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gpu-kms: Don't crash if drmModeGetResources returns NULL

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DRM drivers can be opened by meta_launcher_open_restricted() even if they don't
implement modesetting. However, drmModeGetResources() will return NULL.

Check whether that happened in meta_gpu_kms_new() and return with an error
instead of crashing.

Fixes #223.
This commit is contained in:
Aaron Plattner 2018-07-19 10:51:34 -07:00 committed by Ray Strode
parent 4e57e4c4f8
commit 5e56384636
1 changed files with 7 additions and 0 deletions
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7
src/backends/native/meta-gpu-kms.c
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@ -804,6 +804,13 @@ meta_gpu_kms_new (MetaMonitorManagerKms *monitor_manager_kms,
*/
drm_resources = drmModeGetResources (kms_fd);
if (!drm_resources)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "No resources");
meta_launcher_close_restricted (launcher, kms_fd);
return NULL;
}
n_connectors = drm_resources->count_connectors;
drmModeFreeResources (drm_resources);