[Spice-devel] [PATCH spice-server v2 1/2] red-replay-qxl: Fix some issue of alignment

[Uri Lublin]

On 7/19/19 12:18 PM, Frediano Ziglio wrote:
> Do not pass unaligned QXLPHYSICAL but pass a valid pointer and
> then cast.
> 
> Signed-off-by: Frediano Ziglio <fziglio at redhat.com>

Ack.

Uri.

> ---
>   server/red-replay-qxl.c | 18 +++++++++++++-----
>   1 file changed, 13 insertions(+), 5 deletions(-)
> 
> Changes since v1:
> - remove unnecessary casts
> 
> diff --git a/server/red-replay-qxl.c b/server/red-replay-qxl.c
> index fa44fa7c4..674feae2f 100644
> --- a/server/red-replay-qxl.c
> +++ b/server/red-replay-qxl.c
> @@ -311,10 +311,12 @@ static ssize_t red_replay_data_chunks(SpiceReplay *replay, const char *prefix,
>       data_size = cur->data_size;
>       cur->next_chunk = cur->prev_chunk = 0;
>       while (count_chunks-- > 0) {
> -        if (read_binary(replay, prefix, &next_data_size, (uint8_t**)&cur->next_chunk,
> -            sizeof(QXLDataChunk)) == REPLAY_ERROR) {
> +        uint8_t *data = NULL;
> +        if (read_binary(replay, prefix, &next_data_size, &data,
> +                        sizeof(QXLDataChunk)) == REPLAY_ERROR) {
>               return -1;
>           }
> +        cur->next_chunk = QXLPHYSICAL_FROM_PTR(data);
>           data_size += next_data_size;
>           next = QXLPHYSICAL_TO_PTR(cur->next_chunk);
>           next->prev_chunk = QXLPHYSICAL_FROM_PTR(cur);
> @@ -472,7 +474,9 @@ static QXLImage *red_replay_image(SpiceReplay *replay, uint32_t flags)
>           if (qxl_flags & QXL_BITMAP_DIRECT) {
>               qxl->bitmap.data = QXLPHYSICAL_FROM_PTR(red_replay_image_data_flat(replay, &bitmap_size));
>           } else {
> -            size = red_replay_data_chunks(replay, "bitmap.data", (uint8_t**)&qxl->bitmap.data, 0);
> +            uint8_t *data = NULL;
> +            size = red_replay_data_chunks(replay, "bitmap.data", &data, 0);
> +            qxl->bitmap.data = QXLPHYSICAL_FROM_PTR(data);
>               if (size != bitmap_size) {
>                   g_warning("bad image, %" G_GSIZE_FORMAT " != %" G_GSIZE_FORMAT, size, bitmap_size);
>                   return NULL;
> @@ -710,7 +714,9 @@ static void red_replay_stroke_ptr(SpiceReplay *replay, QXLStroke *qxl, uint32_t
>           size_t size;
>   
>           replay_fscanf(replay, "attr.style_nseg %d\n", &temp); qxl->attr.style_nseg = temp;
> -        read_binary(replay, "style", &size, (uint8_t**)&qxl->attr.style, 0);
> +        uint8_t *data = NULL;
> +        read_binary(replay, "style", &size, &data, 0);
> +        qxl->attr.style = QXLPHYSICAL_FROM_PTR(data);
>       }
>       red_replay_brush_ptr(replay, &qxl->brush, flags);
>       replay_fscanf(replay, "fore_mode %d\n", &temp); qxl->fore_mode = temp;
> @@ -1134,7 +1140,9 @@ static QXLSurfaceCmd *red_replay_surface_cmd(SpiceReplay *replay)
>           }
>           size = qxl->u.surface_create.height * abs(qxl->u.surface_create.stride);
>           if ((qxl->flags & QXL_SURF_FLAG_KEEP_DATA) != 0) {
> -            read_binary(replay, "data", &read_size, (uint8_t**)&qxl->u.surface_create.data, 0);
> +            uint8_t *data = NULL;
> +            read_binary(replay, "data", &read_size, &data, 0);
> +            qxl->u.surface_create.data = QXLPHYSICAL_FROM_PTR(data);
>               if (read_size != size) {
>                   g_warning("mismatch %" G_GSIZE_FORMAT " != %" G_GSIZE_FORMAT, size, read_size);
>               }
>