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-rw-r--r--sys/kern/sys_generic.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/kern/sys_generic.c b/sys/kern/sys_generic.c
index 94e44d888181..b472aaea89e6 100644
--- a/sys/kern/sys_generic.c
+++ b/sys/kern/sys_generic.c
@@ -2309,6 +2309,12 @@ sys_exterrctl(struct thread *td, struct exterrctl_args *uap)
return (EINVAL);
td->td_pflags2 &= ~TDP2_UEXTERR;
return (0);
+ case EXTERRCTL_UD:
+ /*
+ * Important: this code must always return EINVAL and never any
+ * extended error, for testing purposes.
+ */
+ /* FALLTHROUGH */
default:
return (EINVAL);
}