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Merge branch 'rebased-net-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-01-24 23:48:11 -05:00
parent 955bd1d216 5c59e564e4
commit 8ec59b44a0
12 changed files with 173 additions and 399 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/inetdevice.h
View File

@ -173,7 +173,7 @@ static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
}
int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
void devinet_init(void);
struct in_device *inetdev_by_index(struct net *, int);
__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);

1
include/linux/net.h
View File

@ -306,7 +306,6 @@ int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags);
int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
size_t size, int flags);
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
/* Routine returns the IP overhead imposed by a (caller-protected) socket. */

7
include/linux/netdevice.h
View File

@ -2761,7 +2761,8 @@ static inline bool dev_validate_header(const struct net_device *dev,
return false;
}
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
int len, int size);
int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
static inline int unregister_gifconf(unsigned int family)
{
@ -3314,7 +3315,9 @@ int netdev_rx_handler_register(struct net_device *dev,
void netdev_rx_handler_unregister(struct net_device *dev);
bool dev_valid_name(const char *name);
int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
bool *need_copyout);
int dev_ifconf(struct net *net, struct ifconf *, int);
int dev_ethtool(struct net *net, struct ifreq *);
unsigned int dev_get_flags(const struct net_device *);
int __dev_change_flags(struct net_device *, unsigned int flags);

2
include/net/route.h
View File

@ -217,7 +217,7 @@ unsigned int inet_addr_type_dev_table(struct net *net,
const struct net_device *dev,
__be32 addr);
void ip_rt_multicast_event(struct in_device *);
int ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg);
int ip_rt_ioctl(struct net *, unsigned int cmd, struct rtentry *rt);
void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt);
struct rtable *rt_dst_alloc(struct net_device *dev,
unsigned int flags, u16 type,

4
include/net/wext.h
View File

@ -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;

