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diff --git a/sys/kern/tty.c b/sys/kern/tty.c
--- a/sys/kern/tty.c
+++ b/sys/kern/tty.c
@@ -2083,6 +2083,8 @@
FILEDESC_SLOCK(fdp);
error = fget_cap_locked(fdp, fd, cap_rights_init_one(&rights, CAP_TTYHOOK),
&fp, NULL);
+ if (error == 0 && !fhold(fp))
+ error = EBADF;
FILEDESC_SUNLOCK(fdp);
if (error != 0)
return (error);

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