[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.si...@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