Patch "gpio: mockup: dynamically allocate memory for chip name" has been added to the 4.9-stable tree

Patch "gpio: mockup: dynamically allocate memory for chip name" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    gpio: mockup: dynamically allocate memory for chip name

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-mockup-dynamically-allocate-memory-for-chip-name.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Tue Nov 28 10:49:28 CET 2017
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Tue, 20 Dec 2016 12:28:19 +0100
Subject: gpio: mockup: dynamically allocate memory for chip name

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>


[ Upstream commit ad6d8004fa29a8958381b60215e32d1e903b0492 ]

Currently the chip name buffer is allocated on the stack and the
address of the buffer is passed to the gpio framework. It's invalid
after probe() returns, so the sysfs label attribute displays garbage.

Use devm_kasprintf() for each string instead.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpio/gpio-mockup.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -126,7 +126,7 @@ static int mockup_gpio_probe(struct plat
 	int i;
 	int base;
 	int ngpio;
-	char chip_name[sizeof(GPIO_NAME) + 3];
+	char *chip_name;
 
 	if (gpio_mockup_params_nr < 2)
 		return -EINVAL;
@@ -146,8 +146,12 @@ static int mockup_gpio_probe(struct plat
 			ngpio = gpio_mockup_ranges[i * 2 + 1] - base;
 
 		if (ngpio >= 0) {
-			sprintf(chip_name, "%s-%c", GPIO_NAME,
-				pins_name_start + i);
+			chip_name = devm_kasprintf(dev, GFP_KERNEL,
+						   "%s-%c", GPIO_NAME,
+						   pins_name_start + i);
+			if (!chip_name)
+				return -ENOMEM;
+
 			ret = mockup_gpio_add(dev, &cntr[i],
 					      chip_name, base, ngpio);
 		} else {


Patches currently in stable-queue which might be from bgolaszewski@baylibre.com are

queue-4.9/gpio-mockup-dynamically-allocate-memory-for-chip-name.patch