132
net/core/dev_ioctl.c
View File

@ -18,26 +18,10 @@
* match. --pb
*/
static int dev_ifname(struct net *net, struct ifreq __user *arg)
static int dev_ifname(struct net *net, struct ifreq *ifr)
{
struct ifreq ifr;
int error;
/*
* Fetch the caller's info block.
*/
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
return -EFAULT;
ifr.ifr_name[IFNAMSIZ-1] = 0;
error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex);
if (error)
return error;
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
return -EFAULT;
return 0;
ifr->ifr_name[IFNAMSIZ-1] = 0;
return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
}
static gifconf_func_t *gifconf_list[NPROTO];
@ -66,9 +50,8 @@ EXPORT_SYMBOL(register_gifconf);
* Thus we will need a 'compatibility mode'.
*/
static int dev_ifconf(struct net *net, char __user *arg)
int dev_ifconf(struct net *net, struct ifconf *ifc, int size)
{
struct ifconf ifc;
struct net_device *dev;
char __user *pos;
int len;
@ -79,11 +62,8 @@ static int dev_ifconf(struct net *net, char __user *arg)
* Fetch the caller's info block.
*/
if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
return -EFAULT;
pos = ifc.ifc_buf;
len = ifc.ifc_len;
pos = ifc->ifc_buf;
len = ifc->ifc_len;
/*
* Loop over the interfaces, and write an info block for each.
@ -95,10 +75,10 @@ static int dev_ifconf(struct net *net, char __user *arg)
if (gifconf_list[i]) {
int done;
if (!pos)
done = gifconf_list[i](dev, NULL, 0);
done = gifconf_list[i](dev, NULL, 0, size);
else
done = gifconf_list[i](dev, pos + total,
len - total);
len - total, size);
if (done < 0)
return -EFAULT;
total += done;
@ -109,12 +89,12 @@ static int dev_ifconf(struct net *net, char __user *arg)
/*
* All done. Write the updated control block back to the caller.
*/
ifc.ifc_len = total;
ifc->ifc_len = total;
/*
* Both BSD and Solaris return 0 here, so we do too.
*/
return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
return 0;
}
/*
@ -406,53 +386,24 @@ EXPORT_SYMBOL(dev_load);
* positive or a negative errno code on error.
*/
int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout)
{
struct ifreq ifr;
int ret;
char *colon;
/* One special case: SIOCGIFCONF takes ifconf argument
and requires shared lock, because it sleeps writing
to user space.
*/
if (cmd == SIOCGIFCONF) {
rtnl_lock();
ret = dev_ifconf(net, (char __user *) arg);
rtnl_unlock();
return ret;
}
if (need_copyout)
*need_copyout = true;
if (cmd == SIOCGIFNAME)
return dev_ifname(net, (struct ifreq __user *)arg);
return dev_ifname(net, ifr);
/*
* 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;
ifr->ifr_name[IFNAMSIZ-1] = 0;
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;
ifr.ifr_name[IFNAMSIZ-1] = 0;
colon = strchr(ifr.ifr_name, ':');
colon = strchr(ifr->ifr_name, ':');
if (colon)
*colon = 0;
dev_load(net, ifr->ifr_name);
/*
* See which interface the caller is talking about.
*/
@ -472,31 +423,19 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
case SIOCGIFMAP:
case SIOCGIFINDEX:
case SIOCGIFTXQLEN:
dev_load(net, ifr.ifr_name);
rcu_read_lock();
ret = dev_ifsioc_locked(net, &ifr, cmd);
ret = dev_ifsioc_locked(net, ifr, cmd);
rcu_read_unlock();
if (!ret) {
if (colon)
*colon = ':';
if (copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
ret = -EFAULT;
}
if (colon)
*colon = ':';
return ret;
case SIOCETHTOOL:
dev_load(net, ifr.ifr_name);
rtnl_lock();
ret = dev_ethtool(net, &ifr);
ret = dev_ethtool(net, ifr);
rtnl_unlock();
if (!ret) {
if (colon)
*colon = ':';
if (copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
ret = -EFAULT;
}
if (colon)
*colon = ':';
return ret;
/*
@ -510,17 +449,11 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
case SIOCSIFNAME:
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
dev_load(net, ifr.ifr_name);
rtnl_lock();
ret = dev_ifsioc(net, &ifr, cmd);
ret = dev_ifsioc(net, ifr, cmd);
rtnl_unlock();
if (!ret) {
if (colon)
*colon = ':';
if (copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
ret = -EFAULT;
}
if (colon)
*colon = ':';
return ret;
/*
@ -561,10 +494,11 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
/* fall through */
case SIOCBONDSLAVEINFOQUERY:
case SIOCBONDINFOQUERY:
dev_load(net, ifr.ifr_name);
rtnl_lock();
ret = dev_ifsioc(net, &ifr, cmd);
ret = dev_ifsioc(net, ifr, cmd);
rtnl_unlock();
if (need_copyout)
*need_copyout = false;
return ret;
case SIOCGIFMEM:
@ -584,13 +518,9 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
cmd == SIOCGHWTSTAMP ||
(cmd >= SIOCDEVPRIVATE &&
cmd <= SIOCDEVPRIVATE + 15)) {
dev_load(net, ifr.ifr_name);
rtnl_lock();
ret = dev_ifsioc(net, &ifr, cmd);
ret = dev_ifsioc(net, ifr, cmd);
rtnl_unlock();
if (!ret && copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
ret = -EFAULT;
return ret;
}
return -ENOTTY;

