Messages in this thread | | | Subject | Re: [PATCH v7 05/12] virtio_scsi: Add validation for residual bytes from response | From | Jason Wang <> | Date | Wed, 26 May 2021 10:41:36 +0800 |
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在 2021/5/17 下午5:55, Xie Yongji 写道: > This ensures that the residual bytes in response (might come > from an untrusted device) will not exceed the data buffer length. > > Signed-off-by: Xie Yongji <xieyongji@bytedance.com> > --- > drivers/scsi/virtio_scsi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c > index efcaf0674c8d..ad7d8cecec32 100644 > --- a/drivers/scsi/virtio_scsi.c > +++ b/drivers/scsi/virtio_scsi.c > @@ -97,7 +97,7 @@ static inline struct Scsi_Host *virtio_scsi_host(struct virtio_device *vdev) > static void virtscsi_compute_resid(struct scsi_cmnd *sc, u32 resid) > { > if (resid) > - scsi_set_resid(sc, resid); > + scsi_set_resid(sc, min(resid, scsi_bufflen(sc))); > } > > /*
Acked-by: Jason Wang <jasowang@redhat.com>
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