diff options
| author | Felipe Franciosi <felipe@nutanix.com> | 2019-02-27 16:10:34 +0000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-03-06 12:35:02 -0500 |
| commit | 3722e6a52174d7c3a00e6f5efd006ca093f346c1 (patch) | |
| tree | 1e03745bc153c08498824b1794799085290554ae /drivers | |
| parent | 441b7195e2812f2d7a9dafe02f052f642957bd8f (diff) | |
scsi: virtio_scsi: don't send sc payload with tmfs
The virtio scsi spec defines struct virtio_scsi_ctrl_tmf as a set of
device-readable records and a single device-writable response entry:
struct virtio_scsi_ctrl_tmf
{
// Device-readable part
le32 type;
le32 subtype;
u8 lun[8];
le64 id;
// Device-writable part
u8 response;
}
The above should be organised as two descriptor entries (or potentially
more if using VIRTIO_F_ANY_LAYOUT), but without any extra data after "le64
id" or after "u8 response".
The Linux driver doesn't respect that, with virtscsi_abort() and
virtscsi_device_reset() setting cmd->sc before calling virtscsi_tmf(). It
results in the original scsi command payload (or writable buffers) added to
the tmf.
This fixes the problem by leaving cmd->sc zeroed out, which makes
virtscsi_kick_cmd() add the tmf to the control vq without any payload.
Cc: stable@vger.kernel.org
Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/virtio_scsi.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 1a6f150cd2d8..8af01777d09c 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -586,7 +586,6 @@ static int virtscsi_device_reset(struct scsi_cmnd *sc) return FAILED; memset(cmd, 0, sizeof(*cmd)); - cmd->sc = sc; cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){ .type = VIRTIO_SCSI_T_TMF, .subtype = cpu_to_virtio32(vscsi->vdev, @@ -645,7 +644,6 @@ static int virtscsi_abort(struct scsi_cmnd *sc) return FAILED; memset(cmd, 0, sizeof(*cmd)); - cmd->sc = sc; cmd->req.tmf = (struct virtio_scsi_ctrl_tmf_req){ .type = VIRTIO_SCSI_T_TMF, .subtype = VIRTIO_SCSI_T_TMF_ABORT_TASK, |