linux-kernel - [PATCH 4.9 082/159] memory: of: Fix refcount leak bug in of_get_ddr

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Message-Id: <20221024112952.419317221@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:30:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liang He <windhl@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 082/159] memory: of: Fix refcount leak bug in of_get_ddr_timings()

From: Liang He <windhl@....com>

[ Upstream commit 05215fb32010d4afb68fbdbb4d237df6e2d4567b ]

We should add the of_node_put() when breaking out of
for_each_child_of_node() as it will automatically increase
and decrease the refcount.

Fixes: e6b42eb6a66c ("memory: emif: add device tree support to emif driver")
Signed-off-by: Liang He <windhl@....com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Link: https://lore.kernel.org/r/20220719085640.1210583-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/memory/of_memory.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/memory/of_memory.c b/drivers/memory/of_memory.c
index 568f05ed961a..36517b7d093e 100644
--- a/drivers/memory/of_memory.c
+++ b/drivers/memory/of_memory.c
@@ -135,6 +135,7 @@ const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
 	for_each_child_of_node(np_ddr, np_tim) {
 		if (of_device_is_compatible(np_tim, tim_compat)) {
 			if (of_do_get_timings(np_tim, &timings[i])) {
+				of_node_put(np_tim);
 				devm_kfree(dev, timings);
 				goto default_timings;
 			}
-- 
2.35.1