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Message-Id: <20191219183215.873963985@linuxfoundation.org>
Date: Thu, 19 Dec 2019 19:34:01 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 133/162] pinctrl: samsung: Fix device node refcount leaks in S3C64xx wakeup controller init
From: Krzysztof Kozlowski <krzk@...nel.org>
[ Upstream commit 7f028caadf6c37580d0f59c6c094ed09afc04062 ]
In s3c64xx_eint_eint0_init() the for_each_child_of_node() loop is used
with a break to find a matching child node. Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it. This leads to leak of device node.
Cc: <stable@...r.kernel.org>
Fixes: 61dd72613177 ("pinctrl: Add pinctrl-s3c64xx driver")
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/pinctrl/samsung/pinctrl-s3c64xx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pinctrl/samsung/pinctrl-s3c64xx.c b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c
index 43407ab248f51..0cd9f3a7bb11a 100644
--- a/drivers/pinctrl/samsung/pinctrl-s3c64xx.c
+++ b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c
@@ -713,6 +713,7 @@ static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d)
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(dev, "could not allocate memory for wkup eint data\n");
+ of_node_put(eint0_np);
return -ENOMEM;
}
data->drvdata = d;
@@ -723,6 +724,7 @@ static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d)
irq = irq_of_parse_and_map(eint0_np, i);
if (!irq) {
dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i);
+ of_node_put(eint0_np);
return -ENXIO;
}
@@ -730,6 +732,7 @@ static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d)
s3c64xx_eint0_handlers[i],
data);
}
+ of_node_put(eint0_np);
bank = d->pin_banks;
for (i = 0; i < d->nr_banks; ++i, ++bank) {
--
2.20.1
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