linux-kernel - [PATCH 5.15 074/247] net: ethernet: ti: am65-cpsw-nuss: Fix some refcount leaks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220613094925.203534986@linuxfoundation.org>
Date:   Mon, 13 Jun 2022 12:09:36 +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>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 074/247] net: ethernet: ti: am65-cpsw-nuss: Fix some refcount leaks

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

[ Upstream commit 5dd89d2fc438457811cbbec07999ce0d80051ff5 ]

of_get_child_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
am65_cpsw_init_cpts() and am65_cpsw_nuss_probe() don't release
the refcount in error case.
Add missing of_node_put() to avoid refcount leak.

Fixes: b1f66a5bee07 ("net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support")
Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 130346f74ee8..ea9d073e87fa 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1802,6 +1802,7 @@ static int am65_cpsw_init_cpts(struct am65_cpsw_common *common)
 	if (IS_ERR(cpts)) {
 		int ret = PTR_ERR(cpts);
 
+		of_node_put(node);
 		if (ret == -EOPNOTSUPP) {
 			dev_info(dev, "cpts disabled\n");
 			return 0;
@@ -2668,9 +2669,9 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
 	if (!node)
 		return -ENOENT;
 	common->port_num = of_get_child_count(node);
+	of_node_put(node);
 	if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS)
 		return -ENOENT;
-	of_node_put(node);
 
 	common->rx_flow_id_base = -1;
 	init_completion(&common->tdown_complete);
-- 
2.35.1