[NET]: Fix ipx/econet/appletalk/irda ioctl crashes

Fix kernel oopses whenever somebody issues compatible ioctl on AppleTalk,
Econet, IPX or IRDA socket.  For AppleTalk/Econet/IRDA it restores state
in which these sockets were before compat_ioctl was introduced to the socket
ops, for IPX it implements support for 4 ioctls which were not implemented
before - as these ioctls use structures which match between 32bit and 64bit
userspace, no special code is needed, just call 64bit ioctl handler.

Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 25 insertions, 0 deletions

diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 627b11342233..2f37c9f35e27 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -1830,6 +1830,19 @@ static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
         return 0;
 }
 
+#ifdef CONFIG_COMPAT
+/*
+ * Function irda_ioctl (sock, cmd, arg)
+ */
+static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+        /*
+         * All IRDA's ioctl are standard ones.
+         */
+        return -ENOIOCTLCMD;
+}
+#endif
+
 /*
  * Function irda_setsockopt (sock, level, optname, optval, optlen)
  *
@@ -2476,6 +2489,9 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
         .getname =      irda_getname,
         .poll =         irda_poll,
         .ioctl =        irda_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = irda_compat_ioctl,
+#endif
         .listen =       irda_listen,
         .shutdown =     irda_shutdown,
         .setsockopt =   irda_setsockopt,
@@ -2497,6 +2513,9 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
         .getname =      irda_getname,
         .poll =         datagram_poll,
         .ioctl =        irda_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = irda_compat_ioctl,
+#endif
         .listen =       irda_listen,
         .shutdown =     irda_shutdown,
         .setsockopt =   irda_setsockopt,
@@ -2518,6 +2537,9 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
         .getname =      irda_getname,
         .poll =         datagram_poll,
         .ioctl =        irda_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = irda_compat_ioctl,
+#endif
         .listen =       irda_listen,
         .shutdown =     irda_shutdown,
         .setsockopt =   irda_setsockopt,
@@ -2540,6 +2562,9 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
         .getname =      irda_getname,
         .poll =         datagram_poll,
         .ioctl =        irda_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = irda_compat_ioctl,
+#endif
         .listen =       sock_no_listen,
         .shutdown =     irda_shutdown,
         .setsockopt =   irda_setsockopt,