Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Miaoqian Lin <linmq006@gmail.com>,
        Brian Masney <masneyb@onstation.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15 190/779] soc: qcom: ocmem: Fix refcount leak in of_get_ocmem
Date:   Mon, 15 Aug 2022 19:57:14 +0200
Message-Id: <20220815180345.372294228@linuxfoundation.org>
In-Reply-To: <20220815180337.130757997@linuxfoundation.org>
References: <20220815180337.130757997@linuxfoundation.org>
User-Agent: quilt/0.67
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit 92a563fcf14b3093226fb36f12e9b5cf630c5a5d ]

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.
of_node_put() will check NULL pointer.

Fixes: 88c1e9404f1d ("soc: qcom: add OCMEM driver")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220602042430.1114-1-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soc/qcom/ocmem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soc/qcom/ocmem.c b/drivers/soc/qcom/ocmem.c
index 85f82e195ef8..1dfdd0b9ba24 100644
--- a/drivers/soc/qcom/ocmem.c
+++ b/drivers/soc/qcom/ocmem.c
@@ -194,14 +194,17 @@ struct ocmem *of_get_ocmem(struct device *dev)
 	devnode = of_parse_phandle(dev->of_node, "sram", 0);
 	if (!devnode || !devnode->parent) {
 		dev_err(dev, "Cannot look up sram phandle\n");
+		of_node_put(devnode);
 		return ERR_PTR(-ENODEV);
 	}
 
 	pdev = of_find_device_by_node(devnode->parent);
 	if (!pdev) {
 		dev_err(dev, "Cannot find device node %s\n", devnode->name);
+		of_node_put(devnode);
 		return ERR_PTR(-EPROBE_DEFER);
 	}
+	of_node_put(devnode);
 
 	ocmem = platform_get_drvdata(pdev);
 	if (!ocmem) {
-- 
2.35.1