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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-10-01 20:13:08 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2018-01-24 19:13:45 -0500 |
| commit | b1b0c245067268043e0e832432f3d537a5cae33b (patch) | |
| tree | 7ded461ec00dc15af031544a1c5e8bbb3586902d | |
| parent | 4cf808e7ac32120b3db95d824acd52f586bfdd1d (diff) | |
| download | linux-b1b0c245067268043e0e832432f3d537a5cae33b.tar.gz linux-b1b0c245067268043e0e832432f3d537a5cae33b.tar.bz2 linux-b1b0c245067268043e0e832432f3d537a5cae33b.zip | |
lift handling of SIOCIW... out of dev_ioctl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | include/net/wext.h | 4 | ||||
| -rw-r--r-- | net/core/dev_ioctl.c | 18 | ||||
| -rw-r--r-- | net/socket.c | 2 | ||||
| -rw-r--r-- | net/wireless/wext-core.c | 13 |
4 files changed, 12 insertions, 25 deletions
diff --git a/include/net/wext.h b/include/net/wext.h index e51f067fdb3a..aa192a670304 100644 --- a/include/net/wext.h +++ b/include/net/wext.h @@ -7,7 +7,7 @@ struct net; #ifdef CONFIG_WEXT_CORE -int wext_handle_ioctl(struct net *net, struct iwreq *iwr, unsigned int cmd, +int wext_handle_ioctl(struct net *net, unsigned int cmd, void __user *arg); int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, unsigned long arg); @@ -15,7 +15,7 @@ int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, struct iw_statistics *get_wireless_stats(struct net_device *dev); int call_commit_handler(struct net_device *dev); #else -static inline int wext_handle_ioctl(struct net *net, struct iwreq *iwr, unsigned int cmd, +static inline int wext_handle_ioctl(struct net *net, unsigned int cmd, void __user *arg) { return -EINVAL; diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index 5cdec23dd28e..d262f159f9fd 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -411,24 +411,6 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) if (cmd == SIOCGIFNAME) return dev_ifname(net, (struct ifreq __user *)arg); - /* - * Take care of Wireless Extensions. Unfortunately struct iwreq - * isn't a proper subset of struct ifreq (it's 8 byte shorter) - * so we need to treat it specially, otherwise applications may - * fault if the struct they're passing happens to land at the - * end of a mapped page. - */ - if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { - struct iwreq iwr; - - if (copy_from_user(&iwr, arg, sizeof(iwr))) - return -EFAULT; - - iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; - - return wext_handle_ioctl(net, &iwr, cmd, arg); - } - if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) return -EFAULT; diff --git a/net/socket.c b/net/socket.c index 026271ff2853..1ad02d9edbef 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1005,7 +1005,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) } else #ifdef CONFIG_WEXT_CORE if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { - err = dev_ioctl(net, cmd, argp); + err = wext_handle_ioctl(net, cmd, argp); } else #endif switch (cmd) { diff --git a/net/wireless/wext-core.c b/net/wireless/wext-core.c index 6cdb054484d6..9efbfc753347 100644 --- a/net/wireless/wext-core.c +++ b/net/wireless/wext-core.c @@ -1035,18 +1035,23 @@ static int ioctl_standard_call(struct net_device * dev, } -int wext_handle_ioctl(struct net *net, struct iwreq *iwr, unsigned int cmd, - void __user *arg) +int wext_handle_ioctl(struct net *net, unsigned int cmd, void __user *arg) { struct iw_request_info info = { .cmd = cmd, .flags = 0 }; + struct iwreq iwr; int ret; - ret = wext_ioctl_dispatch(net, iwr, cmd, &info, + if (copy_from_user(&iwr, arg, sizeof(iwr))) + return -EFAULT; + + iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; + + ret = wext_ioctl_dispatch(net, &iwr, cmd, &info, ioctl_standard_call, ioctl_private_call); if (ret >= 0 && IW_IS_GET(cmd) && - copy_to_user(arg, iwr, sizeof(struct iwreq))) + copy_to_user(arg, &iwr, sizeof(struct iwreq))) return -EFAULT; return ret; |