Commit 0cea71a2 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

virtio: don't mark unaccessed memory as dirty 



offset of accessed buffer is calculated using iov_length, so it
can exceed accessed len. If that happens
math in len - offset wraps around, and size becomes wrong.
As real value is 0, so this is harmless but unnecessary.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 6f8fd253

hw/virtio.c

+1 −1
Original line number Diff line number Diff line
@@ -241,7 +241,7 @@ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, 
                                  elem->in_sg[i].iov_len,

                                  1, size);



        offset += elem->in_sg[i].iov_len;

        offset += size;

    }



    for (i = 0; i < elem->out_num; i++)