tc: Fix coverity dereference null return value

CID 550702 (#1 of 1): Dereference null return value (NULL_RETURNS)
7. dereference: Dereferencing a pointer that might be NULL ex_type when calling nl_attr_get_u16.

Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/tc.c b/lib/tc.c
index b9a013845..a66dc432f 100644
--- a/lib/tc.c
+++ b/lib/tc.c
@@ -1087,6 +1087,10 @@ nl_parse_act_pedit(struct nlattr *options, struct tc_flower *flower)
         }
 
         ex_type = nl_attr_find_nested(nla, TCA_PEDIT_KEY_EX_HTYPE);
+        if (!ex_type) {
+            return EOPNOTSUPP;
+        }
+
         type = nl_attr_get_u16(ex_type);
 
         err = csum_update_flag(flower, type);