netdev - [PATCH 1/3 net-next] lib: objagg: Fix an error code in objagg_hints

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Date:   Wed, 13 Feb 2019 11:56:50 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jiri Pirko <jiri@...lanox.com>
Cc:     netdev@...r.kernel.org, Ido Schimmel <idosch@...lanox.com>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/3 net-next] lib: objagg: Fix an error code in
 objagg_hints_get()

We need to set the error code on this path otherwise we return
ERR_PTR(0) which would result in a NULL dereference in the caller.

Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 lib/objagg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/objagg.c b/lib/objagg.c
index 781f41c3c47d..d552ec9c60ed 100644
--- a/lib/objagg.c
+++ b/lib/objagg.c
@@ -968,8 +968,10 @@ struct objagg_hints *objagg_hints_get(struct objagg *objagg,
 	if (err)
 		goto err_fillup_hints;
 
-	if (WARN_ON(objagg_hints->node_count != objagg->obj_count))
+	if (WARN_ON(objagg_hints->node_count != objagg->obj_count)) {
+		err = -EINVAL;
 		goto err_node_count_check;
+	}
 
 	return objagg_hints;
 
-- 
2.17.1