Commit a7f85e03 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

virtio-gpu: fix unmap in error path 



We land here in case not everything we've asked for could be mapped.
So unmap only the bytes which have actually been mapped.

Also we didn't access anything, so acces_len can be 0.

Reported-by: default avatarLaszlo Ersek <lersek@redhat.com>
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarLaszlo Ersek <lersek@redhat.com>
Reviewed-by: default avatarLi Qiang <liq3ea@gmail.com>
Message-id: 20190628072357.31782-1-kraxel@redhat.com
parent 506179e4

hw/display/virtio-gpu.c

+2 −2
Original line number Diff line number Diff line
@@ -1048,9 +1048,9 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size, 
                if (res->iov[i].iov_base) {

                    dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,

                                     res->iov[i].iov_base,

                                     res->iov[i].iov_len,

                                     len,

                                     DMA_DIRECTION_TO_DEVICE,

                                     res->iov[i].iov_len);

                                     0);

                }

                /* ...and the mappings for previous loop iterations */

                res->iov_cnt = i;