diff --git a/sys/arm64/arm64/undefined.c b/sys/arm64/arm64/undefined.c
--- a/sys/arm64/arm64/undefined.c
+++ b/sys/arm64/arm64/undefined.c
@@ -322,8 +322,9 @@
 
 	if (el == 0) {
 		ret = fueword32((uint32_t *)frame->tf_elr, &insn);
+		/* Raise a SIGILL if we are unable to read the instruction */
 		if (ret != 0)
-			panic("Unable to read userspace faulting instruction");
+			return (0);
 	} else {
 		insn = *(uint32_t *)frame->tf_elr;
 	}