28
net/ipv4/af_inet.c
View File

@ -872,6 +872,9 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
struct sock *sk = sock->sk;
int err = 0;
struct net *net = sock_net(sk);
void __user *p = (void __user *)arg;
struct ifreq ifr;
struct rtentry rt;
switch (cmd) {
case SIOCGSTAMP:
@ -882,8 +885,12 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
break;
case SIOCADDRT:
case SIOCDELRT:
if (copy_from_user(&rt, p, sizeof(struct rtentry)))
return -EFAULT;
err = ip_rt_ioctl(net, cmd, &rt);
break;
case SIOCRTMSG:
err = ip_rt_ioctl(net, cmd, (void __user *)arg);
err = -EINVAL;
break;
case SIOCDARP:
case SIOCGARP:
@ -891,17 +898,26 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
err = arp_ioctl(net, cmd, (void __user *)arg);
break;
case SIOCGIFADDR:
case SIOCSIFADDR:
case SIOCGIFBRDADDR:
case SIOCSIFBRDADDR:
case SIOCGIFNETMASK:
case SIOCSIFNETMASK:
case SIOCGIFDSTADDR:
case SIOCGIFPFLAGS:
if (copy_from_user(&ifr, p, sizeof(struct ifreq)))
return -EFAULT;
err = devinet_ioctl(net, cmd, &ifr);
if (!err && copy_to_user(p, &ifr, sizeof(struct ifreq)))
err = -EFAULT;
break;
case SIOCSIFADDR:
case SIOCSIFBRDADDR:
case SIOCSIFNETMASK:
case SIOCSIFDSTADDR:
case SIOCSIFPFLAGS:
case SIOCGIFPFLAGS:
case SIOCSIFFLAGS:
err = devinet_ioctl(net, cmd, (void __user *)arg);
if (copy_from_user(&ifr, p, sizeof(struct ifreq)))
return -EFAULT;
err = devinet_ioctl(net, cmd, &ifr);
break;
default:
if (sk->sk_prot->ioctl)

57
net/ipv4/devinet.c
View File

@ -946,11 +946,10 @@ static int inet_abc_len(__be32 addr)
}
int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
{
struct ifreq ifr;
struct sockaddr_in sin_orig;
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr;
struct in_device *in_dev;
struct in_ifaddr **ifap = NULL;
struct in_ifaddr *ifa = NULL;
@ -959,22 +958,16 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
int ret = -EFAULT;
int tryaddrmatch = 0;
/*
* Fetch the caller's info block into kernel space
*/
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
goto out;
ifr.ifr_name[IFNAMSIZ - 1] = 0;
ifr->ifr_name[IFNAMSIZ - 1] = 0;
/* save original address for comparison */
memcpy(&sin_orig, sin, sizeof(*sin));
colon = strchr(ifr.ifr_name, ':');
colon = strchr(ifr->ifr_name, ':');
if (colon)
*colon = 0;
dev_load(net, ifr.ifr_name);
dev_load(net, ifr->ifr_name);
switch (cmd) {
case SIOCGIFADDR: /* Get interface address */
@ -1014,7 +1007,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
rtnl_lock();
ret = -ENODEV;
dev = __dev_get_by_name(net, ifr.ifr_name);
dev = __dev_get_by_name(net, ifr->ifr_name);
if (!dev)
goto done;
@ -1031,7 +1024,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
This is checked above. */
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
