linux-kernel - [PATCH] rio: fix array checking

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Date:	Mon, 16 Oct 2006 16:28:44 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	torvalds@...l.org, akpm@...l.org, linux-kernel@...r.kernel.org
Subject: [PATCH] rio: fix array checking

Found by an analysis tool and reported to the list. Fix is simple enough

Signed-off-by: Alan Cox <alan@...hat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc1-mm1/drivers/char/rio/rioctrl.c linux-2.6.19-rc1-mm1/drivers/char/rio/rioctrl.c
--- linux.vanilla-2.6.19-rc1-mm1/drivers/char/rio/rioctrl.c	2006-10-13 15:06:33.000000000 +0100
+++ linux-2.6.19-rc1-mm1/drivers/char/rio/rioctrl.c	2006-10-14 18:55:37.000000000 +0100
@@ -662,7 +662,7 @@
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
-		if (portStats.port >= RIO_PORTS) {
+		if (portStats.port < 0 || portStats.port >= RIO_PORTS) {
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
 			return -ENXIO;
 		}
@@ -702,7 +702,7 @@
 			p->RIOError.Error = COPYIN_FAILED;
 			return -EFAULT;
 		}
-		if (portStats.port >= RIO_PORTS) {
+		if (portStats.port < 0 || portStats.port >= RIO_PORTS) {
 			p->RIOError.Error = PORT_NUMBER_OUT_OF_RANGE;
 			return -ENXIO;
 		}

-
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