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Message-Id: <20220308064522.13804-1-linmq006@gmail.com>
Date: Tue, 8 Mar 2022 06:45:21 +0000
From: Miaoqian Lin <linmq006@...il.com>
To: Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Tobias Jordan <Tobias.Jordan@...ktrobit.com>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: linmq006@...il.com
Subject: [PATCH] remoteproc: qcom_q6v5_mss: Fix some leaks in q6v5_alloc_memory_region
The device_node pointer is returned by of_parse_phandle() or
of_get_child_by_name() with refcount incremented.
We should use of_node_put() on it when done.
This function only call of_node_put(node) when of_address_to_resource
succeeds, missing error cases.
Fixes: 278d744c46fd ("remoteproc: qcom: Fix potential device node leaks")
Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
drivers/remoteproc/qcom_q6v5_mss.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 43ea8455546c..cd220c64db92 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1809,15 +1809,17 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
if (!child)
node = of_parse_phandle(qproc->dev->of_node,
"memory-region", 0);
- else
+ else {
node = of_parse_phandle(child, "memory-region", 0);
+ of_node_put(child);
+ }
ret = of_address_to_resource(node, 0, &r);
+ of_node_put(node);
if (ret) {
dev_err(qproc->dev, "unable to resolve mba region\n");
return ret;
}
- of_node_put(node);
qproc->mba_phys = r.start;
qproc->mba_size = resource_size(&r);
@@ -1828,14 +1830,15 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
} else {
child = of_get_child_by_name(qproc->dev->of_node, "mpss");
node = of_parse_phandle(child, "memory-region", 0);
+ of_node_put(child);
}
ret = of_address_to_resource(node, 0, &r);
+ of_node_put(node);
if (ret) {
dev_err(qproc->dev, "unable to resolve mpss region\n");
return ret;
}
- of_node_put(node);
qproc->mpss_phys = qproc->mpss_reloc = r.start;
qproc->mpss_size = resource_size(&r);
--
2.17.1
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