net, compat_ioctl: handle socket ioctl abuses in tty drivers
Slip and a few other drivers use the same ioctl numbers on
tty devices that are normally meant for sockets. This causes
problems with our compat_ioctl handling that tries to convert
the data structures in a different format.
Fortunately, these five drivers all use 32 bit compatible
data structures in the ioctl numbers, so we can just add
a trivial compat_ioctl conversion function to each of them.
SIOCSIFENCAP and SIOCGIFENCAP do not need to live in
fs/compat_ioctl.c after this any more, and they are not
used on any sockets.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index fb58830..689b9bd 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -34,6 +34,7 @@
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/semaphore.h>
+#include <linux/compat.h>
#include <asm/atomic.h>
#define SIXPACK_VERSION "Revision: 0.3.0"
@@ -777,6 +778,23 @@
return err;
}
+#ifdef CONFIG_COMPAT
+static long sixpack_compat_ioctl(struct tty_struct * tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCGIFNAME:
+ case SIOCGIFENCAP:
+ case SIOCSIFENCAP:
+ case SIOCSIFHWADDR:
+ return sixpack_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+
+ return -ENOIOCTLCMD;
+}
+#endif
+
static struct tty_ldisc_ops sp_ldisc = {
.owner = THIS_MODULE,
.magic = TTY_LDISC_MAGIC,
@@ -784,6 +802,9 @@
.open = sixpack_open,
.close = sixpack_close,
.ioctl = sixpack_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = sixpack_compat_ioctl,
+#endif
.receive_buf = sixpack_receive_buf,
.write_wakeup = sixpack_write_wakeup,
};
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index db4b7f1..fc9c578 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -36,6 +36,7 @@
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/jiffies.h>
+#include <linux/compat.h>
#include <net/ax25.h>
@@ -898,6 +899,23 @@
return err;
}
+#ifdef CONFIG_COMPAT
+static long mkiss_compat_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (arg) {
+ case SIOCGIFNAME:
+ case SIOCGIFENCAP:
+ case SIOCSIFENCAP:
+ case SIOCSIFHWADDR:
+ return mkiss_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+
+ return -ENOIOCTLCMD;
+}
+#endif
+
/*
* Handle the 'receiver data ready' interrupt.
* This function is called by the 'tty_io' module in the kernel when
@@ -972,6 +990,9 @@
.open = mkiss_open,
.close = mkiss_close,
.ioctl = mkiss_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = mkiss_compat_ioctl,
+#endif
.receive_buf = mkiss_receive_buf,
.write_wakeup = mkiss_write_wakeup
};
diff --git a/drivers/net/slip.c b/drivers/net/slip.c
index e17c535..ccfe459 100644
--- a/drivers/net/slip.c
+++ b/drivers/net/slip.c
@@ -79,6 +79,7 @@
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
#include <linux/if_slip.h>
+#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/init.h>
#include "slip.h"
@@ -1168,6 +1169,27 @@
}
}
+#ifdef CONFIG_COMPAT
+static long slip_compat_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCGIFNAME:
+ case SIOCGIFENCAP:
+ case SIOCSIFENCAP:
+ case SIOCSIFHWADDR:
+ case SIOCSKEEPALIVE:
+ case SIOCGKEEPALIVE:
+ case SIOCSOUTFILL:
+ case SIOCGOUTFILL:
+ return slip_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+
+ return -ENOIOCTLCMD;
+}
+#endif
+
/* VSV changes start here */
#ifdef CONFIG_SLIP_SMART
/* function do_ioctl called from net/core/dev.c
@@ -1260,6 +1282,9 @@
.close = slip_close,
.hangup = slip_hangup,
.ioctl = slip_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = slip_compat_ioctl,
+#endif
.receive_buf = slip_receive_buf,
.write_wakeup = slip_write_wakeup,
};
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 2794504..3c325d7 100644
--- 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 @@
}
}
+#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 @@
.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,
};
diff --git a/drivers/net/wireless/strip.c b/drivers/net/wireless/strip.c
index ea6a87c..698aade 100644
--- a/drivers/net/wireless/strip.c
+++ b/drivers/net/wireless/strip.c
@@ -106,6 +106,7 @@
#include <linux/serial.h>
#include <linux/serialP.h>
#include <linux/rcupdate.h>
+#include <linux/compat.h>
#include <net/arp.h>
#include <net/net_namespace.h>
@@ -2725,6 +2726,19 @@
return 0;
}
+#ifdef CONFIG_COMPAT
+static long strip_compat_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCGIFNAME:
+ case SIOCSIFHWADDR:
+ return strip_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+ return -ENOIOCTLCMD;
+}
+#endif
/************************************************************************/
/* Initialization */
@@ -2736,6 +2750,9 @@
.open = strip_open,
.close = strip_close,
.ioctl = strip_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = strip_compat_ioctl,
+#endif
.receive_buf = strip_receive_buf,
.write_wakeup = strip_write_some_more,
};
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index c562e9a..f4a5a01 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -2020,8 +2020,6 @@
COMPATIBLE_IOCTL(SIOCGPGRP)
COMPATIBLE_IOCTL(SIOCATMARK)
COMPATIBLE_IOCTL(SIOCSIFLINK)
-COMPATIBLE_IOCTL(SIOCSIFENCAP)
-COMPATIBLE_IOCTL(SIOCGIFENCAP)
COMPATIBLE_IOCTL(SIOCSIFNAME)
COMPATIBLE_IOCTL(SIOCSARP)
COMPATIBLE_IOCTL(SIOCGARP)
