Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU

commit 23bc6ab0a0912146fd674a0becc758c3162baabc upstream.

When we retrieve imtu value from userspace we should use 16 bit pointer
cast instead of 32 as it's defined that way in headers. Fixes setsockopt
calls on big-endian platforms.

Signed-off-by: Amadeusz SÅ\82awiÅ\84ski <amadeusz.slawinski@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 5f36f70ce44d3f8607735b85c19cfa0655b617e7..4b966c6c0145c993b3286b959e8ce3227bacacd6 100644 (file)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -725,7 +725,7 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
                        break;
                }
 
-               if (get_user(opt, (u32 __user *) optval)) {
+               if (get_user(opt, (u16 __user *) optval)) {
                        err = -EFAULT;
                        break;
                }