drm: fix uninitialized read
get_drm_prop_blob does not set path_len if it returns NULL. Check the return value before path_len to avoid reading uninitialized memory. (Granted, this doesn't change the logic at all, but it does make Valgrind a bit happier.)
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@ -1398,7 +1398,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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bool is_mst = false;
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char *path = get_drm_prop_blob(drm->fd, wlr_conn->id,
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wlr_conn->props.path, &path_len);
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if (path_len > 4 && path && strncmp(path, "mst:", 4) == 0) {
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if (path && path_len > 4 && strncmp(path, "mst:", 4) == 0) {
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is_mst = true;
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}
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free(path);
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