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net: openvswitch: fix a NULL pointer dereference 

upcall is dereferenced even when genlmsg_put fails. The fix
goto out to avoid the NULL pointer dereference in this case.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2019-03-14 23:20:16 -05:00 committed by David S. Miller
parent 4477138fa0
commit 6f19893b64
1 changed files with 4 additions and 0 deletions
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4
net/openvswitch/datapath.c
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@ -448,6 +448,10 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
0, upcall_info->cmd);
if (!upcall) {
err = -EINVAL;
goto out;
}
upcall->dp_ifindex = dp_ifindex;
err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb);