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virtio_ring: Fix potential mem leak in virtqueue_add_indirect_packed

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'desc' should be freed before leaving from err handing path.

Fixes: 1ce9e6055f ("virtio_ring: introduce packed ring support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
stable@vger.kernel.org
This commit is contained in:
YueHaibing 2019-03-12 15:06:53 +08:00 committed by Michael S. Tsirkin
parent e93c9c99a6
commit df0bfe7501
1 changed files with 1 additions and 0 deletions
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drivers/virtio/virtio_ring.c
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@ -1004,6 +1004,7 @@ static int virtqueue_add_indirect_packed(struct vring_virtqueue *vq,
if (unlikely(vq->vq.num_free < 1)) {
pr_debug("Can't add buf len 1 - avail = 0\n");
kfree(desc);
END_USE(vq);
return -ENOSPC;
}