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Message-Id: <20180310001021.6437-4-labbott@redhat.com>
Date: Fri, 9 Mar 2018 16:10:20 -0800
From: Laura Abbott <labbott@...hat.com>
To: Linus Walleij <linus.walleij@...aro.org>,
Kees Cook <keescook@...omium.org>,
Nandor Han <nandor.han@...com>,
Semi Malinen <semi.malinen@...com>
Cc: Laura Abbott <labbott@...hat.com>,
linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH 3/4] gpio: Remove VLA from xra1403 driver
The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)
This patch replaces a VLA with an appropriate call to kmalloc_array.
Signed-off-by: Laura Abbott <labbott@...hat.com>
---
drivers/gpio/gpio-xra1403.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-xra1403.c b/drivers/gpio/gpio-xra1403.c
index 0230e4b7a2fb..8d4c8e99b251 100644
--- a/drivers/gpio/gpio-xra1403.c
+++ b/drivers/gpio/gpio-xra1403.c
@@ -126,11 +126,16 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
int reg;
struct xra1403 *xra = gpiochip_get_data(chip);
- int value[xra1403_regmap_cfg.max_register];
+ int *value;
int i;
unsigned int gcr;
unsigned int gsr;
+ value = kmalloc_array(xra1403_regmap_cfg.max_register, sizeof(*value),
+ GFP_KERNEL);
+ if (!value)
+ return;
+
seq_puts(s, "xra reg:");
for (reg = 0; reg <= xra1403_regmap_cfg.max_register; reg++)
seq_printf(s, " %2.2x", reg);
@@ -154,6 +159,7 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip)
(gcr & BIT(i)) ? "in" : "out",
(gsr & BIT(i)) ? "hi" : "lo");
}
+ kfree(value);
}
#else
#define xra1403_dbg_show NULL
--
2.14.3
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