linux-kernel - [PATCH] newport_con: Read outside array bounds

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Date:	Wed, 29 Jul 2009 21:20:45 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] newport_con: Read outside array bounds

It read linetable[] before checking bounds of index, and ARRAY_SIZE
is required because linetable[] are unsigned shorts.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
This one wasn't spotted by parfait.

diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c
index d31b203..3772433 100644
--- a/drivers/video/console/newport_con.c
+++ b/drivers/video/console/newport_con.c
@@ -216,7 +216,7 @@ static void newport_get_screensize(void)
 	}
 
 	newport_xsize = newport_ysize = 0;
-	for (i = 0; linetable[i + 1] && (i < sizeof(linetable)); i += 2) {
+	for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
 		cols = 0;
 		newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 		npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
--
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