diff options
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index c238116400b3..114efd8dc8f5 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -626,8 +626,11 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, abs.maximum = dev->absmax[t]; abs.fuzz = dev->absfuzz[t]; abs.flat = dev->absflat[t]; + abs.resolution = dev->absres[t]; - if (copy_to_user(p, &abs, sizeof(struct input_absinfo))) + if (copy_to_user(p, &abs, min_t(size_t, + _IOC_SIZE(cmd), + sizeof(struct input_absinfo)))) return -EFAULT; return 0; @@ -654,8 +657,9 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, t = _IOC_NR(cmd) & ABS_MAX; - if (copy_from_user(&abs, p, - sizeof(struct input_absinfo))) + if (copy_from_user(&abs, p, min_t(size_t, + _IOC_SIZE(cmd), + sizeof(struct input_absinfo)))) return -EFAULT; /* @@ -670,6 +674,8 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, dev->absmax[t] = abs.maximum; dev->absfuzz[t] = abs.fuzz; dev->absflat[t] = abs.flat; + dev->absres[t] = _IOC_SIZE(cmd) < sizeof(struct input_absinfo) ? + 0 : abs.resolution; spin_unlock_irq(&dev->event_lock); |