net: ncsi: fix a missing check for nla_nest_start
authorKangjie Lu <kjlu@umn.edu>
Fri, 15 Mar 2019 06:14:33 +0000 (01:14 -0500)
committerDavid S. Miller <davem@davemloft.net>
Sat, 16 Mar 2019 18:44:33 +0000 (11:44 -0700)
nla_nest_start may fail and thus deserves a check.

The fix returns -EMSGSIZE in case it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ncsi/ncsi-netlink.c

index 5d782445d2fcf629367777f415e000eb326eab2a..bad17bba8ba786f589212a2575d346850bab6300 100644 (file)
@@ -251,6 +251,10 @@ static int ncsi_pkg_info_all_nl(struct sk_buff *skb,
        }
 
        attr = nla_nest_start(skb, NCSI_ATTR_PACKAGE_LIST);
+       if (!attr) {
+               rc = -EMSGSIZE;
+               goto err;
+       }
        rc = ncsi_write_package_info(skb, ndp, package->id);
        if (rc) {
                nla_nest_cancel(skb, attr);