net: ncsi: fix a missing check for nla_nest_start

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>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c
index 5d782445d2fc..bad17bba8ba7 100644
--- a/net/ncsi/ncsi-netlink.c
+++ b/net/ncsi/ncsi-netlink.c
@@ -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);