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net: openvswitch: fix missing checks for nla_nest_start

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nla_nest_start may fail and thus deserves a check.
The fix returns -EMSGSIZE when it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2019-03-15 01:11:22 -05:00 committed by David S. Miller
parent 6f19893b64
commit 0fff9bd47e
1 changed files with 8 additions and 0 deletions
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8
net/openvswitch/datapath.c
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@ -464,6 +464,10 @@ 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);
@ -472,6 +476,10 @@ 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);