lguest: fix bug in setting guest GDT entry

We kill the guest, but then we blatt random stuff.

Reported-by: Dan Carpenter <[e-mail]>
Signed-off-by: Rusty Russell <[e-mail]>
Cc: [e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/lguest/segments.c

···
 	 * We assume the Guest has the same number of GDT entries as the
 	 * Host, otherwise we'd have to dynamically allocate the Guest GDT.
 	 */
-	if (num >= ARRAY_SIZE(cpu->arch.gdt))
+	if (num >= ARRAY_SIZE(cpu->arch.gdt)) {
 		kill_guest(cpu, "too many gdt entries %i", num);
+		return;
+	}
 
 	/* Set it up, then fix it. */
 	cpu->arch.gdt[num].a = lo;