diff options
| author | Roman Kagan <rvkagan@yandex-team.ru> | 2020-05-29 01:55:09 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2020-06-17 14:53:40 +0200 |
| commit | 6abee2608563599f783bf1305a8322ee7b447815 (patch) | |
| tree | 49edca75aba77a08ca5f11757d9e7fa77f4f9d9e /hw/block/virtio-blk.c | |
| parent | d54f36ea8c26af32584511533f8884ac7a50bf4a (diff) | |
| download | qemu-6abee2608563599f783bf1305a8322ee7b447815.zip | |
virtio-blk: store opt_io_size with correct size
The width of opt_io_size in virtio_blk_config is 32bit. However, it's
written with virtio_stw_p; this may result in value truncation, and on
big-endian systems with legacy virtio in completely bogus readings in
the guest.
Use the appropriate accessor to store it.
Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200528225516.1676602-2-rvkagan@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/block/virtio-blk.c')
| -rw-r--r-- | hw/block/virtio-blk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 8882a1d1d4..6938a75aa5 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -930,7 +930,7 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config) virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls); virtio_stl_p(vdev, &blkcfg.blk_size, blk_size); virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size); - virtio_stw_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); + virtio_stl_p(vdev, &blkcfg.opt_io_size, conf->opt_io_size / blk_size); blkcfg.geometry.heads = conf->heads; /* * We must ensure that the block device capacity is a multiple of |