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-rw-r--r--include/linux/netdevice.h2
-rw-r--r--net/appletalk/ddp.c4
-rw-r--r--net/ieee802154/socket.c4
-rw-r--r--net/ipv4/af_inet.c6
-rw-r--r--net/qrtr/qrtr.c4
-rw-r--r--net/socket.c103
6 files changed, 76 insertions, 47 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index da2c273c7e0a..c871dc223dfa 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4006,6 +4006,8 @@ 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 get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg);
+int put_user_ifreq(struct ifreq *ifr, void __user *arg);
int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
bool *need_copyout);
int dev_ifconf(struct net *net, struct ifconf __user *ifc);
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 8ade5a4ceaf5..bf5736c1d458 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -666,7 +666,7 @@ static int atif_ioctl(int cmd, void __user *arg)
struct rtentry rtdef;
int add_route;
- if (copy_from_user(&atreq, arg, sizeof(atreq)))
+ if (get_user_ifreq(&atreq, NULL, arg))
return -EFAULT;
dev = __dev_get_by_name(&init_net, atreq.ifr_name);
@@ -865,7 +865,7 @@ static int atif_ioctl(int cmd, void __user *arg)
return 0;
}
- return copy_to_user(arg, &atreq, sizeof(atreq)) ? -EFAULT : 0;
+ return put_user_ifreq(&atreq, arg);
}
static int atrtr_ioctl_addrt(struct rtentry *rt)
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index a45a0401adc5..f5077de3619e 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -129,7 +129,7 @@ static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
int ret = -ENOIOCTLCMD;
struct net_device *dev;
- if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+ if (get_user_ifreq(&ifr, NULL, arg))
return -EFAULT;
ifr.ifr_name[IFNAMSIZ-1] = 0;
@@ -143,7 +143,7 @@ static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
- if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ if (!ret && put_user_ifreq(&ifr, arg))
ret = -EFAULT;
dev_put(dev);
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 54648181dd56..0e4d758c2585 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -953,10 +953,10 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
case SIOCGIFNETMASK:
case SIOCGIFDSTADDR:
case SIOCGIFPFLAGS:
- if (copy_from_user(&ifr, p, sizeof(struct ifreq)))
+ if (get_user_ifreq(&ifr, NULL, p))
return -EFAULT;
err = devinet_ioctl(net, cmd, &ifr);
- if (!err && copy_to_user(p, &ifr, sizeof(struct ifreq)))
+ if (!err && put_user_ifreq(&ifr, p))
err = -EFAULT;
break;
@@ -966,7 +966,7 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
case SIOCSIFDSTADDR:
case SIOCSIFPFLAGS:
case SIOCSIFFLAGS:
- if (copy_from_user(&ifr, p, sizeof(struct ifreq)))
+ if (get_user_ifreq(&ifr, NULL, p))
return -EFAULT;
err = devinet_ioctl(net, cmd, &ifr);
break;
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index e6f4a6202f82..e71847877248 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -1153,14 +1153,14 @@ static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
rc = put_user(len, (int __user *)argp);
break;
case SIOCGIFADDR:
- if (copy_from_user(&ifr, argp, sizeof(ifr))) {
+ if (get_user_ifreq(&ifr, NULL, argp)) {
rc = -EFAULT;
break;
}
sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
*sq = ipc->us;
- if (copy_to_user(argp, &ifr, sizeof(ifr))) {
+ if (put_user_ifreq(&ifr, argp)) {
rc = -EFAULT;
break;
}
diff --git a/net/socket.c b/net/socket.c
index ecdb7913a3bd..84de89c1ee9d 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3121,6 +3121,54 @@ void socket_seq_show(struct seq_file *seq)
}
#endif /* CONFIG_PROC_FS */
+/* Handle the fact that while struct ifreq has the same *layout* on
+ * 32/64 for everything but ifreq::ifru_ifmap and ifreq::ifru_data,
+ * which are handled elsewhere, it still has different *size* due to
+ * ifreq::ifru_ifmap (which is 16 bytes on 32 bit, 24 bytes on 64-bit,
+ * resulting in struct ifreq being 32 and 40 bytes respectively).