ifap = &ifa->ifa_next) {
if (!strcmp(ifr.ifr_name, ifa->ifa_label) &&
if (!strcmp(ifr->ifr_name, ifa->ifa_label) &&
sin_orig.sin_addr.s_addr ==
ifa->ifa_local) {
break; /* found */
@ -1044,7 +1037,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (!ifa) {
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
ifap = &ifa->ifa_next)
if (!strcmp(ifr.ifr_name, ifa->ifa_label))
if (!strcmp(ifr->ifr_name, ifa->ifa_label))
break;
}
}
@ -1056,19 +1049,19 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
switch (cmd) {
case SIOCGIFADDR: /* Get interface address */
sin->sin_addr.s_addr = ifa->ifa_local;
goto rarok;
break;
case SIOCGIFBRDADDR: /* Get the broadcast address */
sin->sin_addr.s_addr = ifa->ifa_broadcast;
goto rarok;
break;
case SIOCGIFDSTADDR: /* Get the destination address */
sin->sin_addr.s_addr = ifa->ifa_address;
goto rarok;
break;
case SIOCGIFNETMASK: /* Get the netmask for the interface */
sin->sin_addr.s_addr = ifa->ifa_mask;
goto rarok;
break;
case SIOCSIFFLAGS:
if (colon) {
@ -1076,11 +1069,11 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (!ifa)
break;
ret = 0;
if (!(ifr.ifr_flags & IFF_UP))
if (!(ifr->ifr_flags & IFF_UP))
inet_del_ifa(in_dev, ifap, 1);
break;
}
ret = dev_change_flags(dev, ifr.ifr_flags);
ret = dev_change_flags(dev, ifr->ifr_flags);
break;
case SIOCSIFADDR: /* Set interface address (and family) */
@ -1095,7 +1088,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
break;
INIT_HLIST_NODE(&ifa->hash);
if (colon)
memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
memcpy(ifa->ifa_label, ifr->ifr_name, IFNAMSIZ);
else
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
} else {
@ -1182,28 +1175,27 @@ done:
rtnl_unlock();
out:
return ret;
rarok:
rtnl_unlock();
ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0;
goto out;
}
static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size)
{
struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct in_ifaddr *ifa;
struct ifreq ifr;
int done = 0;
if (WARN_ON(size > sizeof(struct ifreq)))
goto out;
if (!in_dev)
goto out;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
if (!buf) {
done += sizeof(ifr);
done += size;
continue;
}
if (len < (int) sizeof(ifr))
if (len < size)
break;
memset(&ifr, 0, sizeof(struct ifreq));
strcpy(ifr.ifr_name, ifa->ifa_label);
@ -1212,13 +1204,12 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
(*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr =
ifa->ifa_local;
if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) {
if (copy_to_user(buf + done, &ifr, size)) {
done = -EFAULT;
break;
}
buf += sizeof(struct ifreq);
len -= sizeof(struct ifreq);
done += sizeof(struct ifreq);
len -= size;
done += size;
}
out:
return done;

