun_info);
BUG_ON(err);
@@ -484,6 +488,10 @@ static int queue_userspace_packet(struct datapath *dp,
struct sk_buff *skb,
if (upcall_info->actions_len) {
nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS);
+ if (!nla) {
+ err = -EMSGSIZE;
+ goto out;
+ }
err = ovs_nla_put_actions(upcall_info->actions,
upcall_info->actions_len,
user_skb);
--
1.8.3.1
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