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@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Tue Nov 28 10:49:28 CET 2017
From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Date: Tue, 20 Dec 2016 12:28:19 +0100
Subject: gpio: mockup: dynamically allocate memory for chip name
From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
[ 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@xxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxx are
queue-4.9/gpio-mockup-dynamically-allocate-memory-for-chip-name.patch