openvswitch: meter: fix NULL pointer dereference in ovs_meter_cmd_reply_start
It seems that the intention of the code is to null check the value
returned by function genlmsg_put. But the current code is null
checking the address of the pointer that holds the value returned
by genlmsg_put.
Fix this by properly null checking the value returned by function
genlmsg_put in order to avoid a pontential null pointer dereference.
Addresses-Coverity-ID: 1461561 ("Dereference before null check")
Addresses-Coverity-ID: 1461562 ("Dereference null return value")
Fixes: 96fbc13d7e77 ("openvswitch: Add meter infrastructure")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c
index 52ddd6c..3fbfc78 100644
--- a/net/openvswitch/meter.c
+++ b/net/openvswitch/meter.c
@@ -99,7 +99,7 @@ ovs_meter_cmd_reply_start(struct genl_info *info, u8 cmd,
*ovs_reply_header = genlmsg_put(skb, info->snd_portid,
info->snd_seq,
&dp_meter_genl_family, 0, cmd);
- if (!ovs_reply_header) {
+ if (!*ovs_reply_header) {
nlmsg_free(skb);
return ERR_PTR(-EMSGSIZE);
}