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Date: Mon, 17 May 2021 17:55:06 +0800 From: Xie Yongji <xieyongji@...edance.com> To: mst@...hat.com, jasowang@...hat.com, stefanha@...hat.com, sgarzare@...hat.com, parav@...dia.com, hch@...radead.org, christian.brauner@...onical.com, rdunlap@...radead.org, willy@...radead.org, viro@...iv.linux.org.uk, axboe@...nel.dk, bcrl@...ck.org, corbet@....net, mika.penttila@...tfour.com, dan.carpenter@...cle.com, joro@...tes.org Cc: virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, kvm@...r.kernel.org, linux-fsdevel@...r.kernel.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Subject: [PATCH v7 05/12] 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. Signed-off-by: Xie Yongji <xieyongji@...edance.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
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