patch for netinet crash

[Matthew Dillon]

:There is a race condition that seems to be affecting only me, and apparently only when I
:run puTTY as a client.  Here's a patch that fixes it, in addition to the one Matt
:submitted.
:
:===================================================================
:RCS file: /home/dcvs/src/sys/netinet/ip_input.c,v
:retrieving revision 1.43
:diff -u -r1.43 ip_input.c
:--- ip_input.c  29 Dec 2004 03:26:42 -0000      1.43
:+++ ip_input.c  5 Jan 2005 21:22:40 -0000
:@@ -742,6 +742,8 @@
:         */
:        if (m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) {
:                TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrhead, ifa_link) {
:+                       if (ifa == NULL)
:+                               continue;
:                        if (ifa->ifa_addr == NULL) /* shutdown/startup race */
:                                continue;
:                        if (ifa->ifa_addr->sa_family != AF_INET)
:

    That's impossible, ifa is the iteration variable and it should not
    be possible for it to be NULL.  Could you take it out and see if your
    box continues to crash get a crash dump?

    (If you need a leaf account to upload crash dumps too send me a private
    email with your ssh public key).

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>