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@xxxxxxxxxxxxx>
---
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@xxxxxxxxxx>
