linux-kernel - [PATCH 4.4 24/56] drm/vmwgfx: Fix a buffer object leak

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Message-Id: <20180514064757.216460871@linuxfoundation.org>
Date:   Mon, 14 May 2018 08:48:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Hellstrom <thellstrom@...are.com>,
        Deepak Rawat <drawat@...are.com>,
        Sinclair Yeh <syeh@...are.com>
Subject: [PATCH 4.4 24/56] drm/vmwgfx: Fix a buffer object leak

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Hellstrom <thellstrom@...are.com>

commit 13f149d47392782baafd96d54d4e65f3b5ca342f upstream.

A buffer object leak was introduced when fixing a premature buffer
object release. Fix this.

Cc: <stable@...r.kernel.org>
Fixes: 73a88250b709 ("Fix a destoy-while-held mutex problem.")
Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Reviewed-by: Deepak Rawat <drawat@...are.com>
Reviewed-by: Sinclair Yeh <syeh@...are.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1991,6 +1991,7 @@ void vmw_kms_helper_resource_finish(stru
 		vmw_kms_helper_buffer_finish(res->dev_priv, NULL, ctx->buf,
 					     out_fence, NULL);
 
+	vmw_dmabuf_unreference(&ctx->buf);
 	vmw_resource_unreserve(res, false, NULL, 0);
 	mutex_unlock(&res->dev_priv->cmdbuf_mutex);
 }