diff options
Diffstat (limited to 'hw/9pfs/virtio-9p-device.c')
| -rw-r--r-- | hw/9pfs/virtio-9p-device.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c index b5a7c03f26..991e175c82 100644 --- a/hw/9pfs/virtio-9p-device.c +++ b/hw/9pfs/virtio-9p-device.c @@ -147,19 +147,22 @@ static ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset, } static void virtio_init_in_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov, - unsigned int *pniov, size_t size) + unsigned int *pniov, size_t *size) { V9fsState *s = pdu->s; V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); VirtQueueElement *elem = v->elems[pdu->idx]; size_t buf_size = iov_size(elem->in_sg, elem->in_num); - if (buf_size < size) { + if (buf_size < P9_IOHDRSZ) { VirtIODevice *vdev = VIRTIO_DEVICE(v); virtio_error(vdev, - "VirtFS reply type %d needs %zu bytes, buffer has %zu", - pdu->id + 1, size, buf_size); + "VirtFS reply type %d needs %zu bytes, buffer has %zu, less than minimum", + pdu->id + 1, *size, buf_size); + } + if (buf_size < *size) { + *size = buf_size; } *piov = elem->in_sg; |