https://sources.debian.org/patches/xf86-video-omap/0.4.5-1.1/null-dereference.patch/
https://bugs.gentoo.org/707358
--- a/src/omap_driver.c
+++ v/src/omap_driver.c
@@ -542,7 +542,7 @@ OMAPPreInit(ScrnInfoPtr pScrn, int flags
 	}
 
 	if (!pScrn->chipset) {
-		ERROR_MSG("Unknown chipset: %s", pScrn->chipset);
+		ERROR_MSG("Unknown chipset");
 		goto fail;
 	}