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isdn: off by one in connect_res()

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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>
This commit is contained in:
Dan Carpenter 2015-02-01 23:54:25 +03:00 committed by David S. Miller
parent 3ae55826ae
commit c101cff901
1 changed files with 1 additions and 1 deletions
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2
drivers/isdn/hardware/eicon/message.c
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@ -1474,7 +1474,7 @@ static byte connect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
add_ai(plci, &parms[5]); add_ai(plci, &parms[5]);
sig_req(plci, REJECT, 0); sig_req(plci, REJECT, 0);
} }
else if (Reject == 1 || Reject > 9) else if (Reject == 1 || Reject >= 9)
{ {
add_ai(plci, &parms[5]); add_ai(plci, &parms[5]);
sig_req(plci, HANGUP, 0); sig_req(plci, HANGUP, 0);