isdn: off by one in connect_res()

The bug here is that we use "Reject" as the index into the cau_t[] array
in the else path.  Since the cau_t[] has 9 elements if Reject == 9 then
we are reading beyond the end of the array.

My understanding of the code is that it's saying that if Reject is 1 or
too high then that's invalid and we should hang up.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/isdn/hardware/eicon/message.c b/drivers/isdn/hardware/eicon/message.c
index 0b380603a578543bcd275d248ade94f3f07b24a8..d7c286656a25721ec58fa16a5f3fdb277a0747a5 100644 (file)
--- a/drivers/isdn/hardware/eicon/message.c
+++ b/drivers/isdn/hardware/eicon/message.c
@@ -1474,7 +1474,7 @@ static byte connect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
                                        add_ai(plci, &parms[5]);
                                        sig_req(plci, REJECT, 0);
                                }
-                               else if (Reject == 1 || Reject > 9)
+                               else if (Reject == 1 || Reject >= 9)
                                {
                                        add_ai(plci, &parms[5]);
                                        sig_req(plci, HANGUP, 0);