From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Wen Yang <wen.yang99@zte.com.cn>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Viresh Kumar <viresh.kumar@linaro.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 146/241] cpufreq: pmac32: fix possible object reference leak
Date: Sun, 9 Jun 2019 18:41:28 +0200 [thread overview]
Message-ID: <20190609164151.995736751@linuxfoundation.org> (raw)
In-Reply-To: <20190609164147.729157653@linuxfoundation.org>
[ Upstream commit 8d10dc28a9ea6e8c02e825dab28699f3c72b02d9 ]
The call to of_find_node_by_name returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
./drivers/cpufreq/pmac32-cpufreq.c:557:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 552, but without a corresponding object release within this function.
./drivers/cpufreq/pmac32-cpufreq.c:569:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 552, but without a corresponding object release within this function.
./drivers/cpufreq/pmac32-cpufreq.c:598:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 587, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-pm@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/cpufreq/pmac32-cpufreq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c
index 1f49d97a70ea1..14928e0dc3265 100644
--- a/drivers/cpufreq/pmac32-cpufreq.c
+++ b/drivers/cpufreq/pmac32-cpufreq.c
@@ -549,6 +549,7 @@ static int pmac_cpufreq_init_7447A(struct device_node *cpunode)
volt_gpio_np = of_find_node_by_name(NULL, "cpu-vcore-select");
if (volt_gpio_np)
voltage_gpio = read_gpio(volt_gpio_np);
+ of_node_put(volt_gpio_np);
if (!voltage_gpio){
printk(KERN_ERR "cpufreq: missing cpu-vcore-select gpio\n");
return 1;
@@ -585,6 +586,7 @@ static int pmac_cpufreq_init_750FX(struct device_node *cpunode)
if (volt_gpio_np)
voltage_gpio = read_gpio(volt_gpio_np);
+ of_node_put(volt_gpio_np);
pvr = mfspr(SPRN_PVR);
has_cpu_l2lve = !((pvr & 0xf00) == 0x100);
--
2.20.1
prev parent reply other threads:[~2019-06-09 17:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190609164147.729157653@linuxfoundation.org>
2019-06-09 16:40 ` [PATCH 4.4 069/241] power: supply: sysfs: prevent endless uevent loop with CONFIG_POWER_SUPPLY_DEBUG Greg Kroah-Hartman
2019-06-09 16:41 ` [PATCH 4.4 144/241] cpufreq: ppc_cbe: fix possible object reference leak Greg Kroah-Hartman
2019-06-09 16:41 ` [PATCH 4.4 145/241] cpufreq/pasemi: " Greg Kroah-Hartman
2019-06-09 16:41 ` Greg Kroah-Hartman [this message]
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