2020-08-29 17:51:07

by Sumera Priyadarsini

[permalink] [raw]
Subject: [PATCH] bus: qcom-ebi2: Add of_node_put() before return statement

Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control is
transferred from the middle of the loop, as in the case of a return
or break or goto, there is no decrement thus ultimately resulting in
a memory leak.

Fix a potential memory leak in qcom-ebi2.c by inserting
of_node_put() before a return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <[email protected]>
---
drivers/bus/qcom-ebi2.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/qcom-ebi2.c b/drivers/bus/qcom-ebi2.c
index 03ddcf426887..0b8f53a688b8 100644
--- a/drivers/bus/qcom-ebi2.c
+++ b/drivers/bus/qcom-ebi2.c
@@ -353,8 +353,10 @@ static int qcom_ebi2_probe(struct platform_device *pdev)

/* Figure out the chipselect */
ret = of_property_read_u32(child, "reg", &csindex);
- if (ret)
+ if (ret) {
+ of_node_put(child);
return ret;
+ }

if (csindex > 5) {
dev_err(dev,
--
2.17.1