linux-kernel - [PATCH 5.18 724/879] ipmi:ipmb: Fix refcount leak in ipmi_ipmb

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Message-Id: <20220607165023.869056542@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:04:02 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miaoqian Lin <linmq006@...il.com>,
        Corey Minyard <cminyard@...sta.com>
Subject: [PATCH 5.18 724/879] ipmi:ipmb: Fix refcount leak in ipmi_ipmb_probe

From: Miaoqian Lin <linmq006@...il.com>

commit a508e33956b538e034ed5df619a73ec7c15bda72 upstream.

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: 00d93611f002 ("ipmi:ipmb: Add the ability to have a separate slave and master device")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Message-Id: <20220512044445.3102-1-linmq006@...il.com>
Cc: stable@...r.kernel.org # v5.17+
Signed-off-by: Corey Minyard <cminyard@...sta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/ipmi/ipmi_ipmb.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/char/ipmi/ipmi_ipmb.c
+++ b/drivers/char/ipmi/ipmi_ipmb.c
@@ -476,6 +476,7 @@ static int ipmi_ipmb_probe(struct i2c_cl
 	slave_np = of_parse_phandle(dev->of_node, "slave-dev", 0);
 	if (slave_np) {
 		slave_adap = of_get_i2c_adapter_by_node(slave_np);
+		of_node_put(slave_np);
 		if (!slave_adap) {
 			dev_notice(&client->dev,
 				   "Could not find slave adapter\n");