[PATCH 10/9] raw_sendmsg DoS (CAN-2005-2492)

[Chris Wright <chrisw@osdl.org>]

I missed this one when launching review cycle, thanks to Mark Cox for
catching oversight.

-stable review patch.  If anyone has any  objections, please let us know.
------------------

From: Al Viro <aviro@redhat.com>

Fix unchecked __get_user that could be tricked into generating a
memory read on an arbitrary address.  The result of the read is not
returned directly but you may be able to divine some information about
it, or use the read to cause a crash on some architectures by reading
hardware state.  CAN-2005-2492.

Fix from Al Viro, ack from Dave Miller.

Signed-off-by: Chris Wright <chrisw@osdl.org>
---
 net/ipv4/raw.c |    2 +-
 net/ipv6/raw.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.13.y/net/ipv4/raw.c
===================================================================
--- linux-2.6.13.y.orig/net/ipv4/raw.c
+++ linux-2.6.13.y/net/ipv4/raw.c
@@ -358,7 +358,7 @@ static void raw_probe_proto_opt(struct f
 
 			if (type && code) {
 				get_user(fl->fl_icmp_type, type);
-				__get_user(fl->fl_icmp_code, code);
+			        get_user(fl->fl_icmp_code, code);
 				probed = 1;
 			}
 			break;
Index: linux-2.6.13.y/net/ipv6/raw.c
===================================================================
--- linux-2.6.13.y.orig/net/ipv6/raw.c
+++ linux-2.6.13.y/net/ipv6/raw.c
@@ -619,7 +619,7 @@ static void rawv6_probe_proto_opt(struct
 
 			if (type && code) {
 				get_user(fl->fl_icmp_type, type);
-				__get_user(fl->fl_icmp_code, code);
+				get_user(fl->fl_icmp_code, code);
 				probed = 1;
 			}
 			break;