From d68f63b5fe5d714791bf1e80eec4bee89a20ff43 Mon Sep 17 00:00:00 2001
From: Bram Matthys <syzop@vulnscan.org>
Date: Fri, 18 Dec 2015 11:29:30 +0100
Subject: [PATCH] If an oper whois'ed an oper who didn't use /OPER but OperServ
 to become oper then the IRCd would crash when trying to resolve the oper
 login name. Clear, right?

---
 src/modules/m_whois.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/modules/m_whois.c b/src/modules/m_whois.c
index 7379948fc..065ac6009 100644
--- a/src/modules/m_whois.c
+++ b/src/modules/m_whois.c
@@ -324,7 +324,9 @@ CMD_FUNC(m_whois)
 							operclass = oper->operclass;
 						sendto_one(sptr,
 						    ":%s 313 %s %s :is %s (%s) [%s]", me.name,
-						    sptr->name, name, buf, acptr->user->operlogin, operclass);
+						    sptr->name, name, buf,
+						    acptr->user->operlogin ? acptr->user->operlogin : "unknown",
+						    operclass);
 					}
 					else
 						sendto_one(sptr,