linux-kernel - [patch] via: off by one issue

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Date:	Sun, 28 Mar 2010 14:19:47 +0300
From:	Dan Carpenter <error27@...il.com>
To:	David Airlie <airlied@...ux.ie>
Cc:	dri-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] via: off by one issue

"fx->lock" is used as the index in "dev_priv->decoder_queue[fx->lock]"
which is an array of "VIA_NR_XVMC_LOCKS" elements.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/drivers/gpu/drm/via/via_video.c b/drivers/gpu/drm/via/via_video.c
index 6ec04ac..6efac81 100644
--- a/drivers/gpu/drm/via/via_video.c
+++ b/drivers/gpu/drm/via/via_video.c
@@ -75,7 +75,7 @@ int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_
 
 	DRM_DEBUG("\n");
 
-	if (fx->lock > VIA_NR_XVMC_LOCKS)
+	if (fx->lock >= VIA_NR_XVMC_LOCKS)
 		return -EFAULT;
 
 	lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
--
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