linux-kernel - [PATCH AUTOSEL 4.9 19/29] net: ibm: fix possible object reference leak

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Message-Id: <20190422194848.13049-19-sashal@kernel.org>
Date:   Mon, 22 Apr 2019 15:48:38 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Wen Yang <wen.yang99@....com.cn>,
        Douglas Miller <dougmill@...ux.ibm.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.9 19/29] net: ibm: fix possible object reference leak

From: Wen Yang <wen.yang99@....com.cn>

[ Upstream commit be693df3cf9dd113ff1d2c0d8150199efdba37f6 ]

The call to ehea_get_eth_dn returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/net/ethernet/ibm/ehea/ehea_main.c:3163:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3154, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@....com.cn>
Cc: Douglas Miller <dougmill@...ux.ibm.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin (Microsoft) <sashal@...nel.org>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index bd719e25dd76..2dd17e01e3a7 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -3184,6 +3184,7 @@ static ssize_t ehea_probe_port(struct device *dev,
 
 	if (ehea_add_adapter_mr(adapter)) {
 		pr_err("creating MR failed\n");
+		of_node_put(eth_dn);
 		return -EIO;
 	}
 
-- 
2.19.1