diff options
Diffstat (limited to 'drivers/char/raw.c')
| -rw-r--r-- | drivers/char/raw.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/char/raw.c b/drivers/char/raw.c index 6ffbb517c..61dfd6e42 100644 --- a/drivers/char/raw.c +++ b/drivers/char/raw.c @@ -197,7 +197,12 @@ int raw_ctl_ioctl(struct inode *inode, raw_device_bindings[minor] = bdget(kdev_t_to_nr(MKDEV(rq.block_major, rq.block_minor))); } else { - kdev_t dev=to_kdev_t(raw_device_bindings[minor]->bd_dev); + kdev_t dev; + if (!raw_device_bindings[minor]) { + err = -ENODEV; + break; + } + dev = to_kdev_t(raw_device_bindings[minor]->bd_dev); rq.block_major = MAJOR(dev); rq.block_minor = MINOR(dev); err = copy_to_user((void *) arg, &rq, sizeof(rq)); |