diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 0cc8e04295a40dc1d16f308396afdfb7540aa48c..66b1568b95e05a5cd13a3a75ef2b6d5c6a4e8fd8 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -713,7 +713,8 @@ static void update_sections_early(struct section_perm perms[], int n)
 		if (t->flags & PF_KTHREAD)
 			continue;
 		for_each_thread(t, s)
-			set_section_perms(perms, n, true, s->mm);
+			if (s->mm)
+				set_section_perms(perms, n, true, s->mm);
 	}
 	set_section_perms(perms, n, true, current->active_mm);
 	set_section_perms(perms, n, true, &init_mm);