diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/wext.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/net/wireless/wext.c b/net/wireless/wext.c index a1cd19add6d8..e96559ea0fb3 100644 --- a/net/wireless/wext.c +++ b/net/wireless/wext.c @@ -1061,18 +1061,26 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, unsigned i return -EOPNOTSUPP; } +/* If command is `set a parameter', or `get the encoding parameters', + * check if the user has the right to do it. + */ +static int wext_permission_check(unsigned int cmd) +{ + if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT) + && !capable(CAP_NET_ADMIN)) + return -EPERM; + + return 0; +} + /* entry point from dev ioctl */ int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, void __user *arg) { - int ret; + int ret = wext_permission_check(cmd); - /* If command is `set a parameter', or - * `get the encoding parameters', check if - * the user has the right to do it */ - if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT) - && !capable(CAP_NET_ADMIN)) - return -EPERM; + if (ret) + return ret; dev_load(net, ifr->ifr_name); rtnl_lock(); |