diff options
| author | Greg Edwards <gedwards@ddn.com> | 2018-08-22 13:21:53 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-21 09:22:04 +0100 |
| commit | 3fb039d37f96b2b62dbe6115658a17a57156dcf3 (patch) | |
| tree | 7cd4f8d876d5032d9df89fdeb9b2f1edd1e265c5 | |
| parent | 543c52975eb8d946678840fdb7a590db3c04a6a5 (diff) | |
vhost/scsi: truncate T10 PI iov_iter to prot_bytes
commit 4542d623c7134bc1738f8a68ccb6dd546f1c264f upstream.
Commands with protection information included were not truncating the
protection iov_iter to the number of protection bytes in the command.
This resulted in vhost_scsi mis-calculating the size of the protection
SGL in vhost_scsi_calc_sgls(), and including both the protection and
data SG entries in the protection SGL.
Fixes: 09b13fa8c1a1 ("vhost/scsi: Add ANY_LAYOUT support in vhost_scsi_handle_vq")
Signed-off-by: Greg Edwards <gedwards@ddn.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Fixes: 09b13fa8c1a1093e9458549ac8bb203a7c65c62a
Cc: stable@vger.kernel.org
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/vhost/scsi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 17fcd3b2e686..fe7914dffd8f 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -964,7 +964,8 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesin); } /* - * Set prot_iter to data_iter, and advance past any + * Set prot_iter to data_iter and truncate it to + * prot_bytes, and advance data_iter past any * preceeding prot_bytes that may be present. * * Also fix up the exp_data_len to reflect only the @@ -973,6 +974,7 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) if (prot_bytes) { exp_data_len -= prot_bytes; prot_iter = data_iter; + iov_iter_truncate(&prot_iter, prot_bytes); iov_iter_advance(&data_iter, prot_bytes); } tag = vhost64_to_cpu(vq, v_req_pi.tag); |