[dpdk-dev] [PATCH] examples/ip_pipeline: fix null pointer deref

[Jasvinder Singh]

Fixes null pointer dereference issue raised by coverity.

Coverity issue: 325728, 325729, 325731, 325738
Fixes: 27b333b23237 ("examples/ip_pipeline: track table rules on add bulk")

Signed-off-by: Jasvinder Singh <jasvinder.singh at intel.com>
---
 examples/ip_pipeline/cli.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/examples/ip_pipeline/cli.c b/examples/ip_pipeline/cli.c
index 3de620682..910386282 100644
--- a/examples/ip_pipeline/cli.c
+++ b/examples/ip_pipeline/cli.c
@@ -6841,20 +6841,26 @@ cli_rule_file_process(const char *file_name,
 	return 0;
 
 cli_rule_file_process_free:
-	*rule_list = NULL;
-	*n_rules = rule_id;
-	*line_number = line_id;
+	if (rule_list != NULL)
+		*rule_list = NULL;
 
-	for ( ; ; ) {
-		struct table_rule *rule;
+	if (n_rules != NULL)
+		*n_rules = rule_id;
 
-		rule = TAILQ_FIRST(list);
-		if (rule == NULL)
-			break;
+	if (line_number != NULL)
+		*line_number = line_id;
 
-		TAILQ_REMOVE(list, rule, node);
-		free(rule);
-	}
+	if (list != NULL)
+		for ( ; ; ) {
+			struct table_rule *rule;
+
+			rule = TAILQ_FIRST(list);
+			if (rule == NULL)
+				break;
+
+			TAILQ_REMOVE(list, rule, node);
+			free(rule);
+		}
 
 	if (f)
 		fclose(f);
-- 
2.17.1