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Message-Id: <20180528100249.436741026@linuxfoundation.org>
Date: Mon, 28 May 2018 12:02:12 +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, Lenny Szubowicz <lszubowi@...hat.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 099/272] ACPI: acpi_pad: Fix memory leak in power saving threads
4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lenny Szubowicz <lszubowi@...hat.com>
[ Upstream commit 8b29d29abc484d638213dd79a18a95ae7e5bb402 ]
Fix once per second (round_robin_time) memory leak of about 1 KB in
each acpi_pad kernel idling thread that is activated.
Found by testing with kmemleak.
Signed-off-by: Lenny Szubowicz <lszubowi@...hat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/acpi/acpi_pad.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -110,6 +110,7 @@ static void round_robin_cpu(unsigned int
cpumask_andnot(tmp, cpu_online_mask, pad_busy_cpus);
if (cpumask_empty(tmp)) {
mutex_unlock(&round_robin_lock);
+ free_cpumask_var(tmp);
return;
}
for_each_cpu(cpu, tmp) {
@@ -127,6 +128,8 @@ static void round_robin_cpu(unsigned int
mutex_unlock(&round_robin_lock);
set_cpus_allowed_ptr(current, cpumask_of(preferred_cpu));
+
+ free_cpumask_var(tmp);
}
static void exit_round_robin(unsigned int tsk_index)
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