From af736bf071e8ccf395fa7f7d9d105e020cf609cc Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 18 Feb 2019 12:26:32 +0300
Subject: net: sched: potential NULL dereference in tcf_block_find()
The error code isn't set on this path so it would result in returning
ERR_PTR(0) and a NULL dereference in the caller.
Fixes: 18d3eefb17cf ("net: sched: refactor tcf_block_find() into standalone functions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/sched/cls_api.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'net/sched')
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 9ad53895e604..28592e9f803f 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -1309,8 +1309,10 @@ static struct tcf_block *tcf_block_find(struct net *net, struct Qdisc **q,
goto errout_qdisc;
block = __tcf_block_find(net, *q, *cl, ifindex, block_index, extack);
- if (IS_ERR(block))
+ if (IS_ERR(block)) {
+ err = PTR_ERR(block);
goto errout_qdisc;
+ }
return block;
--
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