net, compat_ioctl: handle socket ioctl abuses in tty drivers

[safe/jmp/linux-2.6] / drivers / net / wan / x25_asy.c

diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 2794504..3c325d7 100644 (file)
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -33,6 +33,7 @@
 #include <linux/lapb.h>
 #include <linux/init.h>
 #include <linux/rtnetlink.h>
+#include <linux/compat.h>
 #include "x25_asy.h"
 
 #include <net/x25device.h>
@@ -705,6 +706,21 @@ static int x25_asy_ioctl(struct tty_struct *tty, struct file *file,
        }
 }
 
+#ifdef CONFIG_COMPAT
+static long x25_asy_compat_ioctl(struct tty_struct *tty, struct file *file,
+                        unsigned int cmd,  unsigned long arg)
+{
+       switch (cmd) {
+       case SIOCGIFNAME:
+       case SIOCSIFHWADDR:
+               return x25_asy_ioctl(tty, file, cmd,
+                                    (unsigned long)compat_ptr(arg));
+       }
+
+       return -ENOIOCTLCMD;
+}
+#endif
+
 static int x25_asy_open_dev(struct net_device *dev)
 {
        struct x25_asy *sl = netdev_priv(dev);
@@ -754,6 +770,9 @@ static struct tty_ldisc_ops x25_ldisc = {
        .open           = x25_asy_open_tty,
        .close          = x25_asy_close_tty,
        .ioctl          = x25_asy_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = x25_asy_compat_ioctl,
+#endif
        .receive_buf    = x25_asy_receive_buf,
        .write_wakeup   = x25_asy_write_wakeup,
 };