=== DF-0666 environment ===
Host uname: Linux 8748f8685296 6.12.85+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.85-1 (2026-04-30) x86_64 GNU/Linux
Cited file: sys/netgraph/ng_device.c (dead code)

=== sys/conf/files entries ===
1699:netgraph7/ng_device.c		optional netgraph7_device

=== Cited bug ===
589:	m = m_devget(buffer, len, 0, NULL);
591:	NG_SEND_DATA_ONLY(error, connection->active_hook, m);

=== netgraph7 rewrite (has the fix) ===
460:	if (uio->uio_resid == 0)
461-		return (0);
--
466:	if ((m = m_uiotombuf(uio, M_NOWAIT, 0, 0, M_PKTHDR)) == NULL)
467-		return (ENOBUFS);