diff options
Diffstat (limited to 'net/rfkill/core.c')
| -rw-r--r-- | net/rfkill/core.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/net/rfkill/core.c b/net/rfkill/core.c index 2fc4a1724eb8..dbeaf2983822 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -589,11 +589,13 @@ static const char *rfkill_get_type_str(enum rfkill_type type) return "wimax"; case RFKILL_TYPE_WWAN: return "wwan"; + case RFKILL_TYPE_GPS: + return "gps"; default: BUG(); } - BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_WWAN + 1); + BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_GPS + 1); } static ssize_t rfkill_type_show(struct device *dev, @@ -1091,10 +1093,16 @@ static ssize_t rfkill_fop_write(struct file *file, const char __user *buf, struct rfkill_event ev; /* we don't need the 'hard' variable but accept it */ - if (count < sizeof(ev) - 1) + if (count < RFKILL_EVENT_SIZE_V1 - 1) return -EINVAL; - if (copy_from_user(&ev, buf, sizeof(ev) - 1)) + /* + * Copy as much data as we can accept into our 'ev' buffer, + * but tell userspace how much we've copied so it can determine + * our API version even in a write() call, if it cares. + */ + count = min(count, sizeof(ev)); + if (copy_from_user(&ev, buf, count)) return -EFAULT; if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL) |