+ * As a result, if the struct happens to be at the end of a page and
+ * the next page isn't readable/writable, we get a fault. To prevent
+ * that, copy back and forth to the full size.
+ */
+int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg)
+{
+ if (in_compat_syscall()) {
+ struct compat_ifreq *ifr32 = (struct compat_ifreq *)ifr;
+
+ memset(ifr, 0, sizeof(*ifr));
+ if (copy_from_user(ifr32, arg, sizeof(*ifr32)))
+ return -EFAULT;
+
+ if (ifrdata)
+ *ifrdata = compat_ptr(ifr32->ifr_data);
+
+ return 0;
+ }
+
+ if (copy_from_user(ifr, arg, sizeof(*ifr)))
+ return -EFAULT;
+
+ if (ifrdata)
+ *ifrdata = ifr->ifr_data;
+
+ return 0;
+}
+EXPORT_SYMBOL(get_user_ifreq);
+
+int put_user_ifreq(struct ifreq *ifr, void __user *arg)
+{
+ size_t size = sizeof(*ifr);
+
+ if (in_compat_syscall())
+ size = sizeof(struct compat_ifreq);
+
+ if (copy_to_user(arg, ifr, size))
+ return -EFAULT;
+
+ return 0;
+}
+EXPORT_SYMBOL(put_user_ifreq);
+
#ifdef CONFIG_COMPAT
static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
{
@@ -3129,7 +3177,7 @@ static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32
void __user *saved;
int err;
- if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq)))
+ if (get_user_ifreq(&ifr, NULL, uifr32))
return -EFAULT;
if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
@@ -3141,7 +3189,7 @@ static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32
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)))
+ if (put_user_ifreq(&ifr, uifr32))
err = -EFAULT;
}
return err;
@@ -3165,49 +3213,28 @@ static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
static int compat_ifreq_ioctl(struct net *net, struct socket *sock,
unsigned int cmd,
+ unsigned long arg,
struct compat_ifreq __user *uifr32)
{
- struct ifreq __user *uifr;
+ struct ifreq ifr;
+ bool need_copyout;
int err;
- /* Handle the fact that while struct ifreq has the same *layout* on
- * 32/64 for everything but ifreq::ifru_ifmap and ifreq::ifru_data,
- * which are handled elsewhere, it still has different *size* due to
- * ifreq::ifru_ifmap (which is 16 bytes on 32 bit, 24 bytes on 64-bit,
- * resulting in struct ifreq being 32 and 40 bytes respectively).
- * As a result, if the struct happens to be at the end of a page and
- * the next page isn't readable/writable, we get a fault. To prevent
- * that, copy back and forth to the full size.
+ err = sock->ops->ioctl(sock, cmd, arg);
+
+ /* If this ioctl is unknown try to hand it down
+ * to the NIC driver.
*/
+ if (err != -ENOIOCTLCMD)
+ return err;
- uifr = compat_alloc_user_space(sizeof(*uifr));
- if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
+ if (get_user_ifreq(&ifr, NULL, uifr32))
return -EFAULT;
+ err = dev_ioctl(net, cmd, &ifr, &need_copyout);
+ if (!err && need_copyout)
+ if (put_user_ifreq(&ifr, 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:
- case SIOCGIFNAME:
- if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
- err = -EFAULT;
- break;
- }
- }
return err;
}
@@ -3310,7 +3337,7 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCBONDRELEASE:
case SIOCBONDSETHWADDR:
case SIOCBONDCHANGEACTIVE:
- return compat_ifreq_ioctl(net, sock, cmd, argp);
+ return compat_ifreq_ioctl(net, sock, cmd, arg, argp);
case SIOCSARP:
case SIOCGARP:
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 16:03:51 +0000