linux-kernel - [PATCH] powerpc: Read buffer overflow

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Date:	Mon, 03 Aug 2009 13:48:34 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Bernd Petrovitsch <bernd@...mix.at>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] powerpc: Read buffer overflow

Check whether index is within bounds before grabbing the element.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 2989056..793b236 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -1230,11 +1230,12 @@ static struct tty_driver *hvsi_console_device(struct console *console,
 
 static int __init hvsi_console_setup(struct console *console, char *options)
 {
-	struct hvsi_struct *hp = &hvsi_ports[console->index];
+	struct hvsi_struct *hp;
 	int ret;
 
 	if (console->index < 0 || console->index >= hvsi_count)
 		return -1;
+	hp = &hvsi_ports[console->index];
 
 	/* give the FSP a chance to change the baud rate when we re-open */
 	hvsi_close_protocol(hp);
--
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