2020-08-31 03:11:50

by Sumera Priyadarsini

[permalink] [raw]
Subject: [PATCH] bus: arm: Add of_node_put() before break 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 arm-cci.c by inserting
of_node_put() before a break statement.

Issue found with Coccinelle.

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

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index b8184a903583..1f84a5528073 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -461,8 +461,10 @@ static int cci_probe_ports(struct device_node *np)

i = nb_ace + nb_ace_lite;

- if (i >= nb_cci_ports)
+ if (i >= nb_cci_ports) {
+ of_node_put(cp);
break;
+ }

if (of_property_read_string(cp, "interface-type",
&match_str)) {
--
2.17.1