diff options
Diffstat (limited to 'drivers/input/misc/uinput.c')
-rw-r--r-- | drivers/input/misc/uinput.c | 54 |
1 files changed, 21 insertions, 33 deletions
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index 82542a1c1098..736056897e50 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -302,10 +302,14 @@ static int uinput_validate_absbits(struct input_dev *dev) int retval = 0; for (cnt = 0; cnt < ABS_CNT; cnt++) { + int min, max; if (!test_bit(cnt, dev->absbit)) continue; - if (input_abs_get_max(dev, cnt) <= input_abs_get_min(dev, cnt)) { + min = input_abs_get_min(dev, cnt); + max = input_abs_get_max(dev, cnt); + + if ((min != 0 || max != 0) && max <= min) { printk(KERN_DEBUG "%s: invalid abs[%02x] min:%d max:%d\n", UINPUT_NAME, cnt, @@ -347,8 +351,7 @@ 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)) @@ -362,30 +365,25 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu dev = udev->dev; - user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); - if (!user_dev) - return -ENOMEM; - - if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { - retval = -EFAULT; - goto exit; - } + user_dev = memdup_user(buffer, sizeof(struct uinput_user_dev)); + if (IS_ERR(user_dev)) + return PTR_ERR(user_dev); 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; @@ -622,7 +620,6 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, struct uinput_ff_upload ff_up; struct uinput_ff_erase ff_erase; struct uinput_request *req; - int length; char *phys; retval = mutex_lock_interruptible(&udev->mutex); @@ -689,24 +686,15 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, retval = -EINVAL; goto out; } - length = strnlen_user(p, 1024); - if (length <= 0) { - retval = -EFAULT; - break; + + phys = strndup_user(p, 1024); + if (IS_ERR(phys)) { + retval = PTR_ERR(phys); + goto out; } + kfree(udev->dev->phys); - udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); - if (!phys) { - retval = -ENOMEM; - break; - } - if (copy_from_user(phys, p, length)) { - udev->dev->phys = NULL; - kfree(phys); - retval = -EFAULT; - break; - } - phys[length - 1] = '\0'; + udev->dev->phys = phys; break; case UI_BEGIN_FF_UPLOAD: |