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From: Dan Carpenter <error27@gmail.com>
To: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] via: off by one issue
Date: Sun, 28 Mar 2010 11:19:47 +0000	[thread overview]
Message-ID: <20100328111947.GH5069@bicker> (raw)

"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@gmail.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);

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <error27@gmail.com>
To: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] via: off by one issue
Date: Sun, 28 Mar 2010 14:19:47 +0300	[thread overview]
Message-ID: <20100328111947.GH5069@bicker> (raw)

"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@gmail.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);

             reply	other threads:[~2010-03-28 11:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-28 11:19 Dan Carpenter [this message]
2010-03-28 11:19 ` [patch] via: off by one issue Dan Carpenter

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