8
net/ipv4/fib_frontend.c
View File

@ -587,10 +587,9 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
* Handle IP routing ioctl calls.
* These are used to manipulate the routing tables
*/
int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
int ip_rt_ioctl(struct net *net, unsigned int cmd, struct rtentry *rt)
{
struct fib_config cfg;
struct rtentry rt;
int err;
switch (cmd) {
@ -599,11 +598,8 @@ int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&rt, arg, sizeof(rt)))
return -EFAULT;
rtnl_lock();
err = rtentry_to_fib_config(net, cmd, &rt, &cfg);
err = rtentry_to_fib_config(net, cmd, rt, &cfg);
if (err == 0) {
struct fib_table *tb;

47
net/ipv4/ipconfig.c
View File

@ -329,39 +329,6 @@ set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port)
sin->sin_port = port;
}
static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg)
{
int res;
mm_segment_t oldfs = get_fs();
set_fs(get_ds());
res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg);
set_fs(oldfs);
return res;
}
static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg)
{
int res;
mm_segment_t oldfs = get_fs();
set_fs(get_ds());
res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg);
set_fs(oldfs);
return res;
}
static int __init ic_route_ioctl(unsigned int cmd, struct rtentry *arg)
{
int res;
mm_segment_t oldfs = get_fs();
set_fs(get_ds());
res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg);
set_fs(oldfs);
return res;
}
/*
* Set up interface addresses and routes.
*/
@ -375,19 +342,19 @@ static int __init ic_setup_if(void)
memset(&ir, 0, sizeof(ir));
strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->dev->name);
set_sockaddr(sin, ic_myaddr, 0);
if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) {
if ((err = devinet_ioctl(&init_net, SIOCSIFADDR, &ir)) < 0) {
pr_err("IP-Config: Unable to set interface address (%d)\n",
err);
return -1;
}
set_sockaddr(sin, ic_netmask, 0);
if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) {
if ((err = devinet_ioctl(&init_net, SIOCSIFNETMASK, &ir)) < 0) {
pr_err("IP-Config: Unable to set interface netmask (%d)\n",
err);
return -1;
}
set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0);
if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) {
if ((err = devinet_ioctl(&init_net, SIOCSIFBRDADDR, &ir)) < 0) {
pr_err("IP-Config: Unable to set interface broadcast address (%d)\n",
err);
return -1;
@ -397,11 +364,11 @@ static int __init ic_setup_if(void)
* out, we'll try to muddle along.
*/
if (ic_dev_mtu != 0) {
strcpy(ir.ifr_name, ic_dev->dev->name);
ir.ifr_mtu = ic_dev_mtu;
if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0)
rtnl_lock();
if ((err = dev_set_mtu(ic_dev->dev, ic_dev_mtu)) < 0)
pr_err("IP-Config: Unable to set interface mtu to %d (%d)\n",
ic_dev_mtu, err);
rtnl_unlock();
}
return 0;
}
@ -423,7 +390,7 @@ static int __init ic_setup_routes(void)
set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0);
set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0);
rm.rt_flags = RTF_UP | RTF_GATEWAY;
if ((err = ic_route_ioctl(SIOCADDRT, &rm)) < 0) {
if ((err = ip_rt_ioctl(&init_net, SIOCADDRT, &rm)) < 0) {
pr_err("IP-Config: Cannot add default route (%d)\n",
err);
return -1;

