linux-kernel - [PATCH] sms-cards.c: Ensure index is positive

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Date:	Mon, 02 Nov 2009 17:26:31 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] sms-cards.c: Ensure index is positive

The index is signed, make sure it is not negative
when we read the array element.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
 drivers/media/dvb/siano/sms-cards.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/dvb/siano/sms-cards.c b/drivers/media/dvb/siano/sms-cards.c
index 0420e28..52f0dac 100644
--- a/drivers/media/dvb/siano/sms-cards.c
+++ b/drivers/media/dvb/siano/sms-cards.c
@@ -99,7 +99,7 @@ static struct sms_board sms_boards[] = {
 
 struct sms_board *sms_get_board(int id)
 {
-	BUG_ON(id >= ARRAY_SIZE(sms_boards));
+	BUG_ON(id >= ARRAY_SIZE(sms_boards) || id < 0);
 
 	return &sms_boards[id];
 }
--
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