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Message-Id: <20180310001021.6437-3-labbott@redhat.com>
Date: Fri, 9 Mar 2018 16:10:19 -0800
From: Laura Abbott <labbott@...hat.com>
To: Linus Walleij <linus.walleij@...aro.org>,
Kees Cook <keescook@...omium.org>,
Lukas Wunner <lukas@...ner.de>
Cc: Laura Abbott <labbott@...hat.com>,
linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com,
Mathias Duckeck <m.duckeck@...bus.de>
Subject: [PATCH 2/4] gpio: Remove VLA from MAX3191X driver
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)
This patch replaces several a VLA with an appropriate call to
kmalloc_array.
Signed-off-by: Laura Abbott <labbott@...hat.com>
---
drivers/gpio/gpio-max3191x.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-max3191x.c b/drivers/gpio/gpio-max3191x.c
index f74b1072e84b..b5b9cb1fda50 100644
--- a/drivers/gpio/gpio-max3191x.c
+++ b/drivers/gpio/gpio-max3191x.c
@@ -315,12 +315,17 @@ static void gpiod_set_array_single_value_cansleep(unsigned int ndescs,
struct gpio_desc **desc,
int value)
{
- int i, values[ndescs];
+ int i, *values;
+
+ values = kmalloc_array(ndescs, sizeof(*values), GFP_KERNEL);
+ if (!values)
+ return;
for (i = 0; i < ndescs; i++)
values[i] = value;
gpiod_set_array_value_cansleep(ndescs, desc, values);
+ kfree(values);
}
static struct gpio_descs *devm_gpiod_get_array_optional_count(
--
2.14.3
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