From 09a3f98b178e2479a888892503e8ab0e967798c1 Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Tue, 28 Jan 2003 12:10:11 +0000
Subject: Band-XXX-aid an easy to provoke panic.

MFC:	2 weeks
---
 sys/netatm/ipatm/ipatm_usrreq.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/netatm/ipatm/ipatm_usrreq.c b/sys/netatm/ipatm/ipatm_usrreq.c
index 4860594..154f06b 100644
--- a/sys/netatm/ipatm/ipatm_usrreq.c
+++ b/sys/netatm/ipatm/ipatm_usrreq.c
@@ -238,7 +238,14 @@ ipatm_ioctl(code, data, arg1)
 
 		/*
 		 * Notify the responsible ARP service
+		 *
+		 * XXX: if there is one.  No idea how this happens, but at
+		 * least don't panic on a NULL pointer if it does.
 		 */
+		if (inp->inf_serv == NULL) {
+			err = ENXIO;
+			break;
+		}
 		err = (*inp->inf_serv->is_ioctl)(code, data, inp->inf_isintf);
 		break;
 
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