Commit 5f638e5a authored by Xie Yongji's avatar Xie Yongji Committed by Martin K. Petersen
Browse files

scsi: virtio_scsi: Add validation for residual bytes from response 

This ensures that the residual bytes in response (might come from an
untrusted device) will not exceed the data buffer length.

Link: https://lore.kernel.org/r/20210615105218.214-1-xieyongji@bytedance.com


Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 7df47cdf

drivers/scsi/virtio_scsi.c

+1 −1
Original line number Diff line number Diff line
@@ -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)));

}



/*