[Qemu-devel] [PULL 4/5] virtio-gpu-3d: fix memory leak in resource attach backing

[Gerd Hoffmann <kraxel@redhat.com>]

From: Li Qiang <liq3ea@gmail.com>

If the virgl_renderer_resource_attach_iov function fails the
'res_iovs' will be leaked. Add check of the return value to
free the 'res_iovs' when failing.

Signed-off-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 1482999086-59795-1-git-send-email-liq3ea@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/virtio-gpu-3d.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hw/display/virtio-gpu-3d.c b/hw/display/virtio-gpu-3d.c
index e29f099..b13ced3 100644
--- a/hw/display/virtio-gpu-3d.c
+++ b/hw/display/virtio-gpu-3d.c
@@ -291,8 +291,11 @@ static void virgl_resource_attach_backing(VirtIOGPU *g,
         return;
     }
 
-    virgl_renderer_resource_attach_iov(att_rb.resource_id,
-                                       res_iovs, att_rb.nr_entries);
+    ret = virgl_renderer_resource_attach_iov(att_rb.resource_id,
+                                             res_iovs, att_rb.nr_entries);
+
+    if (ret != 0)
+        virtio_gpu_cleanup_mapping_iov(res_iovs, att_rb.nr_entries);
 }
 
 static void virgl_resource_detach_backing(VirtIOGPU *g,
-- 
1.8.3.1