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Input: uinput - fix setting up device name 

The check for non-empty device name was botched since we tried to account
for extra space for the terminating zero at the same time. Convert to
kstrndup() to avoid this problem.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Aristeu Rozanski <aris@ruivo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
David Herrmann 2011-02-11 01:10:44 -08:00 committed by Dmitry Torokhov
parent 26cdb1ae76
commit 5d9d6e91b8
1 changed files with 6 additions and 7 deletions
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13
drivers/input/misc/uinput.c
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@ -347,8 +347,7 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu
{
struct uinput_user_dev *user_dev;
struct input_dev *dev;
char *name;
int i, size;
int i;
int retval;
if (count != sizeof(struct uinput_user_dev))
@ -373,19 +372,19 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu
udev->ff_effects_max = user_dev->ff_effects_max;
size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
if (!size) {
/* Ensure name is filled in */
if (!user_dev->name[0]) {
retval = -EINVAL;
goto exit;
}
kfree(dev->name);
dev->name = name = kmalloc(size, GFP_KERNEL);
if (!name) {
dev->name = kstrndup(user_dev->name, UINPUT_MAX_NAME_SIZE,
GFP_KERNEL);
if (!dev->name) {
retval = -ENOMEM;
goto exit;
}
strlcpy(name, user_dev->name, size);
dev->id.bustype = user_dev->id.bustype;
dev->id.vendor = user_dev->id.vendor;