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authorStefano Garzarella <sgarzare@redhat.com>2022-08-11 11:36:29 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 11:44:57 +0300
commitb91cf6e95b4f987d0d26def0c9cca3168d7752cb (patch)
treedfc470f4cf949f3ffd85d5f31a9e1d94f0e19b6a /drivers/vdpa
parent0c89e2a3a9d0815b6eb769ed22157bd9996cbb58 (diff)
downloadlinux-b91cf6e95b4f987d0d26def0c9cca3168d7752cb.tar.xz
vdpa_sim_blk: check if sector is 0 for commands other than read or write
VIRTIO spec states: "The sector number indicates the offset (multiplied by 512) where the read or write is to occur. This field is unused and set to 0 for commands other than read or write." Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220811083632.77525-2-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim_blk.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index ba253f8bce32..69c9f4f36f9a 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -112,6 +112,15 @@ static bool vdpasim_blk_handle_req(struct vdpasim *vdpasim,
offset = sector << SECTOR_SHIFT;
status = VIRTIO_BLK_S_OK;
+ if (type != VIRTIO_BLK_T_IN && type != VIRTIO_BLK_T_OUT &&
+ sector != 0) {
+ dev_dbg(&vdpasim->vdpa.dev,
+ "sector must be 0 for %u request - sector: 0x%llx\n",
+ type, sector);
+ status = VIRTIO_BLK_S_IOERR;
+ goto err_status;
+ }
+
switch (type) {
case VIRTIO_BLK_T_IN:
if (!vdpasim_blk_check_range(sector, to_push)) {
@@ -178,6 +187,7 @@ static bool vdpasim_blk_handle_req(struct vdpasim *vdpasim,
break;
}
+err_status:
/* If some operations fail, we need to skip the remaining bytes
* to put the status in the last byte
*/