virtqueue_add_buffer must check that there is room for multiple buffers

Ensure there is enough room for all the buffers being added to the vring. Signed-off-by: Tammy Leino <[email protected]> virtqueue_add_buffer must check that there is room for multiple buffers Ensure there is enough room for all the buffers being added to the vring. Signed-off-by: Tammy Leino <[email protected]>
OpenAMP · Apr 12, 2022 · 54678e7 · 54678e7
1 parent b90535e
commit 54678e7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/virtio/virtqueue.c b/lib/virtio/virtqueue.c
@@ -131,7 +131,7 @@ int virtqueue_add_buffer(struct virtqueue *vq, struct virtqueue_buf *buf_list,
 
  VQ_PARAM_CHK(vq == NULL, status, ERROR_VQUEUE_INVLD_PARAM);
  VQ_PARAM_CHK(needed < 1, status, ERROR_VQUEUE_INVLD_PARAM);
- VQ_PARAM_CHK(vq->vq_free_cnt == 0, status, ERROR_VRING_FULL);
+ VQ_PARAM_CHK(vq->vq_free_cnt < needed, status, ERROR_VRING_FULL);
 
  VQUEUE_BUSY(vq);