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drm-lease-v1: skip device on wlr_drm_backend_get_non_master_fd failure 

On some setups, wlr_drm_backend_get_non_master_fd may fail because
of permission issues. Instead of exposing a bogus global, bail out.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3391
This commit is contained in:
Simon Ser 2022-03-29 16:14:38 +02:00 committed by Simon Zeni
parent 95d3529edf
commit 410c08cdc6
1 changed files with 11 additions and 3 deletions
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14
types/wlr_drm_lease_v1.c
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@ -621,10 +621,18 @@ static void handle_backend_destroy(struct wl_listener *listener, void *data) {
static void drm_lease_device_v1_create(struct wlr_drm_lease_v1_manager *manager,
struct wlr_backend *backend) {
assert(backend);
struct wlr_drm_backend *drm_backend = get_drm_backend_from_backend(backend);
// Make sure we can get a non-master FD for the DRM backend. On some setups
// we don't have the permission for this.
int fd = wlr_drm_backend_get_non_master_fd(backend);
if (fd < 0) {
wlr_log(WLR_INFO, "Skipping %s: failed to get read-only DRM FD",
drm_backend->name);
return;
}
close(fd);
struct wlr_drm_backend *drm_backend =
get_drm_backend_from_backend(backend);
wlr_log(WLR_DEBUG, "Creating wlr_drm_lease_device_v1 for %s",
drm_backend->name);