271
net/socket.c
View File

@ -961,9 +961,28 @@ static long sock_do_ioctl(struct net *net, struct socket *sock,
* If this ioctl is unknown try to hand it down
* to the NIC driver.
*/
if (err == -ENOIOCTLCMD)
err = dev_ioctl(net, cmd, argp);
if (err != -ENOIOCTLCMD)
return err;
if (cmd == SIOCGIFCONF) {
struct ifconf ifc;
if (copy_from_user(&ifc, argp, sizeof(struct ifconf)))
return -EFAULT;
rtnl_lock();
err = dev_ifconf(net, &ifc, sizeof(struct ifreq));
rtnl_unlock();
if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf)))
err = -EFAULT;
} else {
struct ifreq ifr;
bool need_copyout;
if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
return -EFAULT;
err = dev_ioctl(net, cmd, &ifr, &need_copyout);
if (!err && need_copyout)
if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
return -EFAULT;
}
return err;
}
@ -988,12 +1007,19 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
sock = file->private_data;
sk = sock->sk;
net = sock_net(sk);
if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
err = dev_ioctl(net, cmd, argp);
if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) {
struct ifreq ifr;
bool need_copyout;
if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
return -EFAULT;
err = dev_ioctl(net, cmd, &ifr, &need_copyout);
if (!err && need_copyout)
if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
return -EFAULT;
} 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) {
@ -2654,89 +2680,25 @@ static int do_siocgstampns(struct net *net, struct socket *sock,
return err;
}
static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
{
struct ifreq __user *uifr;
int err;
uifr = compat_alloc_user_space(sizeof(struct ifreq));
if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
return -EFAULT;
err = dev_ioctl(net, SIOCGIFNAME, uifr);
if (err)
return err;
if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
return -EFAULT;
return 0;
}
static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
{
struct compat_ifconf ifc32;
struct ifconf ifc;
struct ifconf __user *uifc;
struct compat_ifreq __user *ifr32;
struct ifreq __user *ifr;
unsigned int i, j;
int err;
if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
return -EFAULT;
memset(&ifc, 0, sizeof(ifc));
if (ifc32.ifcbuf == 0) {
ifc32.ifc_len = 0;
ifc.ifc_len = 0;
ifc.ifc_req = NULL;
uifc = compat_alloc_user_space(sizeof(struct ifconf));
} else {
size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
sizeof(struct ifreq);
uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
ifc.ifc_len = len;
ifr = ifc.ifc_req = (void __user *)(uifc + 1);
ifr32 = compat_ptr(ifc32.ifcbuf);
for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
return -EFAULT;
ifr++;
ifr32++;
}
}
if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
return -EFAULT;
ifc.ifc_len = ifc32.ifc_len;
ifc.ifc_req = compat_ptr(ifc32.ifcbuf);
err = dev_ioctl(net, SIOCGIFCONF, uifc);
rtnl_lock();
err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq));
rtnl_unlock();
if (err)
return err;
if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
return -EFAULT;
ifr = ifc.ifc_req;
ifr32 = compat_ptr(ifc32.ifcbuf);
for (i = 0, j = 0;
i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
return -EFAULT;
ifr32++;
ifr++;
}
if (ifc32.ifcbuf == 0) {
/* Translate from 64-bit structure multiple to
* a 32-bit one.
*/
i = ifc.ifc_len;
i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
ifc32.ifc_len = i;
} else {
ifc32.ifc_len = i;
}
ifc32.ifc_len = ifc.ifc_len;
if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
return -EFAULT;
@ -2747,9 +2709,9 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
{
struct compat_ethtool_rxnfc __user *compat_rxnfc;
bool convert_in = false, convert_out = false;
size_t buf_size = ALIGN(sizeof(struct ifreq), 8);
struct ethtool_rxnfc __user *rxnfc;
struct ifreq __user *ifr;
size_t buf_size = 0;
struct ethtool_rxnfc __user *rxnfc = NULL;
struct ifreq ifr;
u32 rule_cnt = 0, actual_rule_cnt;
u32 ethcmd;
u32 data;
@ -2786,18 +2748,14 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
case ETHTOOL_SRXCLSRLDEL:
buf_size += sizeof(struct ethtool_rxnfc);
convert_in = true;
rxnfc = compat_alloc_user_space(buf_size);
break;
}
ifr = compat_alloc_user_space(buf_size);
rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8);
if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ))
return -EFAULT;
if (put_user(convert_in ? rxnfc : compat_ptr(data),
&ifr->ifr_ifru.ifru_data))
return -EFAULT;
ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc;
if (convert_in) {
/* We expect there to be holes between fs.m_ext and
@ -2825,7 +2783,7 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
return -EFAULT;
}
ret = dev_ioctl(net, SIOCETHTOOL, ifr);
ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL);
if (ret)
return ret;
@ -2866,113 +2824,43 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
{
void __user *uptr;
