Re: [PATCH] drm/virtio: Fix a double free in virtio_gpu_cmd_map()

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On Fri, Oct 30, 2020 at 4:48 AM Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
This is freed both here and in the caller (virtio_gpu_vram_map()) so
it's a double free.  The correct place is only in the caller.

Fixes: 16845c5d5409 ("drm/virtio: implement blob resources: implement vram object")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 72586cd8cc4c..3f200306c9d7 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -1212,10 +1212,8 @@ int virtio_gpu_cmd_map(struct virtio_gpu_device *vgdev,
        struct virtio_gpu_resp_map_info *resp_buf;

        resp_buf = kzalloc(sizeof(*resp_buf), GFP_KERNEL);
-       if (!resp_buf) {
-               virtio_gpu_array_put_free(objs);
+       if (!resp_buf)
                return -ENOMEM;
-       }

        cmd_p = virtio_gpu_alloc_cmd_resp
                (vgdev, virtio_gpu_cmd_resource_map_cb, &vbuf, sizeof(*cmd_p),
--
2.28.0
Reviewed-by: Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>
 
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