gbm: convert gbm bo format to fourcc format on dma-buf import

At the moment if a gbm buffer is imported and the gbm buffer
has an old-style GBM_BO_FORMAT format, the import will crash,
since it's passed directly to DRI functions that expect
a fourcc format (as provided by the newer GBM_FORMAT
definitions)

This commit addresses the problem in two ways:

1) it prevents invalid formats from leading to a crash by
returning EINVAL if the image couldn't be created

2) it translates GBM_BO_FORMAT formats into the comparable
GBM_FORMAT formats.

Reference: https://bugzilla.gnome.org/show_bug.cgi?id=753531
CC: "10.6 11.0" <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Kristian Høgsberg <[email protected]>

1 files changed, 17 insertions, 1 deletions

diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index ccc3cc6930f..57cdeacdccd 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -706,14 +706,30 @@ gbm_dri_bo_import(struct gbm_device *gbm,
    {
       struct gbm_import_fd_data *fd_data = buffer;
       int stride = fd_data->stride, offset = 0;
+      int dri_format;
+
+      switch (fd_data->format) {
+      case GBM_BO_FORMAT_XRGB8888:
+         dri_format = GBM_FORMAT_XRGB8888;
+         break;
+      case GBM_BO_FORMAT_ARGB8888:
+         dri_format = GBM_FORMAT_ARGB8888;
+         break;
+      default:
+         dri_format = fd_data->format;
+      }
 
       image = dri->image->createImageFromFds(dri->screen,
                                              fd_data->width,
                                              fd_data->height,
-                                             fd_data->format,
+                                             dri_format,
                                              &fd_data->fd, 1,
                                              &stride, &offset,
                                              NULL);
+      if (image == NULL) {
+         errno = EINVAL;
+         return NULL;
+      }
       gbm_format = fd_data->format;
       break;
    }