[PATCH] gigaset: correct range checking off by one error

Tilman Schmidt <[email protected]>
Newsgroups gmane.linux.kernel,gmane.linux.isdn.i4l.user,gmane.linux.isdn.i4l.devel,gmane.linux.network
Message-ID <[email protected]>
Correct a potential array overrun due to an off by one error in the
range check on the CAPI CONNECT_REQ CIPValue parameter.
Found and reported by Dan Carpenter using smatch.

Impact: bugfix
Signed-off-by: Tilman Schmidt <[email protected]>
---
 drivers/isdn/gigaset/capi.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
index 4a31962..0220c19 100644
--- a/drivers/isdn/gigaset/capi.c
+++ b/drivers/isdn/gigaset/capi.c
@@ -1301,7 +1301,7 @@ static void do_connect_req(struct gigaset_capi_ctr *iif,
 	}
 
 	/* check parameter: CIP Value */
-	if (cmsg->CIPValue > ARRAY_SIZE(cip2bchlc) ||
+	if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
 	    (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
 		dev_notice(cs->dev, "%s: unknown CIP value %d\n",
 			   "CONNECT_REQ", cmsg->CIPValue);
-- 
1.6.5.3.298.g39add
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.