From 06a5bd6224d180ce580318ca2c248094eb69a537 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sun, 1 Feb 2015 23:54:25 +0300
Subject: [PATCH] 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>
---
drivers/isdn/hardware/eicon/message.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/isdn/hardware/eicon/message.c b/drivers/isdn/hardware/eicon/message.c
index 0b380603a5785..d7c286656a257 100644
--- 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);
--
2.39.5