The following reply was made to PR kern/130977; it has been noted by GNATS.
From: Max Laier <m...@love2party.net>
To: bug-follo...@freebsd.org,
darki...@gmail.com
Cc:
Subject: Re: kern/130977: [netgraph][pf] kernel panic trap 12 on user connect
to VPN server
Date: Sat, 11 Apr 2009 01:11:54 +0100
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Here is the MFC patch - if possible, please try and report back.
--
Max
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filename="mfc.ifg.patch"
Index: sys/net/if.c
===================================================================
--- sys/net/if.c (revision 190905)
+++ sys/net/if.c (working copy)
@@ -128,6 +128,7 @@
static void do_link_state_change(void *, int);
static int if_getgroup(struct ifgroupreq *, struct ifnet *);
static int if_getgroupmembers(struct ifgroupreq *);
+static void if_delgroups(struct ifnet *);
#ifdef INET6
/*
* XXX: declare here to avoid to include many inet6 related files..
@@ -828,6 +829,7 @@
rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
+ if_delgroups(ifp);
IF_AFDATA_LOCK(ifp);
for (dp = domains; dp; dp = dp->dom_next) {
@@ -963,6 +965,53 @@
}
/*
+ * Remove an interface from all groups
+ */
+static void
+if_delgroups(struct ifnet *ifp)
+{
+ struct ifg_list *ifgl;
+ struct ifg_member *ifgm;
+ char groupname[IFNAMSIZ];
+
+ IFNET_WLOCK();
+ while (!TAILQ_EMPTY(&ifp->if_groups)) {
+ ifgl = TAILQ_FIRST(&ifp->if_groups);
+
+ strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
+
+ IF_ADDR_LOCK(ifp);
+ TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
+ IF_ADDR_UNLOCK(ifp);
+
+ TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
+ if (ifgm->ifgm_ifp == ifp)
+ break;
+
+ if (ifgm != NULL) {
+ TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
+ ifgm_next);
+ free(ifgm, M_TEMP);
+ }
+
+ if (--ifgl->ifgl_group->ifg_refcnt == 0) {
+ TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next);
+ EVENTHANDLER_INVOKE(group_detach_event,
+ ifgl->ifgl_group);
+ free(ifgl->ifgl_group, M_TEMP);
+ }
+ IFNET_WUNLOCK();
+
+ free(ifgl, M_TEMP);
+
+ EVENTHANDLER_INVOKE(group_change_event, groupname);
+
+ IFNET_WLOCK();
+ }
+ IFNET_WUNLOCK();
+}
+
+/*
* Stores all groups from an interface in memory pointed
* to by data
*/
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