compat_uptr_t uptr32;
struct ifreq __user *uifr;
struct ifreq ifr;
void __user *saved;
int err;
uifr = compat_alloc_user_space(sizeof(*uifr));
if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq)))
return -EFAULT;
if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
return -EFAULT;
uptr = compat_ptr(uptr32);
saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc;
ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32);
if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
return -EFAULT;
return dev_ioctl(net, SIOCWANDEV, uifr);
}
static int bond_ioctl(struct net *net, unsigned int cmd,
struct compat_ifreq __user *ifr32)
{
struct ifreq kifr;
mm_segment_t old_fs;
int err;
switch (cmd) {
case SIOCBONDENSLAVE:
case SIOCBONDRELEASE:
case SIOCBONDSETHWADDR:
case SIOCBONDCHANGEACTIVE:
if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = dev_ioctl(net, cmd,
(struct ifreq __user __force *) &kifr);
set_fs(old_fs);
return err;
default:
return -ENOIOCTLCMD;
err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL);
if (!err) {
ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved;
if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq)))
err = -EFAULT;
}
return err;
}
/* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */
static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
struct compat_ifreq __user *u_ifreq32)
{
struct ifreq __user *u_ifreq64;
char tmp_buf[IFNAMSIZ];
void __user *data64;
struct ifreq ifreq;
u32 data32;
if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
IFNAMSIZ))
if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ))
return -EFAULT;
if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
if (get_user(data32, &u_ifreq32->ifr_data))
return -EFAULT;
data64 = compat_ptr(data32);
ifreq.ifr_data = compat_ptr(data32);
u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
IFNAMSIZ))
return -EFAULT;
if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
return -EFAULT;
return dev_ioctl(net, cmd, u_ifreq64);
}
static int dev_ifsioc(struct net *net, struct socket *sock,
unsigned int cmd, struct compat_ifreq __user *uifr32)
{
struct ifreq __user *uifr;
int err;
uifr = compat_alloc_user_space(sizeof(*uifr));
if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
return -EFAULT;
err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
if (!err) {
switch (cmd) {
case SIOCGIFFLAGS:
case SIOCGIFMETRIC:
case SIOCGIFMTU:
case SIOCGIFMEM:
case SIOCGIFHWADDR:
case SIOCGIFINDEX:
case SIOCGIFADDR:
case SIOCGIFBRDADDR:
case SIOCGIFDSTADDR:
case SIOCGIFNETMASK:
case SIOCGIFPFLAGS:
case SIOCGIFTXQLEN:
case SIOCGMIIPHY:
case SIOCGMIIREG:
if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
err = -EFAULT;
break;
}
}
return err;
return dev_ioctl(net, cmd, &ifreq, NULL);
}
static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
@ -2980,7 +2868,6 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
{
struct ifreq ifr;
struct compat_ifmap __user *uifmap32;
mm_segment_t old_fs;
int err;
uifmap32 = &uifr32->ifr_ifru.ifru_map;
@ -2994,10 +2881,7 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
if (err)
return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = dev_ioctl(net, cmd, (void __user __force *)&ifr);
set_fs(old_fs);
err = dev_ioctl(net, cmd, &ifr, NULL);
if (cmd == SIOCGIFMAP && !err) {
err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
@ -3130,10 +3014,8 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCSIFBR:
case SIOCGIFBR:
return old_bridge_ioctl(argp);
case SIOCGIFNAME:
return dev_ifname32(net, argp);
case SIOCGIFCONF:
return dev_ifconf(net, argp);
return compat_dev_ifconf(net, argp);
case SIOCETHTOOL:
return ethtool_ioctl(net, argp);
case SIOCWANDEV:
@ -3141,11 +3023,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCGIFMAP:
case SIOCSIFMAP:
return compat_sioc_ifmap(net, cmd, argp);
case SIOCBONDENSLAVE:
case SIOCBONDRELEASE:
case SIOCBONDSETHWADDR:
case SIOCBONDCHANGEACTIVE:
return bond_ioctl(net, cmd, argp);
case SIOCADDRT:
case SIOCDELRT:
return routing_ioctl(net, sock, cmd, argp);
@ -3205,12 +3082,15 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
return dev_ifsioc(net, sock, cmd, argp);
case SIOCSARP:
case SIOCGARP:
case SIOCDARP:
case SIOCATMARK:
case SIOCBONDENSLAVE:
case SIOCBONDRELEASE:
case SIOCBONDSETHWADDR:
case SIOCBONDCHANGEACTIVE:
case SIOCGIFNAME:
return sock_do_ioctl(net, sock, cmd, arg);
}
@ -3365,19 +3245,6 @@ int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
}
EXPORT_SYMBOL(kernel_sendpage_locked);
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
{
mm_segment_t oldfs = get_fs();
int err;
set_fs(KERNEL_DS);
err = sock->ops->ioctl(sock, cmd, arg);
set_fs(oldfs);
return err;
}
EXPORT_SYMBOL(kernel_sock_ioctl);
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
{
return sock->ops->shutdown(sock, how);

13
net/wireless/wext-core.c
View File

@ -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;