[src/trunk]: src/sys/netinet In the event of an error within arpresolve(), de...

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/621cfb976e46
branches:  trunk
changeset: 811147:621cfb976e46
user:      roy <roy%NetBSD.org@localhost>
date:      Wed Oct 14 11:22:55 2015 +0000

description:
In the event of an error within arpresolve(), delete the cloned route
otherwise it would never be deleted.

diffstat:

 sys/netinet/if_arp.c |  28 +++++++++++++++++-----------
 1 files changed, 17 insertions(+), 11 deletions(-)

diffs (87 lines):

diff -r c7f1bac8e2a1 -r 621cfb976e46 sys/netinet/if_arp.c
--- a/sys/netinet/if_arp.c      Wed Oct 14 11:17:57 2015 +0000
+++ b/sys/netinet/if_arp.c      Wed Oct 14 11:22:55 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_arp.c,v 1.188 2015/10/14 11:17:57 roy Exp $ */
+/*     $NetBSD: if_arp.c,v 1.189 2015/10/14 11:22:55 roy Exp $ */
 
 /*-
  * Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@@ -68,7 +68,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.188 2015/10/14 11:17:57 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.189 2015/10/14 11:22:55 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_ddb.h"
@@ -840,8 +840,8 @@
        if (ifp->if_flags & _IFF_NOARP) {
                if (la != NULL)
                        LLE_RUNLOCK(la);
-               m_freem(m);
-               return ENOTSUP;
+               error = ENOTSUP;
+               goto bad;
        }
 #undef _IFF_NOARP
        if (la == NULL) {
@@ -859,13 +859,13 @@
                IF_AFDATA_RUNLOCK(ifp);
        }
 
+       error = EINVAL;
        if (la == NULL) {
                log(LOG_DEBUG,
                    "%s: failed to %s llentry for %s on %s\n",
                    __func__, create_lookup, inet_ntoa(satocsin(dst)->sin_addr),
                    ifp->if_xname);
-               m_freem(m);
-               return EINVAL;
+               goto bad;
        }
 
        /* Just in case */
@@ -875,8 +875,7 @@
                    "%s: valid llentry has no rtentry for %s on %s\n",
                    __func__, inet_ntoa(satocsin(dst)->sin_addr),
                    ifp->if_xname);
-               m_freem(m);
-               return EINVAL;
+               goto bad;
        }
        rt = la->la_rt;
 
@@ -917,11 +916,11 @@
        }
 
        if (la->la_flags & LLE_STATIC) {   /* should not happen! */
+               LLE_RUNLOCK(la);
                log(LOG_DEBUG, "arpresolve: ouch, empty static llinfo for %s\n",
                    inet_ntoa(satocsin(dst)->sin_addr));
-               m_freem(m);
                error = EINVAL;
-               goto done;
+               goto bad;
        }
 
        renew = (la->la_asked == 0 || la->la_expire != time_uptime);
@@ -983,9 +982,16 @@
                    &satocsin(dst)->sin_addr, enaddr);
                return error;
        }
-done:
+
        LLE_RUNLOCK(la);
+       return error;
 
+bad:
+       m_freem(m);
+       if (rt != NULL && (rt->rt_flags & RTF_CLONED) != 0) {
+               rtrequest(RTM_DELETE, rt_getkey(rt),
+                   rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
+       }
        return error;
 }