Date: Wed, 20 Oct 2010 12:38:05 +0000 (UTC) From: Maxim Konovalov <maxim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r214108 - stable/8/sys/netinet/ipfw Message-ID: <201010201238.o9KCc56Y057580@svn.freebsd.org>
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Author: maxim Date: Wed Oct 20 12:38:05 2010 New Revision: 214108 URL: http://svn.freebsd.org/changeset/base/214108 Log: MFC r211992: some programs could send broadcast/multicast traffic to ipfw pseudo-interface. This leads to a panic due to uninitialized if_broadcastaddr address. Initialize it and implement ip_output() method to prevent mbuf leak later. Modified: stable/8/sys/netinet/ipfw/ip_fw_log.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) Modified: stable/8/sys/netinet/ipfw/ip_fw_log.c ============================================================================== --- stable/8/sys/netinet/ipfw/ip_fw_log.c Wed Oct 20 09:50:11 2010 (r214107) +++ stable/8/sys/netinet/ipfw/ip_fw_log.c Wed Oct 20 12:38:05 2010 (r214108) @@ -103,6 +103,24 @@ log_dummy(struct ifnet *ifp, u_long cmd, return EINVAL; } +static int +ipfw_log_output(struct ifnet *ifp, struct mbuf *m, + struct sockaddr *dst, struct route *ro) +{ + if (m != NULL) + m_freem(m); + return EINVAL; +} + +static void +ipfw_log_start(struct ifnet* ifp) +{ + panic("ipfw_log_start() must not be called"); +} + +static const u_char ipfwbroadcastaddr[6] = + { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + void ipfw_log_bpf(int onoff) { @@ -119,11 +137,12 @@ ipfw_log_bpf(int onoff) ifp->if_flags = IFF_UP | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_init = (void *)log_dummy; ifp->if_ioctl = log_dummy; - ifp->if_start = (void *)log_dummy; - ifp->if_output = (void *)log_dummy; + ifp->if_start = ipfw_log_start; + ifp->if_output = ipfw_log_output; ifp->if_addrlen = 6; ifp->if_hdrlen = 14; if_attach(ifp); + ifp->if_broadcastaddr = ipfwbroadcastaddr; ifp->if_baudrate = IF_Mbps(10); bpfattach(ifp, DLT_EN10MB, 14); log_if = ifp;
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