From 5d9d6e91b835796c21fbd7ce479880e5181be112 Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Fri, 11 Feb 2011 01:10:44 -0800 Subject: [PATCH] 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 Acked-by: Aristeu Rozanski Signed-off-by: Dmitry Torokhov --- drivers/input/misc/uinput.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index 82542a1c109..c0888e3d2fb 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -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; -- 2.20.1