Messages in this thread Patch in this message | | | From | Xie Yongji <> | Subject | [PATCH v7 05/12] virtio_scsi: Add validation for residual bytes from response | Date | Mon, 17 May 2021 17:55:06 +0800 |
| |
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))); } /* -- 2.11.0
| |