linux-kernel - [PATCH][drm-next] drm/virtio: fix memory leak of vfpriv on error return path

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Message-Id: <20181107203122.6861-1-colin.king@canonical.com>
Date:   Wed,  7 Nov 2018 20:31:22 +0000
From:   Colin King <colin.king@...onical.com>
To:     David Airlie <airlied@...ux.ie>, Gerd Hoffmann <kraxel@...hat.com>,
        dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][drm-next] drm/virtio: fix memory leak of vfpriv on error return path

From: Colin Ian King <colin.king@...onical.com>

The allocation for vfpriv is being leaked on an error return path,
fix this by kfree'ing it before returning.

Detected by CoverityScan, CID#1475380 ("Resource Leak")

Fixes: 6a37c49a94a9 ("drm/virtio: Handle context ID allocation errors")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/gpu/drm/virtio/virtgpu_kms.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index bf609dcae224..f4f995639ed1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -266,8 +266,10 @@ int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file)
 
 	get_task_comm(dbgname, current);
 	id = virtio_gpu_context_create(vgdev, strlen(dbgname), dbgname);
-	if (id < 0)
+	if (id < 0) {
+		kfree(vfpriv);
 		return id;
+	}
 
 	vfpriv->ctx_id = id;
 	file->driver_priv = vfpriv;
-- 
2.19.1