diff --git a/sys/kern/kern_linker.c b/sys/kern/kern_linker.c
--- a/sys/kern/kern_linker.c
+++ b/sys/kern/kern_linker.c
@@ -657,6 +657,7 @@
 		return (NULL);
 	lf->ctors_addr = 0;
 	lf->ctors_size = 0;
+	lf->ctors_invoked = false;
 	lf->dtors_addr = 0;
 	lf->dtors_size = 0;
 	lf->refs = 1;
diff --git a/sys/kern/link_elf.c b/sys/kern/link_elf.c
--- a/sys/kern/link_elf.c
+++ b/sys/kern/link_elf.c
@@ -358,7 +358,7 @@
 }
 
 static void
-link_elf_invoke_ctors(caddr_t addr, size_t size)
+link_elf_invoke_cbs(caddr_t addr, size_t size)
 {
 	void (**ctor)(void);
 	size_t i, cnt;
@@ -373,6 +373,16 @@
 	}
 }
 
+static void
+link_elf_invoke_ctors(linker_file_t lf)
+{
+	KASSERT(!lf->ctors_invoked,
+	    ("%s: ctors already invoked", __func__));
+
+	link_elf_invoke_cbs(lf->ctors_addr, lf->ctors_size);
+	lf->ctors_invoked = true;
+}
+
 /*
  * Actions performed after linking/loading both the preloaded kernel and any
  * modules; whether preloaded or dynamicly loaded.
@@ -403,7 +413,7 @@
 #endif
 
 	/* Invoke .ctors */
-	link_elf_invoke_ctors(lf->ctors_addr, lf->ctors_size);
+	link_elf_invoke_ctors(lf);
 	return (0);
 }
 
diff --git a/sys/kern/link_elf_obj.c b/sys/kern/link_elf_obj.c
--- a/sys/kern/link_elf_obj.c
+++ b/sys/kern/link_elf_obj.c
@@ -658,6 +658,23 @@
 	}
 }
 
+static void
+link_elf_invoke_ctors(linker_file_t lf)
+{
+	KASSERT(!lf->ctors_invoked,
+	    ("%s: ctors already invoked", __func__));
+
+	link_elf_invoke_cbs(lf->ctors_addr, lf->ctors_size);
+	lf->ctors_invoked = true;
+}
+
+static void
+link_elf_invoke_dtors(linker_file_t lf)
+{
+	if (lf->ctors_invoked)
+		link_elf_invoke_cbs(lf->dtors_addr, lf->dtors_size);
+}
+
 static int
 link_elf_link_preload_finish(linker_file_t lf)
 {
@@ -684,7 +701,7 @@
 	/* Apply protections now that relocation processing is complete. */
 	link_elf_protect(ef);
 
-	link_elf_invoke_cbs(lf->ctors_addr, lf->ctors_size);
+	link_elf_invoke_ctors(lf);
 	return (0);
 }
 
@@ -1239,7 +1256,7 @@
 #endif
 
 	link_elf_protect(ef);
-	link_elf_invoke_cbs(lf->ctors_addr, lf->ctors_size);
+	link_elf_invoke_ctors(lf);
 	*result = lf;
 
 out:
@@ -1259,7 +1276,7 @@
 	elf_file_t ef = (elf_file_t) file;
 	u_int i;
 
-	link_elf_invoke_cbs(file->dtors_addr, file->dtors_size);
+	link_elf_invoke_dtors(file);
 
 	/* Notify MD code that a module is being unloaded. */
 	elf_cpu_unload_file(file);
diff --git a/sys/sys/linker.h b/sys/sys/linker.h
--- a/sys/sys/linker.h
+++ b/sys/sys/linker.h
@@ -82,6 +82,7 @@
     size_t		size;		/* size of file */
     caddr_t		ctors_addr;	/* address of .ctors/.init_array */
     size_t		ctors_size;	/* size of .ctors/.init_array */
+    bool		ctors_invoked;	/* have we run ctors yet? */
     caddr_t		dtors_addr;	/* address of .dtors/.fini_array */
     size_t		dtors_size;	/* size of .dtors/.fini_array */
     int			ndeps;		/* number of dependencies */