netdev - [PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check

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Message-Id: <20230227152352.266109-1-pctammela@mojatatu.com>
Date:   Mon, 27 Feb 2023 12:23:52 -0300
From:   Pedro Tammela <pctammela@...atatu.com>
To:     netdev@...r.kernel.org
Cc:     jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, error27@...il.com, simon.horman@...igine.com,
        Pedro Tammela <pctammela@...atatu.com>
Subject: [PATCH net v2] net/sched: act_connmark: handle errno on tcf_idr_check_alloc

Smatch reports that 'ci' can be used uninitialized.
The current code ignores errno coming from tcf_idr_check_alloc, which
will lead to the incorrect usage of 'ci'. Handle the errno as it should.

Fixes: 288864effe33 ("net/sched: act_connmark: transition to percpu stats and rcu")
Reviewed-by: Jamal Hadi Salim <jhs@...atatu.com>
Signed-off-by: Pedro Tammela <pctammela@...atatu.com>
---
 net/sched/act_connmark.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/sched/act_connmark.c b/net/sched/act_connmark.c
index 8dabfb52ea3d..0d7aee8933c5 100644
--- a/net/sched/act_connmark.c
+++ b/net/sched/act_connmark.c
@@ -158,6 +158,9 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
 		nparms->zone = parm->zone;
 
 		ret = 0;
+	} else {
+		err = ret;
+		goto out_free;
 	}
 
 	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
-- 
2.34.1