Index: sys/arch/x86/x86/fpu.c
===================================================================
RCS file: /cvsroot/src/sys/arch/x86/x86/fpu.c,v
retrieving revision 1.12.8.3
diff -u -r1.12.8.3 fpu.c
--- sys/arch/x86/x86/fpu.c	10 Jul 2018 15:35:26 -0000	1.12.8.3
+++ sys/arch/x86/x86/fpu.c	8 Feb 2019 15:01:40 -0000
@@ -440,9 +440,12 @@
 	struct pcb *pcb;
 	int s;
 
-	if (!USERMODE(frame->tf_cs, frame->tf_eflags))
-		panic("fpudna from kernel, ip %p, trapframe %p\n",
-		    (void *)X86_TF_RIP(frame), frame);
+	if (!USERMODE(frame->tf_cs, frame->tf_eflags)){
+	  //		panic("fpudna from kernel, ip %p, trapframe %p\n",
+	  //		    (void *)X86_TF_RIP(frame), frame);
+	  clts();
+	  return;
+	}
 
 	if (i386_fpu_present == 0) {
 		send_sigill((void *)X86_TF_RIP(frame));