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-rw-r--r--hw/virtio-blk.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 9a0c0674f..5d3355996 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -294,6 +294,7 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config)
bdrv_get_geometry(s->bs, &capacity);
bdrv_get_geometry_hint(s->bs, &cylinders, &heads, &secs);
+ memset(&blkcfg, 0, sizeof(blkcfg));
stq_raw(&blkcfg.capacity, capacity);
stl_raw(&blkcfg.seg_max, 128 - 2);
stw_raw(&blkcfg.cylinders, cylinders);